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L4971-Based 1.5A Step-Down Switching Regulator (VIN = 8 to 55V)

STEVAL-ISA202V1

Overview

The STEVAL-ISA202V1 product evaluation board provides a platform for evaluation of the L4971, a 1.5 A asynchronous step-down power switching regulator with zero load current operation capability.

Based on the selection of the external components, the device can operate in the entire input voltage range of 8 V < V_IN < 55 V. The output voltage is limited by the voltage rating of the output capacitor, so it can be adjusted within the 3.3 V < V_OUT < 30 V range through voltage divider R2, R3.
The input and output capacitors are capable of sustaining the RMS current within the operating range.

Main features

Input voltage range: 8 V to 55 V
Output voltage: 5.1 V ± 3% (line, load and thermal)
Output ripple: less than 51 mV
Output current range: up to 1.5 A
Max output ripple current: 30%
Current limit: 2.5 A typ.
Switching frequency: 200 kHz
RoHS compliant

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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