MIC22705YML - Carte d'évaluation Microchip - Free user manual and instructions
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USER MANUAL MIC22705YML Microchip
The Micrel MIC22705 is a high-efficiency, 7A, integrated switch, synchronous buck (step-down) regulator. The MIC22705 achieves more than 95% efficiency and switches at 1MHz. The ultra-high speed control loop keeps the output voltage within regulation even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and is adjustable down to 0.7V.
The MIC22705 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) and Power Good (PG) inputs allow versatile turn-on and turn-off sequencing across multiple devices. The Ramp Control™ (RC) input allows start-up voltage tracking, either directly or ratio-metrically.
The MIC22705 is available in a 24-pin 4mm x 4mm MLF ^® with a junction operating range from -40^ to +125^ .
Data sheets and support documentation are found on the Micrel web site: www.micrel.com.
Requirements
The MIC22705YML EV requires a power supply of 2.9V to 5.5V, and a test load. Ensure that the power supply can provide the wattage required for the chosen test load. The load can be active (electronic load) or passive (resistor). Additionally, monitor the Power Good output (PG) with a multimeter or an oscilloscope if desired.
Precautions
There is no reverse input protection on this board. When connecting supplies and signals ensure that correct polarities are observed.
Getting Started
Connect the V_IN supply (2.9V to 5.5V) across the PVIN and PGND terminals. Monitor V_IN at the PVIN and PGND terminals with a voltmeter.
2. Enable/SHDN Inputs
The enable input EN is internally pulled up with a 1 A current source. When external on/off control is desired, install Q1 and R5, and connect a logic level control signal to the SHDN input. When SHDN is high, the output is off, and when SHDN is low, the output is on.
3. Monitor Outputs
Monitor the output V_OUT with a scope or DVM connected across the VOUT and PGND terminals.
4. Output Load
Connect a load across the VOUT and PGND terminals. Use an active or passive load.
5. Turn On the Power
Turn on the power supply and verify that V_OUT = 1.8V .
Ordering Information
| Part Number Description |
| MIC22705YML EV Evaluation Board for the MIC22705YML |
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax +1 (408) 474-1000 • http://www.micrel.com
EV Board Features
See the MIC22705YML datasheet for detailed explanations of these functions.
Enable/Delay (EN/DLY)
Enable/Delay allows delayed turn on of the MIC22705. Install a capacitor in location C6 to increase the start-up delay of the MIC22705.
Shutdown Input (SHDN)
SHDN allows enable/disable of the MIC22705 with an external logic signal. To activate the shutdown feature, install components into the locations labeled Q1 and R5 (component recommendations are listed in the Bill of Materials later in this document). With the components installed, force SHDN high to disable the MIC22705, and low to allow the MIC22705 to operate normally.
Delay (DELAY)
DELAY allows a delayed Power Good output (PG) indication. Install a capacitor in location C8 to increase the Power Good delay timing of the MIC22705.
Ramp Control (RC)
Ramp control allows slowing the slew rate of the MIC22705 output. Increase the value of capacitor C7 to reduce the slew rate.
Power Good Output (PG)
Open drain output PG pulls low when the output voltage of the MIC22705 is out of specification. PG is pulled up to V_IN by a 47.5kΩ resistor.
Switch Voltage ( V_sw )
Test point V_SW is provided to monitor the internal switching node. V_SW is isolated from the switch node by 49.9Ω resistor R6.
