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2 LMR38025-Q1 Evaluation Module
The LMR38025QEVM is configured to deliver 5 V and 2.5 A at a switching frequency of 400 kHz.
•
Tightly regulated output voltage of 5 V with 1.5% setpoint accuracy
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Wide input voltage operating range of 4.2 V to 80 V
•
98% maximum duty cycle
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PFM operation to improve efficiency at light load
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Spread spectrum for reduced EMI
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Frequency synchronization to external clock
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PWRGD signal indicates output regulation
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Supports start-up with pre-biased output
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Programmable system UVLO through precision enable
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Fully assembled, tested, and proven PCB layout
2.1 Quick Start Procedure
1. Connect the power supply between VIN and GND connectors using short wires.
2. Connect the load of converter between VOUT and GND connectors using short wires.
3. Connect the voltmeter 1 between VIN_S(TP1) and GND(TP2) to measure supply voltage (V
4. Connect the voltmeter 2 between VO_S(J6) and GND(TP3) to measure output voltage (V
5. Set the supply voltage (V
an appropriate level as well.
6. Turn on the power supply. The EVM powers up and provides V
7. Monitor the output voltage while increasing the load current to 2.5-A maximum.
See
Figure 2-1
for the location of the connectors and test points.
SNVU848 – NOVEMBER 2023
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) at an appropriate level between 6 V to 80 V. Set the current limit of the supply to
IN
Figure 2-1. LMR38025Q EVM Setup
Copyright © 2023 Texas Instruments Incorporated
LMR38025-Q1 Evaluation Module
= 5 V.
OUT
LMR38025QEVM User's Guide
)
IN
)
OUT
5
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