TC1277 - Unspecified Microchip - Free user manual and instructions

USER MANUAL TC1277 Microchip

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Table of Contents

Preface .... 1

Chapter 1. Product Overview....5

1.1 Introduction ...... 5
1.2 What is the Voltage Supervisor SOT23 Evaluation Board ? 5
1.3 What the Voltage Supervisor SOT23 Evaluation Board Kit Includes .... 5

Chapter 2. Installation and Operation .... 7

2.1 Introduction 7
2.2 Features 7
2.3 Getting Started 8
2.4 Voltage Supervisor SOT23 Evaluation Board Description 12
2.5 Evaluating the Device 13

Appendix A. Schematic and Layouts 15

A.1 Introduction 15
A.2 Schematics and PCB Layout 15
A.3 Board Schematic 1 ...... 16
A.4 Board Layout - Top Layer With Silk Screen 17

Appendix B. Bill Of Materials (BOM) 19

Appendix C. Microchip Analog SOT-23 Device Compatibility 21

C.1 Introduction 21
C.2 PCB Compatibility 21
C.3 Ideas on Evaluating An LDO 22

Worldwide Sales and Service 24

Voltage Supervisor SOT23 Evaluation Board User's Guide

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 web site (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.

INTRODUCTION

This chapter contains general information that will be useful to know before using the Voltage Supervisor SOT23 Evaluation Board. Items discussed in this chapter include:

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

DOCUMENT LAYOUT

This document describes how to use the Voltage Supervisor SOT23 Evaluation Board as a development tool. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the Voltage Supervisor SOT23 Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get started with this evaluation board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the Voltage Supervisor SOT23 Evaluation Board.
• Appendix B. "Bill Of Materials (BOM)" – Lists the parts used to build the Voltage Supervisor SOT23 Evaluation Board.
• Appendix C. “Microchip Analog SOT-23 Device Compatibility” – Explains how this board (PCB) may be used with other Microchip Analog devices in the SOT-23-3 package.

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...

RECOMMENDED READING

For more information regarding the Voltage Supervisor and Voltage Detector devices, the specific device data sheet is recommended reading. Table shows the device and associated Data Sheet literature number. These documents can be downloaded from the Microchip web site at: www.microchip.com.

DEVICES AND DATA SHEET LITERATURE NUMBERS

Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site 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
- Development Systems Information Line

Customers should contact their distributor, representative or field application engineer 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 web site at: http://support.microchip.com

DOCUMENT REVISION HISTORY

Revision B (July 2006)

• Add disclaimer to Bill of Materials regarding RoHS-Compliant part numbers
• Removed Appendix D and incorporated information here.

Revision A (September 2004)

- Initial Release of this Document.

Voltage Supervisor SOT23 Evaluation Board User's Guide

NOTES:

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the Voltage Supervisor SOT23 Evaluation Board and covers the following topics:

• What is the Voltage Supervisor SOT23 Evaluation Board?
- What the Voltage Supervisor SOT23 Evaluation Board kit includes

1.2 WHAT IS THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD?

The Voltage Supervisor SOT23 Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology's Voltage Supervisors and Voltage Detectors in the SOT-23-3 (3-pin SOT-23) package.

The Voltage Supervisor SOT23 Evaluation Board PCB supports the four different SOT-23-3 pinouts for the product family. This board has been made generic so that other devices may be supported with this board.

1.3 WHAT THE VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD KIT INCLUDES

This Voltage Supervisor SOT23 Evaluation Board Kit includes:

• Five Voltage Supervisor SOT23 Evaluation Board Printed Circuit Boards (PCBs)

• Five MCP112 device samples (MCP112T-270E/TT) that can be installed on the Voltage Supervisor SOT23 Evaluation Board PCBs

• 2.63V Trip Point (Typical)

• Extended Temperature
• SOT-23-3 Package

- Voltage Supervisor SOT23 Evaluation Board User's Guide (Electronic Version on CD)

- Analog and Interface Products Demonstration Boards CD-ROM (DS21912)

Voltage Supervisor SOT23 Evaluation Board User's Guide

NOTES:

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The blank Printed Circuit Board (PCB) allows the desired voltage supervisor or voltage detector device to be installed along with other desired passive components (resistor and capacitors) and connection posts.

