LX7180A - Carte d'évaluation Microchip - Free user manual and instructions

USER MANUAL LX7180A Microchip

Note the following details of the code protection feature on Microchip products:

• Microchip products meet the specifications contained in their particular Microchip Data Sheet.
- Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and under normal conditions.
- Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act.
- Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not mean that we are guaranteeing the product is "unbreakable" Code protection is constantly evolving. Microchip is committed to continuously improving the code protection features of our products.

This publication and the information herein may be used only with Microchip products, including to design, test, and integrate Microchip products with your application. Use of this information in any other manner violates these terms. Information regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. Contact your local Microchip sales office for additional support or, obtain additional support at https://www.microchip.com/en-us/support/design-help/client-support-services.

THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS". MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE, OR WARRANTIES RELATED TO ITS CONDITION, QUALITY, OR PERFORMANCE.

IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, INCIDENTAL, OR CONSEQUENTIAL LOSS, DAMAGE, COST, OR EXPENSE OF ANY KIND WHATSOEVER RELATED TO THE INFORMATION OR ITS USE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE FORESEEABLE. TO THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON ALL CLAIMS IN ANY WAY RELATED TO THE INFORMATION OR ITS USE WILL NOT EXCEED THE AMOUNT OF FEES, IF ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR THE INFORMATION.

Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights unless otherwise stated.

For information regarding Microchip's Quality Management Systems, please visit www.microchip.com/quality.

Trademarks

The Microchip name and logo, the Microchip logo, Adaptec, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus, maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash, Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O, Vectron, and XMEGA are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

AgileSwitch, APT, ClockWorks, The Embedded Control Solutions Company, EtherSynch, Flashtec, Hyper Speed Control, HyperLight Load, Libero, motorBench, mTouch, Powermite 3, Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-Wire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub, TimePictra, TimeProvider, TrueTime, and ZL are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky, BodyCom, Clockstudio, CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, Espresso T1S, EtherGREEN, GridTime, IdealBridge, In-Circuit Serial Programming, ICSP, INICnet, Intelligent Paralleling, IntelliMOS, Inter-Chip Connectivity, JitterBlocker, Knob-on-Display, KoD, maxCrypto, masView, memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP, SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI, SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total Endurance, Trusted Time, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY, ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

The Adaptec logo, Frequency on Demand, Silicon Storage Technology, and Symmcom are registered trademarks of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in other countries.

All other trademarks mentioned herein are property of their respective companies.

© 2023-2024, Microchip Technology Incorporated and its subsidiaries.

All Rights Reserved.

ISBN: 978-1-6683-4499-6

Table of Contents

Preface 5

Introduction....5

Document Layout 5

Conventions Used in this Guide 6

Recommended Reading....7

The Microchip Website....7

Customer Support 7

Document Revision History 7

Chapter 1. Product Overview

1.1 Introduction ...... 9

1.2 LX7180A Short Overview 9

1.3 What is the LX7180A Evaluation Board? 10

1.4 Contents of the LX7180A Evaluation Board Kit 10

Chapter 2. Installation and Operation

2.1 Introduction ...... 11

2.2 Features 12

2.3 Getting Started 12

Chapter 3. GUI Installation and Operation

3.1 Getting Started 17

3.2 Graphical User Interface (GUI) Installation 17

Chapter 4. GUI Description

4.1 Introduction ...... 21

4.2 The Graphical User Interface (GUI) 22

Appendix A. Schematic and Layouts

A.1 Introduction 29

A.2 Board – Schematic 30

A.3 Board – Top Copper and Silk Layer 31

A.4 Board – Signal Layer 1 ...... 31

A.5 Board – Signal Layer 2 ...... 32

A.6 Board – Bottom Copper and Silk 32

Appendix B. Bill of Materials

Appendix C. LX7180A Control Register Bit Definition

Worldwide Sales and Service 37

NOTES:

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our website (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a "DS" number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is "DSXXXXXA", where "XXXXX" is the document number and "A" is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB ^® IDE online help. Select the Help menu, and then Topics to open a list of available online help files.

INTRODUCTION

This chapter contains general information that will be useful to know before using the LX7180A Evaluation Board. Items discussed in this chapter include:

• Document Layout
• Conventions Used in this Guide
• Recommended Reading
  • The Microchip Website
• Customer Support
  • Document Revision History

DOCUMENT LAYOUT

This document describes how to use the LX7180A Evaluation Board as a development tool. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the LX7180A Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get started with the LX7180A Evaluation Board and a description of each function.
• Chapter 3. “GUI Installation and Operation” – Includes instructions on how to install the Graphical User Interface (GUI).
• Chapter 4. "GUI Description" – Describes the items in the GUI.
• Appendix A. “Schematic and Layouts” – Shows the schematic and PCB layout for the LX7180A Evaluation Board.
• Appendix B. “Bill of Materials” – Lists the parts used to build the LX7180A Evaluation Board.
• Appendix C. "LX7180A Control Register Bit Definition" – Describes the internal registers.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples
Arial font:
Italic characters Referenced books	MPLAB	^ IDE User's Guide
	Emphasized text ...is the only compiler...
Initial caps A window the Output	window
	A dialog the Settings dialog
	A menu selection select Enable Programmer
Quotes A field name in a window	ordialog	"Save project before build"
Underlined, italic text with right angle bracket	A menu path File>Save	——
Bold characters A dialog button	Click OK
	A tab	Click the Power tab
N'Rnnnn	A number in verilog format, where N is the total number of digits, R is the radix and n is a digit.	4'b0010, 2'hF1
Text in angle brackets <>	A key on the keyboard	Press,,
Courier New font:
Plain Courier New	Sample source code	#define START
	Filenames	autoexec.bat
	File paths	c:\mccl8\h
	Keywords	_asm, _endasm, static
	Command-line options	-0pa+, -0pa-
	Bit values	0, 1
	Constants	0xFF, 'A'
Italic Courier New	A variable argument	file.o, where file can be any valid filename
Square brackets []	Optional arguments	mccl8 [options] file [options]
Curly brackets and pipe character: { | }	Choice of mutually exclusive arguments; an OR selection	errorlevel {0|1}
Ellipses...	Replaces repeated text	var_name [, var_name...]
	Represents code supplied by user	void main (void) { ... }

