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ST1S50-based, 4A step-down switch evaluation board

STEVAL-ISA146V1

Overview

The STEVAL-ISA146V1 is a product evaluation board used to evaluate the ST1S50, a 500 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S50 operates from a 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to 0.88 x V_IN.

Main features

4 A output current
4.0 V to 18 V input voltage
Output voltage adjustable from 0.8 V to 0.88 x V_IN
500 kHz switching frequency
High efficiency at light load
Programmable soft-start and enable
Integrated 95 mW and 69 mW power MOSFETs

All ceramic capacitor
Power Good
Cycle-by-cycle current limiting
Short-circuit protection
Hysteretical thermal shutdown
RoHS compliant

Design Files

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Update:2025-07-03 12:37:09

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