The Voltage Supervisor SOT23 Evaluation Board PCB supports four different SOT-23-3 pinouts. Three of these pinouts are used by the Voltage Supervisor or Voltage Detector product family, while the fourth is used by other Microchip analog products (see Appendix C. "Microchip Analog SOT-23 Device Compatibility"). This board has been made generic so that other devices may be supported with this board. However, the silk screen markings are designed for ease-of-use with the voltage supervisor devices.

2.2 FEATURES

The Voltage Supervisor SOT23 Evaluation Board has the following features:

• Connection terminals may be either through-hole or surface-mount
  • Four SOT-23-3 pinouts supported

• Optional passive components for:

• Power Supply Filtering

• Output Filtering
• Output Pull-up Resistor
• Output Pull-down Resistor
• Output Loading Resistor
• Output Series Resistor

- Silk screen area to write specifics of implemented circuit, such as MCP111, 2.7V, 10 kΩ (to indicate that the device is the MCP111 with the 2.7V trip point and an external 10 kΩ pull-up resistor on the output)

2.3 GETTING STARTED

The Voltage Supervisor SOT23 Evaluation Board is a blank PCB that allows the user to configure the circuit to their exact requirements. The Passive components use the surface mount 805 package layout. Figure 2-1 shows the board circuit. Table 2-1 shows which circuit option needs to be used for a given voltage supervisor/voltage detector. There are currently no voltage supervisors/voltage detectors that use the Option 3 pinout. For other Microchip Analog Devices, please refer to Appendix C. "Microchip Analog SOT-23 Device Compatibility".

FIGURE 2-1: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD SCHEMATIC

Vss VDD C1(1) U1 Option 1 2 1 3 3 U1 Option 2 1 2 3 Pinout not used by voltage supervisors, but other SOT-23-3 devices (such as voltage references) U1 Option 3 1 2 3 U1 Option 4 2 1 3 R1(1) R2(1) R3(1) VOUT C2(1) Note 1: Components C1, C2, R1, R2 and R3 are placed to support different devices and configurations. These components may not be required for some configurations. 2: For Option 1, use: MCP112T-270/NB For Option 2, use: TCM809RVNB713 For Option 3, use: MCP1525 (a VREF) For Option 4, use: MCP100T-270I/TT

TABLE 2-1: VOLTAGE SUPERVISOR / VOLTAGE DETECTOR DEVICES AND EVAL BOARD CIRCUIT/FOOTPRINT OPTION

Device	Supported on	Output Signal (Active State)	Output Type	Comment/Recommended component values
MCP111 Option 1 V		OUT (L) Open-Drain R1 = 100 kΩ
MCP112 Option 1 V		OUT (L) Push-Pull
TC54VC Option 1 V		OUT (L) Push-Pull
TC54VN Option 1 V		OUT (L) Open-Drain R1 = 270Ω
TC51	Option 1	_OUT (L)	Open-Drain	R1 = 47 kΩ
MCP103 Option 2 RST		— (L) Push-Pull
TCM809 Option 2 RESET		— (L) Push-Pull
TCM810 Option 2 RESET (H)		Push-Pull
MCP809 Option 2 RESET		— (L) Push-Pull C1 = 0.1 μF
MCP810 Option 2 RESET		— (L) Push-Pull C1 = 0.1 μF
MCP102 Option 4 RST		— (L) Push-Pull
MCP121 Option 4 RST		— (L) Open-Drain with Internal Pull-up
MCP131 Option 4 RST		— (L) Open-Drain R1 = 100 kΩ
TC1275	Option 4 RESET	— (L) Push-Pull C1 = 0.1 μF
TC1276	Option 4 RESET	— (L) Open-Drain C1 = 0.1 μF		R1 = 47 kΩ
TC1277	Option 4	RESET (H)	Push-Pull	C1 = 0.1 μF
TC1278	Option 4	RESET (H)	Open-Drain	with Internal Pull-up
TC1279	Option 4 RESET	— (L) Open-Drain with Internal Pull-up
TC1272	Option 4 RESET	— (L) Push-Pull C1 = 0.1 μF
TC1272A	Option 4 RESET	— (L) Push-Pull C1 = 0.1 μF
TC1273	Option 4 RESET	— (L) Open-Drain C1 = 0.1 μF		R1 = 47 kΩ
TC1274	Option 4	RESET (H)	Push-Pull	C1 = 0.1 μF
MCP100 Option 4 RESET		— (L) Push-Pull
MCP101 Option 4 RESET (H)		Push-Pull
MCP120 Option 4 RESET		— (L) Open-Drain C1 = 0.1 μF		R1 = 47 kΩ
MCP130 Option 4 RESET		— (L) Open-Drain with Internal Pull-up		C1 = 0.1 μF