RECOMMENDED READING

This user's guide describes how to use the LX7180A Evaluation Board. Another useful document is the following Microchip document listed below, which is available and recommended as a supplemental reference resource:

- LX7180A Data Sheet – "4A Step-Down Regulator"

THE MICROCHIP WEBSITE

Microchip provides online support via our website at www.microchip.com. This website is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the website contains the following information:

• Product Support – Data sheets and errata, application notes and sample programs, design resources, user's guides and hardware support documents, latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative
- Local Sales Office
• Field Application Engineer (FAE)
- Technical Support

Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through the website at: https://www.microchip.com/support

DOCUMENT REVISION HISTORY

Revision B (May 2024)

- Correcting the header/footer misalignment on the horizontal page for the Board Schematic in this user guide.

Revision A (November 2023)

- Initial release of this document.

NOTES:

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the LX7180A Evaluation Board and covers the following topics:

• LX7180A Short Overview
• What is the LX7180A Evaluation Board?
- Contents of the LX7180A Evaluation Board Kit

1.2 LX7180A SHORT OVERVIEW

The LX7180A is a 4A step-down regulator with integrated MOSFETs, packaged in a space-saving 2 mm × 2 mm QFN12, for today's mobile devices. It uses an ultra-fast, constant frequency hysteretic control method to minimize external filter components while maintaining excellent regulation. The LX7180A reference voltage is programmable from 0.6V to 1.195V through a high-speed (up to 3.4 MHz), bidirectional I²C bus.

The LX7180A operates from 3V to 5.5V rails and outputs 0.6V to 100% of the input voltage.

Cycle-by-cycle current limiting protects against over-current conditions. Hiccup mode provides protection for heavy over-load or short-circuit faults. Thermal protection shuts down the regulator under over-temperature conditions. Over-voltage conditions will immediately shut off the output to protect against permanent damage. The LX7180A automatically restarts when all fault conditions are cleared.

The scope of this evaluation board is to demonstrate the features of the LX7180A product.

VIN 3V to 5.5V GND CIN1 CIN2 10 µF 10 µF EN 8 EN LX7180A SW 2,11 L 0.47 µH FB 7 SCL 6 SDA 5 PG PGND AGND 3,12 4 PGOOD

FIGURE 1-1: Typical LX7180A Buck Converter Application @ 0.6V Output.

1.3 WHAT IS THE LX7180A EVALUATION BOARD?

The LX7180A Evaluation Board is used to evaluate Microchip's Technology LX7180A product. The input voltage range for a typical 0.6V output application is 3V-5.5V and the load current can go up to 4A.

1.4 CONTENTS OF THE LX7180A EVALUATION BOARD KIT

The LX7180A Evaluation Board kit includes:

• LX7180A Evaluation Board (EV17U26A)
- Important Information Sheet

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The LX7180A operates from 3V to 5.5V rails, outputs 0.6V to 100% of the input voltage and can deliver an output current of up to 4A. Using the I ^2 C interface, V OUT can be adjusted between 0.6V and 1.195V. The reference voltage is programmed with the I ^2 C bus VSEL register value. In case a higher output voltage is needed, it must be programmed through an external resistive divider; the regulated voltage (V OUT ) should be lower than the input voltage (V _IN ).

VIN GND C8 47 μF DNP C1 C2 10 μF 10 μF R2 100 kΩ PVIN SW EN LX7180A FB SCL SDA PG PGND AGND 3,12 5 7 8 9 PGOOD R3 100 kΩ DNP R1 510 kΩ Switch R8 6Ω R11 2.2 kΩ R10 2.2 kΩ VDD VUSB GP0 2/3 GP1 7/8 GP2 8/8 D- D+ MCP2221A RST UART RX UART TX VSS SDA SCL 10 11 12 13 14 15 16 VBUS C9 0.1 μF C10 0.47 μF Note: The "DNP" marked components are optional and can be used for different configurations. Check the LX7180A Data Sheet for more information.

FIGURE 2-1: Typical LX7180A Step-Down Converter Application @ 0.6V Output and MCP2221A for I²C Communication.

2.2 FEATURES

The LX7180A Evaluation Board has the following features:

• Input Voltage Range (V _IN ): 3V - 5.5V (transients of up to 6.5V, for short durations)
• Output Voltage: 0.6V
• Output Current: typically, 4A @ 0.6V Output, 5V Input
• Power Save Mode (PSM) can be selected to improve light load efficiency
• PWM Switching Frequency: 1.65 MHz
  • Hysteretic Control offers best transient response
  • 100% Duty Ratio Operation
• Input Under Voltage and Over Voltage Protection
• Enable and Power Good Function
• I ^2 C Serial Interface at 3.4 Mbps
• Internal Soft Start
  • Cycle-by-Cycle Over Current Protection
• Hiccup Mode protects against short circuit faults
• Seven Bit Adjustable Reference Voltage via I ^2 C Bus
• Overtemperature Protection (if the die temperature exceeds 150^ , with 25^ hysteresis)
• Ro-HS Compliant

2.3 GETTING STARTED

The LX7180A Evaluation Board is fully assembled and tested to evaluate and demonstrate the features of LX7180A. This board requires the use of an external laboratory power supply and load. For I ^2 C operation, the I ^2 C Monitor GUI can be used (for more details, see Chapter 3. “GUI Installation and Operation” and Chapter 4. “GUI Description”).

2.3.1 Power Input and Output Connection

2.3.1.1 POWERING THE LX7180A EVALUATION BOARD

The Evaluation Board provides a typical circuit application for a 0.6V output, used to evaluate the LX7180A product.

The switch peak current limit will provide a safe maximum current value. The maximum output current for the converter will vary with input and output voltage. Refer to the LX7180A Data Sheet for more information on the maximum output current.