Typical Characteristics
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| Time (2ms/div) | VIN (V) | VEN/DLY (V) | VOUT (V) | VPG (V) | | -------------- | ------- | ----------- | -------- | ------- | | 0 | 5.5 | 1.8 | 7 | 1000 | | 2 | 5.5 | 1.8 | 7 | 1000 | | 4 | 5.5 | 1.8 | 7 | 1000 |
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| Signal | Value | |------------|-------------| | VIN | 5.5V | | VOUT | 1.8V | | IOUT | 7A | | CRC | 1000pF | | CDELAY | OPEN | | VEN/DLY | - | | VOUT | - | | VPG | - |
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| Time (1ms/div) | V_IN (1V/div) | V_OUT (200mV/div) | | -------------- | ------------- | ----------------- | | 0 | 3.0 | 3.0 | | 1.8 | 1.8 | 1.8 | | 5.0 | 5.0 | 5.0 |
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| Time (40μs/div) | V_IN (V) | V_OUT (V) | I_OUT (A) | | --------------- | -------- | --------- | --------- | | 0 | 5.5 | 1.8 | 1A | | 2 | 5.5 | 1.8 | 1A | | 4 | 5.5 | 1.8 | 1A | | 6 | 5.5 | 1.8 | 1A | | 8 | 5.5 | 1.8 | 1A | | 10 | 5.5 | 1.8 | 1A | | 12 | 5.5 | 1.8 | 1A | | 14 | 5.5 | 1.8 | 1A | | 16 | 5.5 | 1.8 | 1A | | 18 | 5.5 | 1.8 | 1A | | 20 | 5.5 | 1.8 | 1A | | 22 | 5.5 | 1.8 | 1A | | 24 | 5.5 | 1.8 | 1A | | 26 | 5.5 | 1.8 | 1A | | 28 | 5.5 | 1.8 | 1A | | 30 | 5.5 | 1.8 | 1A | | 32 | 5.5 | 1.8 | 1A | | 34 | 5.5 | 1.8 | 1A | | 36 | 5.5 | 1.8 | 1A | | 38 | 5.5 | 1.8 | 1A | | 40 | 5.5 | 1.8 | 1A | | 42 | 5.5 | 1.8 | 1A | | 44 | 5.5 | 1.8 | 1A | | 46 | 5.5 | 1.8 | 1A | | 48 | 5.5 | 1.8 | 1A | | 50 | 5.5 | 1.8 | 1A | | 52 | 5.5 | 1.8 | 1A | | 54 | 5.5 | 1.8 | 1A | | 56 | 5.5 | 1.8 | 1A | | 58 | 5.5 | 1.8 | 1A | | 60 | 5.5 | 1.8 | 1A | | 62 | 5.5 | 1.8 | 1A | | 64 | 5.5 | 1.8 | 1A | | 66 | 5.5 | 1.8 | 1A | | 68 | 5.5 | 1.8 | 1A | | 70 | 5.5 | 1.8 | 1A | | 72 | 5.5 | 1.8 | 1A | | 74 | 5.5 | 1.8 | 1A | | 76 | 5.5 | 1.8 | 1A | | 78 | 5.5 | 1.8 | 1A | | 80 | 5.5 | 1.8 | 1A | | 82 | 5.5 | 1.8 | 1A | | 84 | 5.5 | 1.8 | 1A | | 86 | 5.5 | 1.8 | 1A | | 88 | 5.5 | 1.8 | 1A | | 90 | 5.5 | 1.8 | 1A | | 92 | 5.5 | 1.8 | 1A | | 94 | 5.5 | 1.8 | 1A | | 96 | 5.5 | 1.8 | 1A | | 98 | 5.5 | 1.8 | 1A | | Note: The values for V_IN and I_OUT are not provided in the code snippet, so they are not explicitly provided in the image.