2.3.1 The Hardware

Figure 2-2 shows the layout of the Voltage Supervisor SOT23 Evaluation Board. This is a small board (1"x1.2" (25.4 mm x 30.5 mm)) that is single-sided. There are three connection points ( V_DD , V_SS and V_OUT ) that can use either through-hole or surface-mount connector posts. Additionally, a test point is available on the device V_OUT , which may be useful if Resistor R3 is installed.

The different SOT-23-3 layout options are outlined in the diagram below, with Opt 1, Opt 2, Opt 3 and Opt 4 indicating the layout option of that SOT-23-3 footprint.

Resistor R1 is a pull-up resistor that may need to be installed for devices with an open-drain output. Though resistor R2 is not currently required, it was placed for possible future requirements. Resistor R3, too, is not required, but may be useful if this board is to be interfaced into existing circuits. If resistor R3 is to be installed, remember to cut the trace that "shorts out" R3. Capacitors C1 and C2 are bypass capacitors that may be required to be installed, depending on the device selected and the system requirements (such as the noise present on the power supply). Table 2-2 describes the components.

FIGURE 2-2: VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD LAYOUT

Silk-screen area to write specifics of implemented circuit (ex: MCP112, 2.7V to indicate that the device is the MCP112 with the 2.7V trip point).
Test Point: If R3 is installed, signal may be different than V_OUT .

TABLE 2-2: OPTIONAL PASSIVE COMPONENTS

Device Comment

C1 Power Supply Bypass Capacitor

C2 Output Filter Capacitor

R1 Pull-up Resistor

R2 Pull-down Resistor

R3 Inline Resistance of Device output

2.4 VOLTAGE SUPERVISOR SOT23 EVALUATION BOARD DESCRIPTION

The Voltage Supervisor SOT23 Evaluation Board PCB is designed to be flexible in the type of device evaluation that can be implemented.

The following sections describe each element of this evaluation board in further detail.

2.4.1 Power and Ground

The Voltage Supervisor SOT23 Evaluation Board can have connection posts installed for the power ( V_DD ) and ground ( V_SS ) planes. The layout allows either through-hole or surface-mount connectors.

For device evaluation, the use of an external variable power supply or waveform generator is required. The type of equipment used will determine the evaluation that may be performed.

2.4.2 Output (V OUT)

The Voltage Supervisor SOT23 Evaluation Board can have a connection post installed for the output ( V_OUT ) signal. The layout allows either a through-hole connector or a surface mount connector.

For device evaluation, the use of an oscilloscope or digital volt meter (DVM) is required. The type of equipment used will determine the evaluation that may be performed.

2.4.3 SOT-23-3 Footprints

There are four SOT-23-3 pinout options that the Voltage Supervisor SOT23 Evaluation Board PCB supports. Figure 2-3 shows these four pinouts. Some devices may use different nomenclature for the pin names, such as GND instead of V_SS , V_IN instead of V_DD and RESET (or RESET) or RST instead of V_OUT .

Other Microchip analog devices may be used with this PCB if the power and ground pins match one of these four options. Appendix C. "Microchip Analog SOT-23 Device Compatibility" discusses other Microchip analog devices that may be used with this PCB.