2.3.1.2 BOARD POWER-UP PROCEDURE

For the power-up procedure, follow the steps bellow:

1. Connect the power supply to the input terminals of the evaluation board. The input voltage should be higher than V_OUT , but it should not exceed the Absolute Maximum Rating specified in the Data Sheet. Connect the load to VOUT and GND terminals; maximum load varies with input and output voltage (see the LX7180A Data Sheet for more information on the maximum load). Connect the (+) side of the load to VOUT terminal and the (-) side of the load to GND terminal of the board, see Figure 2-2.
2. Connect the board to the PC, using a USB to Micro USB Cable.
3. To change the Mode of operation, to enable/disable the Input Overvoltage Protection and other features of the part, use the I²C Monitor GUI (for more details, see Chapter 3. "GUI Installation and Operation" and Chapter 4. "GUI Description"). By default, the EN pin is pulled high through a resistor. In addition

to the EN pin, the regulator can be enabled and disabled through the I²C bus, by programming the control register. During disable, the regulator and most of the support circuitry is turned off. However, the I²C bus circuitry is still active and may be programmed.

1. After the power supply is turned on, a voltmeter can be used to monitor V OUT. The measured output voltage should be 0.6V. Adjusting the input voltage and load should not cause the output to vary more than a few mV over the operating range of the converter.

LX7180A Evaluation Board EV17U26A Power Supply V-Meter A-Meter USB-to-Micro-USB Cable GND VIN_S GND_S VOUT_S VOUT V-Meter Electronic/Resistive Load MICROCHIP ✓ UK CA 30° CE

FIGURE 2-2: LX7180A Evaluation Board Test Setup.

2.3.1.3 ADJUSTABLE V OUT SETTING

Using the I ^2 C interface, the output voltage can be adjusted from 0.6V to 1.195V. The reference voltage is programmed with the I ^2 C bus VSEL register value.

EQUATION 2-1: V REF PROGRAMMING WITH THE I²C BUS VSEL REGISTER

$$ V _ {R E F} = 0. 6 V \text {V} + _ {S E L} \times 0. 0 0 4 7 V $$

Where:

V_SEL = the decimal value of the 7 VSEL bits.

In case a higher output voltage is needed, it must be programmed through an external resistive divider. The following formula calculates the value of V_OUT based on the resistive divider components R_TOP and R_BOT .

EQUATION 2-2: OUTPUT VOLTAGE CALCULATION

$$ V _ {O U T} \quad V _ {R E F} \times = (1 \quad \frac {R _ {T O P}}{R _ {B O T}} +) $$

Where:

V_REF default is determined by the chip (0.6V and 0.9V options available).

Note: Check the LX7180A Data Sheet for the Recommended Output Filter Components table.

2.3.1.4 PERFORMANCE EVALUATION

FIGURE 2-3: LX7180A, Efficiency @ V OUT = 0.6V, VIN = 5V, L = 1 μH, C_OUT = 3 x 2 2 μF.

FIGURE 2-4: LX7180A, Load Step Response, I LOAD = 2A to 4A, L = 0.47 μH, COUT = 22 μF.

FIGURE 2-5: LX7180A, Load Step Response, I LOAD = 2A to 4A, L = 0.47 μH, COUT = 2 2 μF, Rising Edge.

FIGURE 2-6: LX7180A, Load Step Response, I LOAD = 2A to 4A, L = 0.47 μH, COUT = 2.2 μF, Falling Edge.

FIGURE 2-7: LX7180A, Start-Up with Enable Pin Toggled, L = 0.47 H , C_OUT = 22 F .

2.3.1.5 I ^2 C PULL-UP VOLTAGE SELECTION

The LX7180A Evaluation Board is equipped with a jumper (JP2) for selecting the I^2C pull-up supply voltage. The J2 header can be used to select the I^2C pull-up voltage to either V_BUS or V_IN . If a different pull-up voltage is desired, it can be injected into the v+ pin of J2. In this case, make sure that no jumper is installed on header J2, to prevent shorting the externally injected pull-up voltage to either V_BUS or V_IN .

Chapter 3. GUI Installation and Operation

3.1 GETTING STARTED

In order to install, use and evaluate the product, several software and hardware tools are required.

3.1.1 Required Software

• I ^2 C Monitor GUI (minimum v.7.0.0.0)
• Micr®.NET Framework 4.5 or higher

3.1.2 Required Hardware

• LX7180A Evaluation Board
• USB-to-micro-USB Cable

3.2 GRAPHICAL USER INTERFACE (GUI) INSTALLATION

The following steps describe how to install the I ^2 C Monitor GUI:

1. If Microsoft ^ .NET Framework is already installed, go to Step 2. If not, download Microsoft ^ .NET Framework from www.microsoft.com and follow the installation instructions.
2. Download the I ^2 C Monitor GUI (v.7.0.0.0) archive from www.microchip.com/LX7180A under "Embedded Software".
3. Unzip the I ^2 C Monitor GUI archive, which contains the setup.exe file.
4. Double click the setup.exe file to open the Setup Wizard window and wait for the extraction to complete. If required, the installation can be stopped by pressing the Cancel button.
5. In the Welcome to the I ^2 C Monitor Setup Wizard window, click the Next button to start the installation.

I2C Monitor

Welcome to the I2C Monitor Setup Wizard

MICROCHIP

The installer will guide you through the steps required to install I2C Monitor on your computer.

WARNING: This computer program is protected by copyright law and international treaties. Unauthorized duplication or distribution of this program, or any portion of it, may result in severe civil or criminal penalties, and will be prosecuted to the maximum extent possible under the law.

< Back

Next>

Cancel

FIGURE 3-1: Starting the I ^2 C Monitor GUI Installation.

1. Read the Software License Agreement, check the box for agreement, then click the Next button.

12C Monitor

License Agreement

MICROCHIP

Please take a moment to read the license agreement now. If you accept the terms below, click "I Agree", then "Next". Otherwise click "Cancel".