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| OUTPUT CURRENT (A) | 2.5V | 1.8V | 1.5V | 1.2V | 1.0V | 0.9V | 0.8V | | ------------------ | ----- | ----- | ----- | ----- | ----- | ----- | ----- | | 0 | 97.0 | 96.5 | 96.0 | 95.5 | 95.0 | 94.5 | 94.0 | | 1 | 96.5 | 96.0 | 95.5 | 95.0 | 94.5 | 94.0 | 93.5 | | 2 | 96.0 | 95.5 | 95.0 | 94.5 | 94.0 | 93.5 | 93.0 | | 3 | 95.5 | 95.0 | 94.5 | 94.0 | 93.5 | 93.0 | 92.5 | | 4 | 95.0 | 94.5 | 94.0 | 93.5 | 93.0 | 92.5 | 92.0 | | 5 | 94.5 | 94.0 | 93.5 | 93.0 | 92.5 | 92.0 | 91.5 | | 6 | 94.0 | 93.5 | 93.0 | 92.5 | 92.0 | 91.5 | 91.0 | | 7 | 93.5 | 93.0 | 92.5 | 92.0 | 91.5 | 91.0 | 90.5 | | 8 | 93.0 | 92.5 | 92.0 | 91.5 | 91.0 | 90.5 | 90.0 | | 9 | 92.5 | 92.0 | 91.5 | 91.0 | 90.5 | 90.0 | 89.5 | | V_IN = 3.3V | | | | | | | | | Efficiency | | | | | | | | | Efficiency (%) | | | | | | | | | Output Current (A) | | | | | | | | | Efficiency (%) | | | | | | | | | Output Current (A) | | | | | | | | | Efficiency (%) | | | | | | | | | Output Current (A) | | | | | | | | | Efficiency (A) | | | | | | | | | Output Current (A) | | | | | | | | | Efficiency (%) | | | | | | | | | Output Current (A) | | | | | | | | | Efficiency (%) | | | | | | | | | Input Voltage (V_IN)| | Output Current (A) | | | | | | | | | Efficiency (%) | | Output Current (A) | | | | | | | | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Input Voltage (V_IN)| | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (A) | | Output Current (A) | | Efficiency (%) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Current (B) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Time (min) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Output Speed (m/s) | | Input Voltage (V_IN, min)| | ------------------------ | | | | | | ↑ ↓ ↑ ↓ ↑ ↓ ↓ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↑,↓ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑, ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑, ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑, ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑, ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↓
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| OUTPUT CURRENT (A) | POWER DISSIPATION (W) | | ------------------ | ---------------------- | | 0 | 0 | | 2 | ~0.2 | | 4 | ~0.6 | | 6 | ~1.4 | | 7 | ~1.8 |Evaluation Board Schematic
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PVIN 2.9V to 5.5V + C12 470μF C1 22μF 1 C2 22μF 6 C3 22μF 13 C4 22μF 18 R7 2.2 17 SVIN MIC22705 PVIN SW SW SW SW U1 23 22 21 20 R6 49.9 VSW L1 1.0μH 11 10 9 8 EP FB 14 3 DELAY COMP EP FB DELAY C10 47μF C11 47μF R1 1.10k VOUT 1.8V/7A C13 10nF R2 698 C12 100pF C9 39pF R4 20k PGND EN/DLY RC PGND PGND PGND Q1 Open 2 C6 Open 1nF SHDN R5 Open 1 12 19 24 7Bill of Materials
| Item | Part Number | Manufacturer | Description Qty. | |
| C1, C2, C3, C4 | C2012X5R0J226M | TDK^(1) | 22μF/6.3V, 0805, Ceramic Capacitor 5 | |
| 08056D226MAT | AVX^(2) | |||
| GRM21BR60J226ME39L | Murata^(3) | |||
| C5 | 06036D225TAAT2A | AVX^(2) 2.2μF/6.3V , Ceramic Capacitor, X5R, Size 0805 | 1 | |
| GRM188R7160J225M | Murata^(3) 2.2μF/6.3V , Ceramic Capacitor, X7R, Size 0805 | |||
| C1608X5R0J225M | TDK^(1) | |||
| C13 | GRM188R71H103KA01D | Murata^(3) 10nF , 0603, Ceramic Capacitor 1 | ||
| C7 | Open(VJ0603Y102KXQCW1BC) | Vishay^(4) 1nF , 0603, Ceramic Capacitor | 1 | |
| Open(GRM188R71H102KA01D) | Murata^(3) 1nF/50V , X7R, 0603, Ceramic Capacitor | |||
| Open(C1608C0G1H102J) | TDK^(1) 1nF/50V , COG, 0603, Ceramic Capacitor | |||
| C6, C8 Open | ||||
| C9 | GRM1555C1H390JZ01D | Murata^(3) 39pF/50V , COG, 0402, Ceramic Capacitor | 1 | |