FIGURE 2-3: PINOUT OPTIONS
Option 1

Option 2 Option 3 Option 4

2.4.4 Passive Components (C1, C2, R1, R2 and R3)

The footprints for these components are present to allow maximum flexibility in the use of this PCB to evaluate a wide range of SOT-23-3 devices. The purpose of these components may vary depending on the device under evaluation and how it is to be used in the desired circuit. Please refer to the device data sheet for the components that should be used when using that device.

2.5 EVALUATING THE DEVICE

When evaluating a Voltage Supervisor or Voltage Detector device, a minimum set of test equipment should be available. Table 2-3 shows the recommended test equipment.

TABLE 2-3: TEST EQUIPMENT

Hardware Connect to: Comment
Variable Power Supply	V_DD, V_SS	This allows the voltage to the SOT23 Evaluation Board to be varied so the device output can be monitored.
Arbitrary Waveform Generator	V_DD, V_SS	This is like a variable power supply, but allows program- ability into the input signal that the device will be subjected to. This also allows a particular waveform to be repeated (such as a 60 Hz sine wave that varies from 1V to 5V)
Digital Multi-Meter (D.M.M.)	V_OUT	Used to indicate the output state (Low or High) of the Voltage Supervisor/Voltage Detector.
Oscilloscope V	OUT	Allows the device conditions and response to be better evaluated due to the ability to capture this information. This is useful for faster signals and cases where small spikes need to be detected.
Test Light (LED) V	OUT	Used to visually indicate the output state (low or high) of the Voltage Supervisor/Voltage Detector. Ensure that the current requirements of this light can be supplied by the device's output pin.

A typical system that would be used to evaluate the voltage supervisor or voltage detector device is shown in Figure 2-4. Figure 2-4 also shows an example input and output waveforms for a voltage supervisor or voltage detector device.

FIGURE 2-4: EVALUATION SYSTEM

graph LR
    A["Variable Power Supply or Arbitrary Waveform Generator"] --> B["Voltage Supervisor or Voltage Detector"]
    B --> C["C2"]
    C --> D["R3"]
    D --> E["Test Point"]
    E --> F["Oscilloscope"]
    G["Arbitrary Waveform Generator Output"] --> H["Device V_DD out of Valid Operating Range"]
    I["Test Point or VOUT"] --> J["Output voltage may be indeterminate"]

Voltage Supervisor SOT23 Evaluation Board User's Guide

NOTES:

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the schematics and layouts for the Voltage Supervisor SOT23 Evaluation Board. Diagrams included in this appendix:

• Board Schematic - Digital Circuitry
- Board - Top Layer

A.2 SCHEMATICS AND PCB LAYOUT

Figure A.3 shows the schematic of the Voltage Supervisor SOT23 Evaluation Board. Figure A.4 shows the layout for the top layer of the Voltage Supervisor SOT23 Evaluation Board. The layer order is shown in Figure A-1.

FIGURE A-1: LAYER ORDER

Top Layer (Power, Ground, and Signals) Bottom Layer (Blank)

A.3 BOARD SCHEMATIC 1

A B C D E F 1 2 3 4 VSS VDD +5V U1 Vdd C1 MCP112 U2 TCM809 U3 VDS VSS MCP1525 U4 VSS MCP100 +5V R1 TP4 R3 VOUT R2 C2 NOTE: Components C1, C2, R1, R2 and R3 are placed to support different devices and configurations. These components amy not be required for some configurations. A B C D E F Voltage Supervisor Eval Bd. Size C MicroCHIP 10.3-00030 Rev 1 C Erg. M. Palmer Drawn by: / Garissa File name: Voltage Sup., Del R1.SCHD Sheet - 1 of 1 Date: Tue Aug 27, 2004

A.4 BOARD LAYOUT - TOP LAYER WITH SILK SCREEN

102-00030 VOUT NETB0062 VSS C1 Opt 1 U1 Opt 2 U2 Opt 3 U3 Opt 4 R2 C2 Volt. Sup. SOT23 Eval Bd. R1 R3 VDD 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 VDD

NOTES:

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS

Qty	Reference Description	Option Manufacturer Part Number
1 PCB	103-00030 SOT2	3 Evaluation Board PCB Microchip	Technology Inc.	103-00030
0 U1,	U2, U3, U4 SOT-2	3-3 Device(Only one of U1 - U4 installed per board)	Microchip Technology Inc.	User-specified
0 C1	Power Supply Bypass CapacitorSurface-mount (805 package)(Optional - Application-dependent)		— User-specified
0 C2	Output Filer CapacitorSurface-mount (805 package)(Optional - Application-dependent)		— User-specified
0 R1	Output Pull-up resistorSurface-mount (805 package)(Optional - Application-dependent)		— User-specified
0 R2	Output Pull-down resistorSurface-mount (805 package)(Optional - Application-dependent)		— User-specified
0 R3	Output inline resistorSurface-mount (805 package)(Optional - Application-dependent)		— User-specified
0	V_DD, V_SS, V_OUT	V_DD, V_SS and V_OUT through-hole connector	Keystone Electronics®	5012
0	V_DD, V_SS, V_OUT	V_DD, V_SS and V_OUT surface-mount connector	Keystone Electronics	5016

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.

NOTES:

Appendix C. Microchip Analog SOT-23 Device Compatibility

C.1 INTRODUCTION

This appendix documents other Microchip analog devices that can be evaluated using this PCB. New devices may be introduced after the publication of this document that may be supported. Compare the pinout of the device to the PCB schematic/layout to determine compatibility of any SOT-23-3 (3-pin SOT-23) packaged device.

C.2 PCB COMPATIBILITY

There are four SOT-23-3 (3-pin SOT-23) pinouts that the Voltage Supervisor SOT23 Evaluation Board PCB supports. Figure C-1 shows these four pinouts. Other Microchip analog devices may be used with this PCB if the power and ground pins match one of these four options. Though these devices may use different nomenclature for the pin names, as long as the power and ground signals match one of the four options, this PCB should be able to be used to evaluate that device.

Table C-1 shows the Microchip analog device part number, the analog family the device belongs to, which footprint option to use and the recommended components to use for the circuit. Please refer to the device data sheet for complete information of the application circuit.

FIGURE C-1: SOT-23-3 PINOUT OPTIONS
Option 1

Option 2 Option 3 Option 4

TABLE C-1: MICROCHIP ANALOG DEVICES AND SOT23 EVAL BOARD CIRCUIT/FOOTPRINT OPTION SELECTION

Device Device Family	Supported on	Comment/Recommended Component Values:
MCP1700 LDO Option 2 C1 = 1 μF	Ceramic	C2 = 1 μF Ceramic
MCP1701 LDO Option 2 C1 = 1 μF	Tantalum	C2 = 1 μF Tantalum
MCP1525 Voltage Reference Option 3 C1 = 0.1 μF		C2 = 1 μF to 10 μF
MCP1541 Voltage Reference Option 3 C1 = 0.1 μF		C2 = 1 μF to 10 μF
TC59 LDO Option 4 C1 = 1 μF Tantalum		C2 = 1 μF Tantalum

C.3 IDEAS ON EVALUATING AN LDO

One of the characteristics that a designer may wish to evaluate on a LDO is how the LDO responds to transient loads. Figure C-2 shows a system block diagram for evaluating a LDO and a typical waveform response (at test point) for the function generator signal. The output of the function generator connects to a BJT transistor to simulate the fast switching loads of the circuit.

The value of C2, R3 and C_L will depend on the LDO used and the load of the circuit. Look at both the worst-case amplitude load requirements for a loaded and unloaded system. As the output response of the LDOs become faster, the selection of a smaller (cheaper) output load capacitor ( C_L ) becomes possible (for the same system performance).

FIGURE C-2: LDO EVALUATION SYSTEM

graph LR
    A["Power Supply"] --> B["LDO"]
    B --> C["C2"]
    C --> D["R3"]
    D --> E["From Function Generator"]
    F["Test Point"] --> G["Output Waveform"]
    H["Function Generator"] --> I["Output Waveform"]
    J["Test Point"] --> K["Output Waveform"]

NOTES:

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