12CMonitor License Agreement

I2CMonitor Graphical User Interface Tool

Software License Agreement:

The software supplied herewith by Microchip Technology Incorporated (the "Company") for its products is intended and supplied to you, the Company's customer, for use solely and exclusively on Microchip

I Do Not Agree

Agree

m = 311

Next>

Cancel

FIGURE 3-2: License Agreement.

1. The installation path can be changed, although it is recommended to keep the default path. Click Next to continue.

I2C Monitor Select Installation Folder The installer will install I2C Monitor to the following folder. To install in this folder, click "Next". To install to a different folder, enter it below or click "Browse". Folder: C:\Program Files (x86)\Microchip\I2CMonitorGUI\ Browse... Disk Cost... Install I2C Monitor for yourself, or for anyone who uses this computer: Everyone Just me < Back Next > Cancel

FIGURE 3-3: Selecting the Destination Folder.

1. To confirm installation, click the Next button to start the installation.

I2C Monitor Confirm Installation The installer is ready to install I2C Monitor on your computer. Click "Next" to start the installation. < Back Next > Cancel

FIGURE 3-4: Confirm Installation.

1. In the Installing I ^2 C Monitor window, the progress can be observed.

I2C Monitor Installing I2C Monitor I2C Monitor is being installed. Please wait... < Back Next > Cancel MICROCHIP

FIGURE 3-5: Installing the I ^2 C Monitor GUI.

1. Once the installation is complete, click Close to end the installation. To start the GUI, either click the desktop icon or browse for "I²C Monitor" in the Windows Search bar.

I2C Monitor Installation Complete I2C Monitor has been successfully installed. Click "Close" to exit. Please use Windows Update to check for any critical updates to the .NET Framework. < Back Close Cancel

FIGURE 3-6: The Installation Complete Window.

Chapter 4. GUI Description

4.1 INTRODUCTION

This chapter describes how to operate the I²C Monitor GUI, using the LX7180A Evaluation Board included in the kit.

NOTICE

This chapter provides information regarding the use of the GUI that applies only for the LX7180A device. For other devices using the I²C Monitor GUI, refer to their specific Data Sheets and User's Guides.

Device Menu I²C Monitor Status and Control Bar I²C Generic and Register View Device File Settings About Address 0/0s Connector MCP222x-1-EV17U26APlexA7 ScanAdd Connect Disconnect Voltage V Rate 400 kHz Pullups OPERATION Register Rx 00 Read Write Read All Write All Read Modified Write Modified Number of Registers 5 Address Size 0.0 Update Address (How) 00 01 02 03 04 Data (How) 08 05 2F 28 08 Reset to Default Register Settings Options Regulator Enabled Power Sense Mode Input Over Voltage Protection Output Discharge 45 ms Power Good Delay Power Good Detect Reduced Switch Node Base Filter Output Voltage 0.6000 V Slew Rate 5 mV/μs Resistive Divider Fast Remiter 1 kΩ Batter Remiter 1 kΩ Vaser Voltage 0.6000 V Target Voltage Target Output Voltage 0.6000 V Slew Rate 5 mV/μs Target Voltage 0.6000 V Allowed range for Target Output Voltage: 0.6000V~1.156V Reverse (Output >Target) Read Write Start Status Non latched Latched Power Good OK Over Current Enabled Over Temperature Feedback Under Voltage Lockout Clear Faults Status Bar LX7180A fC Diagnostic Progress Bar STATUS Connected

FIGURE 4-1: I ^2 C Monitor GUI Main Window - LX7180A View.

4.2 THE GRAPHICAL USER INTERFACE (GUI)

The following sections describe the items depicted in the GUI.

4.2.1 Device Menu

The Device drop-down menu allows the user to select the device to be evaluated. If an evaluation (or added custom) board is used, the profile will automatically change to the preselected profile.

4.2.2 File Menu

The File menu allows the user to save (Save registers to file) the registers of the currently selected device to a file that can then be loaded into the GUI, by using the Load registers from file button. The saved file can also be edited (open it with a text editor).

File Settings About Load registers from file Save registers to file

FIGURE 4-2: File Menu.

4.2.3 Settings Menu

From the Settings menu, add a new custom board to be automatically detected and switch to its profile. To do this, go to Settings>Device descriptors and in the Descriptors window, add the desired "Board" descriptor and select the desired "Device" profile.

Descriptors Board descriptor Device profile Built-in ADM00811 MIC7400 Built-in ADM00812 MIC7400 Built-in ADM00754 MIC24045 Built-in ADM00826 MIC24045 Built-in ADM00836 MIC23656 Built-in ADM00831 MIC23356 Built-in DT100108 MIC33M656 Built-in ADM00855 MIC33M356 Built-in ADM00856 MIC23156 Built-in DT100105 MCP16502 Built-in EV17U26A LX7180A Custom Delete selected rows Save Cancel

FIGURE 4-3: Custom Board Menu.

4.2.4 I ^2 C Monitor Status and Control Bar

The "Status and Control" bar contains the items listed in Table 4-1.

Add Base Connector MCP222X-1-EV17U26ARevA1 ScanAdd Connect Disconnect Voltage V Rate 400 kHz Pullups

FIGURE 4-4: I ^2 C Monitor Status and Control Bar.

TABLE 4-1: MONITOR STATUS AND CONTROL BAR

Item Description
Addr This drop-down menu shows the address of the available devices.
Connector This drop-down menu shows the type of connector used to bridge the board.
ScanAddr This button is used to scan for a valid address.
Connect/Disconnect	These buttons are used to connect/disconnect the current selected device.
Voltage Not applicable.
Rate	This drop-down menu is used to select the corresponding communication rate for the device.
Pull Ups	Not applicable.

In the “Status and Control” bar, the user can choose the hardware tool for the communication with the device and the settings it should allow.

In order to connect to a device, the user must follow the steps described in

Section 3.1 "Getting Started". After connecting the Micro-USB cable, the user must scan for a valid address. Once a valid address is detected, clicking the Connect button will initialize the connection with the device and the registers will be available for read and write operations.

4.2.5 I ^2 C Generic Register View

The “I ^2 C Generic Register View” area contains the items listed in Table 4-2. This section of the I ^2 C Monitor GUI is common for any evaluated device.