| VJ0402A390KXQCW1BC | BC Components^(5) | 39pF /10V, 0402, Ceramic Capacitor | ||
| C10, C11 | C3216X5R0J476M | TDK^(1) 47μF/6.3V , X5R, 1206, Ceramic Capacitor | 2 | |
| GRM31CR60J476ME19 | Murata^(3) 47μF/6.3V , X5R, 1206, Ceramic Capacitor | |||
| GRM31CC80G476ME19L | Murata^(3) 47μF/4V , X6S, 1206, Ceramic Capacitor | |||
| C12 | VJ0402A101KXQCW1BC | Vishay^(4) 100pF , 0603, Ceramic Capacitor | 1 | |
| GRM1555C1H101JZ01D | Murata^(3) 100pF/50V , COG, 0402, Ceramic Capacitor | |||
| L1 | SPM6530T-1R0M120 | TDK^(1) 1μH , 12A, size 7x6.5x3mm | 1 | |
| HCP0704-1R0-R | Coiltronics^(6) | 1μH, 12A, size 6.8x6.8x4.2mm | ||
| C_IN | BA1851A3477M | Epcos^(7) | 470μF/10V, Elect., 8×11.5 | 1 |
| R1 | CRCW06031101FKEYE3 | Vishay^(4) Resistor , 1.10k, 0603, 1% | 1 | |
| R2 | CRCW04026980FKEYE3 | Vishay^(4) | Resistor, 698Ω, 0603, 1% | 1 |
| R3 | CRCW06034752FKEYE3 | Vishay^(4) Resistor , 47.5k, 0603, 1% | 1 | |
| R4 | CRCW04022002FKEYE3 | Vishay^(4) Resistor , 20k, 0402, 1% | 1 | |
| R5 | Open(CRCW06031003FRT1) | Vishay^(4) Resistor , 100k, 0603, 1% | 1 | |
| R6 | CRCW060349R9FKEA | Vishay^(4) | 49.9Ω Resistor, 1%, Size 0603 | 1 |
| R7 | CRCW06032R20FKEA | Vishay^(4) | 2.2Ω Resistor, 1%, Size 0603 | 1 |
| Q1 | Open(2N7002E) | Signal MOSFET - SOT23-6 | 1 | |
| Open(CMDPM7002A) | Central Semiconductor^(8) | |||
| U1 | MIC22705YML | Micrel, Inc. ^(6) | 1MHz, 7A Integrated Switch High-Efficiency Synchronous Buck Regulator | 1 |
Notes:
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TDK: www.tdk.com.
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AVX.: www.avx.com.
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Murata: www.murata.com.
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Vishay Tel: www.vishay.com.
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BC Components: www.bccomponents.com.
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Coiltronics: www.coiltronics.com.
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Epcos: www.epcos.com.
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Central Semiconductor: www.centralsemi.com.
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Micrel, Inc.: www.micrel.com.
Evaluation Board PCB Layout
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ICREL,INC 408-944-0800 PGND J2 TP3 EN/DLY J3 SHDN J4 DELAY J5 RC POR/PG SW Cin + TP2 C1 C2 U1 U2 U3 R1 R2 R3 R4 R5 C3 C4 C5 C6 C7 C8 C9 C10 L1 VOUT J7 2225.151 (mil) 2036.97 (mil) MIC22705YMLMIC22705 Evaluation Board Top Layer
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2225.151 (mil) ICREL,INC 408-944-0800 PGND J2 Cin + PVIN J1 TP3 TP2 EN/DLY Q1 C6 SHDN J3 J4 DELAY J5 RC POR/PG SW MIC22705YML C1 U1 6L R3 R6 C3 C2 TP1 VOUT J7 L1MIC22705 Evaluation Board Top Silk
Evaluation Board PCB Layout (Continued)
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| X (mil) | Y (mil) | | ------- | ------- | | 2225.151 | 2036.97 |MIC22705 Evaluation Board Mid-Layer 1 (Ground Plane)
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| Dimension (mil) | |---| | 2225.151 | | 2036.97 |MIC22705 Evaluation Board Mid-Layer 2
Evaluation Board PCB Layout (Continued)
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ICREL,INC 408-944-0800 U1 Pb Others Pb-Free RoHS BD#1103-2010-DT MIC22705YML (1lm) 121.2SSS 503E+26 (Lim)MIC22705 Evaluation Board Bottom Layer
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ICREL,INC 408-944-0800 *U1 Pb Others Pb-Free RoHS BD#1103-2010-DT MIC22705YML (Im) 121.2SSS (Im) 503.265MIC22705 Evaluation Board Bottom Silk
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