OPERATION Register 0k/00 Read Write Read All Write All Read Modified Write Modified Number of Registers: 5 Address Size: 8bit Update Address (Hex) 00 01 02 03 04 Data (Hex) 08 80 2F 28 0B

FIGURE 4-5: Generic Register View Area.

TABLE 4-2: I ^2 C GENERIC REGISTER VIEW ITEMS

Panel	Item	Description
Operation	Register	This section shows the registers available for read/write operations.
	Read/Write	These buttons are used for single read/write operations.
	Read All/Write All	These buttons are used for reading/writing all the available registers.
	Read Modified/Write Modified	These buttons are used for reading/writing the content of the modified registers.
	Number of Registers	In this section, the user can set the number of the available registers for read/write operations.
	Address Size	In this section, the Address Size is specified.
	Update	This button sets the number of available registers for read/write operations in the register area.
Register Area		This section shows the current status of the registers address and their content.

The specific registers for LX7180A are described in Appendix C. "LX7180A Control Register Bit Definition".

4.2.6 LX7180A I ^2 C Programmable Features

The LX7180A I²C "Programmable Features" area contains the items listed in Table 4-3.

Reset to Default Register Settings Options ✓ Regulator Enabled ☐ Power Save Mode ✓ Input Over Voltage Protection ☐ Output Discharge ☐ 45 ms Power Good Delay ✓ Power Good Detect ☐ Reduced Switch Node Rise Rate Output Voltage Output Voltage 0.6000 V Slew Rate 5 mV/µs ☐ Resistive Divider Top Resistor 1 kΩ Bottom Resistor 1 kΩ VREF Voltage 0.6000 V Read Write Target Voltage Target Output Voltage 0.6000 V Slew Rate 5 mV/µs Target VREF Voltage 0.6000 V Allowed range for Target Output Voltage: 0.6000V - 1.1969V ☐ Reverse (Output->Target) Start Status Non-latched Power Good OK Enabled Latched Over Current Over Temperature Feedback Under Voltage Lockout Clear Faults Read Write

FIGURE 4-6: LX7180A I ^2 C Programmable Features, Resistive Divider Disabled.

Reset to Default Register Settings Options ✓ Regulator Enabled □ Power Save Mode ✓ Input Over Voltage Protection □ Output Discharge □ 45 ms Power Good Delay ✓ Power Good Detect □ Reduced Switch Node Rise Rate Output Voltage Output Voltage 1.8000 V Slew Rate 5 mV/μs ✓ Resistive Divider Top Resistor 240 kΩ Bottom Resistor 120 kΩ VREF Voltage 0.6000 V Read Write Target Voltage Target Output Voltage 3.3 V Slew Rate 5 mV/μs Target VREF Voltage 1.0982 V Allowed range for Target Output Voltage: 1.8000V - 3.5907V Reverse (Output->Target) Start Status Non-latched Power Good OK Enabled Latched Over Current Over Temperature Feedback Under Voltage Lockout Clear Faults Read Write

FIGURE 4-7: LX7180A I ^2 C Programmable Features, Resistive Divider Enabled.

TABLE 4-3: LX7180A I ^2 C PROGRAMMABLE FEATURES

Panel/Button Items Description
Options Regulator	Enabled	This check box allows to enable/disable the regulator via the I^2C bus. Uncheck the box to disable the regulator. During disable, the regulator and most of the support circuitry is turned off; however, the I^2C bus circuitry is still active and may be programmed.
	Power Save Mode This check box allows the switch between auto PSM mode and PWM only mode. Check the box for enabling the Power Save Mode, uncheck the box for PWM only mode.
	Input Overvoltage Protection	This check box allows to enable/disable the Input Overvoltage Protection. If the box is checked, when the Over Voltage Rising Threshold (see LX7180A Data Sheet, Electrical Characteristics table) is exceeded, the output is immediately shut off to protect against permanent damage. If the box is unchecked, the device will continue to operate even after the Over Voltage Rising Threshold is exceeded.
	Output Discharge This check box allows the user to configure the Output Discharge option. If the box is checked, when the regulator is disabled, the output voltage is discharged through the SW pin.
	45 ms Power Good Delay This check box controls the Power Good Delay. If checked, it will introduce a 45 ms delay on PGOOD.
	Power Good Detect This check box allows the Power Good detection configuration. If checked, PGOOD will detect both a positive and a negative excursion of V_OUT from the reference. If unchecked, PGOOD senses only a negative excursion of V_OUT from the reference.
	Reduced Switch Node Rise Rate	This check box allows the user to select between Reduced and Normal Switch Node Rise Rate. If the box is checked, then the Reduced Switch Node Rise Rate is enabled.
	Read/Write	These buttons are used to read/write the registers that contain the information described above.
Output Voltage	Output Voltage	This box allows the setting of the output voltage. If the Resistive Divider box is unchecked, then the allowed V_OUT range is 0.6V-1.1969V. If the Resistive Divider option is enabled, the V_OUT range can be extended to 5.5V.
	Slew Rate	This box contains a drop-down list with all possible slew rate settings.
	Resistive Divider	This check box enables/disables the resistive divider configuration. If the box is checked, the Top Resistor and Bottom Resistor fields become active and it is requested to fill in the configured values on the hardware.
	V_REF Voltage	This spin box displays the resulting V_REF Voltage.
	Error Message	In this area, an error message is displayed if the entered V_OUT value is not valid.
	Read/Write	These buttons are used to read/write the registers that contain the information described above.
Target Voltage	Target Output Voltage	This box allows setting the target output voltage for V_OUT transitions. If the Resistive Divider is unchecked, then the allowed target V_OUT range is 0.6V-1.1969V. If the Resistive Divider option is checked, then the target V_OUT range can be extended to 5.5V. Depending on the hardware-configured resistive divider, information about the permitted target V_OUT range is provided in the message area.
	Slew Rate This box contains a drop-down list with all possible slew rate settings.
	Target V_REF Voltage This spin box displays the resulting Target V REF Voltage.
	Info/Error Message This area p provides information about the allowed target V OUT range. If an invalid value is set, then an Out of range! message is displayed.
	Reverse (Output ->Target) If V OUT is already set to the Target Output Voltage value and the box is checked, when the Start button is pressed, V_OUT will return to the Output Voltage value.If V_OUT is set to the Output Voltage value and the box is checked, when the Start button is pressed, V_OUT will transition to the Target Output Voltage value and after approximately 80 ms, it will return to the Output Voltage value, see Figure 4-8 (case 3).
	Start	When this button is pressed, a transition from the Output Voltage to the Target Output Voltage starts, see Figure 4-8 (case 1). If the Reverse (Output ->Target) is checked, then a transition from the Target Output Voltage to the Output Voltage occurs, see Figure 4-8 (case 2).
Reset to Default Register Settings		When this button is pressed, the registers are set to their default values. Check Appendix C. “LX7180A Control Register Bit Definition”.

This area of the GUI allows the user to modify the device features. For additional information on the part, refer to the Data Sheet.

FIGURE 4-8: Output Voltage Transitions.

4.2.7 LX7180A I ^2 C Diagnostic

The LX7180A Diagnostic area contains the items listed in Table 4-4.

Status Non-latched Power Good OK Enabled Latched Over Current Over Temperature Feedback Under Voltage Lockout Clear Faults

FIGURE 4-9: LX7180A I ^2 C Diagnostic Area.

TABLE 4-4: LX7180A I ^2 C DIAGNOSTIC AREA

Panel Items Description
Status	Power Good OK	This box indicates green if the output voltage has reached 90% of its set value. It indicates red when the output voltage is in transition or the regulator is disabled.
	Enabled This box indicates green if the regulator is enabled. When the Regulator Enabled box is unchecked, the Enabled box indicates red.
	Over Current This box indicates red if the over current limit is reached and it is latched to '1'. Press Clear Faults button to reset the status flag.
	Over Temperature This box indicates red if an over temperature event occurs and it is latched to '1'. Press Clear Faults button to reset the status flag.
	Feedback Under Voltage Lockout	This box indicates red if a feedback under voltage event occurs and it is latched to '1'. Press Clear Faults button to reset the status flag.

The LX7180A I²C Diagnostic area summarizes the information contained in the "Status" section. The "Status" section contains latched (Flag) or non-latched (Status) bits. Flag bits are set when the corresponding Fault condition occurs and do not return to zero once the Fault condition ceases. If such a fault occurs, the user can clear the faults by pressing the Clear Faults button or by power cycling the device. Status bits are set when the corresponding Fault condition has occurred and return to '1' automatically once the Fault condition has ceased. This information is refreshed once every two seconds.

TABLE 4-5: STATUS BAR ITEMS

Item	Description
Status Label	The status label shows if there is any device connected to the board. Refer to Table 4-6 for a list of possible labels.
Progress Bar	This bar shows the progress for a given command.

TABLE 4-6: STATUS LABLES

Item	Description
STATUS: Connected!	This message is shown when the GUI gets connected to a device.
STATUS: Disconnected!	This message is shown when the GUI gets disconnected from a device.

NOTES:

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematic and layouts for the LX7180A Evaluation Board:

• Board – Schematic
• Board – Top Copper and Silk Layer
• Board – Signal Layer 1
• Board – Signal Layer 2
• Board – Bottom Copper and Silk

A.2 BOARD - SCHEMATIC

0.5mm VIN_SENSE NT1 TP LOOP Red Net Tie VIN TP Turret GNDI_SENSE NT2 TP LOOP Black GNDI TP Turret 0.5mm VOUT_SENSE TP LOOP Red VOUT TP Turret 0.5mm NT3 Net Tie VOUT_SENSE TP LOOP Red VOUT TP Turret 0.5mm J3 VBUS 1 VBUS D-DM DP ID 2 1 GND 5 USB 1.0 MICRO-B FEMALE GND GND GND C9 0.1uF 16V 0603 R8 0R 0603 C10 0.47uF 16V 0603 GND U2 VDD GP0 2 VUSB GP1 2 D- GP2 2 RS1 4 VSS SCL 9 MCP2221A 10 UART RX 4 UART TX 6 UART RX 5 UART TX 4 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 13 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 12 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 11 DP 10 DP 10 DP 10 DP 10 DP 10 DP 10 DP 10 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 9 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 8 DP 7 DNP R9 R8 RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQ HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-20CLQA HDN RD NPN PGN RD LXTBGA-254MALE x1x3 HDN RD NPN PGN RD LXTBGA-254MALE x1x3 HDN RD NPN PGN RD LXTBGA-254MALE x1x3 HDN RD NPN PGN RD LXTBGA-254MALE x1x3 HDN RD NPN PGN RD LXTBGA-254MALE x1x3 HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NPN PGN RD LXTBQA HDN RD NOPTENSE TP LOOP Black TP LOOP Black TP Turret GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI GNDI BPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DPMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMG DFMK C8 C7 C6 C5 C4 C3 C2 C1 C0 C9 C7 C5 C3 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C4 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C4 C7 C5 C3 C2 C1 C0 C7 C5 C3 C2 C1 C4 C7 C5 C3 C2 C1 C4 C7 C5 C3 C2 C1 C4 C7 C5 C3 C2 C1 C4 A M M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M S U M USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USU USM XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX XUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YUSX YOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOSLYOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOOLIOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOLOOMS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OMS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OLS OMS OFS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOC AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS AOS A OSA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMA BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB BOMB EOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOG HOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGHOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HOGT HLOG TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TET TATMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMTCMCCMPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCPCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCPTCCCFTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTGCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTACTCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCAACCATCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGCGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttcttccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgccgaacccagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagcagdcaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggccaaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccaacccaggcccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccgaacccccagaaccgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcgcccgcccgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttcgttttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgcttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgacttgttgactTGAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGT AAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGTAAATTGP

A.3 BOARD – TOP COPPER AND SILK LAYER

LX7180A Evaluation Board EV17U25A SMD R13 SDA GND SCL R12 J1 VIN V+ VBUS C9 J2 VOUT SM6 SM4 SM3 C10 UR11 R8 V+

A.4 BOARD - SIGNAL LAYER 1

Green circuit board layout with scattered gray circular elements and dot patterns (no text or symbols)

A.5 BOARD - SIGNAL LAYER 2

graph TD
    A["Start"] --> B{Decision}
    B -->|Yes| C["Node 1"]
    B -->|No| D["Node 2"]
    C --> E["End"]
    D --> F["End"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#ffc,stroke:#333
    style F fill:#fcc,stroke:#333

A.6 BOARD – BOTTOM COPPER AND SILK

Blue background with scattered gray dots and a white circuit board pattern (no text or symbols)

Appendix B. Bill of Materials

TABLE B-1: BILL OF MATERIALS (BOM)

Qty	Reference Description	Option Manufacturer Part Number
2	C 1 , C	Capacitor, Ceramic, 10 μF, 16V, 10%, X7R, SMD, 1206	Kyocera AVX 1206YC106KAT2A
1	C3	Capacitor, Ceramic, 22 μF, 16V, 20%, X7R, SMD, 1206	Taiyo Yuden Co., Ltd. EMK316BB7226ML-T
1	C9	Capacitor, Ceramic, 0.1 μF, 16V, 10%, X7R, SMD, 0603	Taiyo Yuden Co., Ltd. EMK107B7104KA-T
1	C10	Capacitor, Ceramic, 0.47 μF, 16V, 10%, X7R, SMD, 0603	Murata Manufacturing Co., Ltd.
2 EN, PG Test Point,		LOOP, Orange, TH	Keystone® Electronics Corp.	5003
4	GNDI, GNDO, VIN, VOUT	Test Point, PIN Tin, TH	Harwin Plc.	H2121-01
2	GNDI_SENSE, GNDO_SENSE	Test Point, Multi Purpose, Mini Black	Keystone® Electronics Corp.	5001
2	J 1 , J	Connector, Header, 2.54 mm, Male, 1x3 Tin, 5.84 MH, TH, VERT	Samtec, Inc.	TSW-103-07-T-S
1	J3	Connector, USB 2.0, Micro-B, Female, SMD	Amphenol ICC (FCI)	10118192-0001LF
1	JP2	Mechanical HW Jumper, 2.54 mm, 1x2	Amphenol ICC (FCI)	63429-202LF
1	L1	Inductor, 470 nH, 12.2A, 20%, SMD	Vishay Intertechnology, Inc.	IHLP2020CZERR47M01
4	PAD1, PAD2, PAD3, PAD4	Mechanical HW Rubber Pad, BumponTM Hemisphere, 0.44" x 0.20", Black	3M	SJ-5003 (BLACK)
1	R1	Resistor, TKF, 510 kΩ, 1%, 1/10W, SMD, 0603	Panasonic® - ECG	ERJ-3EKF5103V
1	R2	Resistor, TF, 100 kΩ, 1%, 1/8W, SMD, 0603	Vishay Intertechnology, Inc.	MCT06030C1003FP500
4	R8, R12, R13, RT	Resistor, TKF, 0Ω, 1/10W, SMD, 0603	Panasonic® - ECG	ERJ-3GEY0R00V
2 R10, R11		Resistor, TF, 2.2 kΩ, 1%, 1/8W, SMD, 0603	Vishay Intertechnology, Inc.	MCT06030C2201FP500
3	SW, VIN_SENSE, VOUT_SENSE	Test Point, Multi Purpose, Mini, Red	Keystone® Electronics Corp.	5000
1	PCB	LX7180A Evaluation Board - Printed Circuit Board	—	04-11729

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

TABLE B-2: BILL OF MATERIALS (BOM) – MICROCHIP PARTS

Qty	Reference Description	Manufacturer Part Number
1	U1	Analog Switcher Buck, 5.5V to 0.6V, QFN-12	Microchip Technology Inc. LX7	180A-20CLQ-TR
1	U2	Interface, USB I ^2 C UART, MCP2221A-I/ST, TSSOP-14	Microchip Technology Inc. MCP	P2221A-I/ST

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

TABLE B-3: BILL OF MATERIALS (BOM) – DO NOT POPULATE PARTS

Qty	Reference Description	Manufacturer Part Number
3 C	4, C5, C6	Capacitor, Ceramic, 22 μF, 16V, 20%, X7R, SMD, 1206	Taiyo Yuden Co., Ltd. EMK316	BB7226ML-T
1	C8	Capacitor, Aluminum, 47 μF, 25V, 20%, SMD F	Panasonic®- ECG ECE-V1HA	470UP
1	CF	Capacitor, Ceramic, 6.8 pF, 100V, 5%, C0G, SMD, 0603	Kyocera AVX 06031A6R8JAT2A
1	R3	Resistor, TF, 100 kΩ,1%, 1/8W, SMD, 0603	Vishay Intertechnology, Inc. M	CT06030C1003FP500
1	R9	Resistor, TKF, 0Ω, 1/10W, SMD, 0603	Panasonic®- ECG ERJ-3GEY	0R00V
1	RB	Resistor, TKF, 240 kΩ, 1%, 1/10W, SMD, 0603	Panasonic®- ECG ERJ-3EKF	2403V

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM used in manufacturing uses all RoHS-compliant components.

Appendix C. LX7180A Control Register Bit Definition

TABLE C-1: LX7180A CONTROL REGISTER BIT DEFINITION

Bit Name Value Description
Status, Address 00h
7:3 Reserved
2	OCP	0-d	Latched to 1 if the over current limit is reached. Write a '1' to reset the status flag.
1	OTP	0-d	Latched to 1 if an over temperature event occurs. Write a '1' to reset the status flag.
0	FB_UVLO	0-d	Latched to 1 if a FB_UVLO event occurs. Write a '1' to reset the status flag.
VSEL, Address 01h, (aka dac)
7	EN	1-d Device enabled.
		0 Device disabled.
6:0	VSEL[6:0]		7-bit DAC value to set V_REF . The default value is 0.6V.
Ctrl1, Address 02h, (aka reg2)
7:6 Reserved 00-d
5	DLY_DIS	1-d	45 ms delay on PGOOD is disabled when this bit is high.
4	ctrl1	0-d Not used.
3	SW_RATE	1-d Normal high efficiency rise rate.
		0 Reduced switch node rise rate.
2 PG_LOHI		1-d PGOOD will detect both positive and negative excursion of V_OUT from the reference.
		0 PGOOD senses only the negative voltage excursion of V_OUT from the reference.
1	VIN_OVP	1-d When V_IN reaches the Over Voltage Rising Threshold OVP_R , the converter turns off.
		0 V_IN OVP disabled. The Converter will continue to operate.
0	MODE	1-d PWM - Always run in Continuous Conduction Mode.
		0 PSM - Power Save Mode allows the converter to run in Discontinuous Conduction Mode.
Vendor ID, Address 03h (Read Only)
7:4	VID[3:0]	0010	Microchip Vendor ID.
3:2	A1A0	00	Designates the client address version. These bits will correspond to the two LSB.
1:0	VREF	00	Designates the default output voltage version: 0.0 = 0.6 V; 0.1 = 0.9 V.
Ctrl2, Address 04h, (aka reg4)
7:6 Reserved
5	GO	1 Write '1' to this bit to start a V_REF transition.
		0-d The V_OUT is ramped to the default VSEL value.
4	Discharge	1 When the regulator is disabled, the output voltage is discharged through the SW pin.
		0-d When the regulator is disabled, the output voltage is not discharged.
3	PGOK	1 Is high when output is in regulation; read only dynamic signal.
		0 Is low during an output voltage transition; read only dynamic signal.

TABLE C-1: LX7180A CONTROL REGISTER BIT DEFINITION (CONTINUED)

Bit Name Value Description
2:0 SLEW	000 Reserved.
	001 Reserved.
	010 V	REF slews at 2.5 mV/μs.
	011-d V	REF slews at 5 mV/μs; this is the default setting.
	100 V	REF slews at 10 mV/μs.
	101 V	REF slews at 20 mV/μs.
	110 V	REF slews at 40 mV/μs.
	111 Single Step Mode: No slew rate limiting.

Worldwide Sales and Service

AMERICAS

Corporate Office

2355 West Chandler Blvd.

Chandler, AZ 85224-6199

Tel: [phone]

Fax: [phone]

Technical Support:

http://www.microchip.com/

support

Web Address:

www.microchip.com

Atlanta

Duluth, GA

Tel: [phone]

Fax: [phone]

Austin, TX

Tel: [phone]

Boston

Westborough, MA

Tel: [phone]

Fax: [phone]

Chicago

Itasca, IL

Tel: [phone]

Fax: [phone]

Dallas

Addison, TX

Tel: [phone]

Fax: [phone]

Detroit

Novi, MI

Tel: [phone]

Houston, TX

Tel: [phone]

Indianapolis

Noblesville, IN

Tel: [phone]

Fax: [phone]

Tel: [phone]

Los Angeles

Mission Viejo, CA

Tel: [phone]

Fax: [phone]

Tel: [phone]

Raleigh, NC

Tel: [phone]

New York, NY

Tel: [phone]

San Jose, CA

Tel: [phone]

Tel: [phone]

Canada - Toron

Tel: [phone]

Fax: [phone]

ASIA/PACIFIC

Australia - Sydney

Tel: [phone]

China - Beijing

Tel: [phone]

China - Chengdu

Tel: [phone]

China - Chongqing

Tel: [phone]

China - Dongguan

Tel: [phone]

China - Guangzhou

Tel: [phone]

China - Hangzhou

Tel: [phone]

China - Hong Kong SAR

Tel: [phone]

China - Nanjing

Tel: [phone]

China - Qingdao

Tel: [phone]

China - Shanghai

Tel: [phone]

China - Shenyang

Tel: [phone]

China - Shenzhen

Tel: [phone]

China - Suzhou

Tel: [phone]

China - Wuhan

Tel: [phone]

China - Xian

Tel: [phone]

China - Xiamen

Tel: [phone]

China - Zhuhai

Tel: [phone]

ASIA/PACIFIC

India - Bangalore

Tel: [phone]

India - New Delhi

Tel: [phone]

India - Pune

Tel: [phone]

Japan - Osaka

Tel: [phone]

Japan - Tokyo

Tel: [phone]

Korea - Daegu

Tel: [phone]

Korea - Seoul

Tel: [phone]

Malaysia - Kuala Lumpur

Tel: [phone]

Malaysia - Penang

Tel: [phone]

Philippines - Manila

Tel: [phone]

Singapore

Tel: [phone]

Taiwan - Hsin Chu

Tel: [phone]

Taiwan - Kaohsiung

Tel: [phone]

Taiwan - Taipei

Tel: [phone]

Thailand - Bangkok

Tel: [phone]

Tel: [phone]

Fax: [phone]

Denmark - Copenhagen

Tel: [phone]

Fax: [phone]

Finland - Espoo

Tel: [phone]

France - Paris

Tel: [phone]

Fax: [phone]

Germany - Garching

Tel: [phone]

Germany - Haan

Tel: [phone]

Germany - Heilbronn

Tel: [phone]

Germany - Karlsruhe

Tel: [phone]

Germany - Munich

Tel: [phone]

Fax: [phone]

Germany - Rosenheim

Tel: [phone]

Israel - Ra'anana

Tel: [phone]

Italy - Milan

Tel: [phone]

Fax: [phone]

Italy - Padova

Tel: [phone]

Netherlands - Drunen

Tel: [phone]

Fax: [phone]

Norway - Trondheim

Tel: [phone]

Poland - Warsaw

Tel: [phone]

Romania - Bucharest

Tel: [phone]

Spain - Madrid

Tel: [phone]

Fax: [phone]

Sweden - Gothenberg

Tel: [phone]

Sweden - Stockholm

Tel: [phone]

UK - Wokingham

Tel: [phone]

Fax: [phone]