aerobotics

L5987-based, 3A step-down switching regulator evaluation board

STEVAL-ISA201V1

Overview

The STEVAL-ISA201V1 product evaluation board provides design engineers with a fully functional step-down switching regulator with an output current of up to 3 A. The STEVAL-ISA201V1 integrates the STMicroelectronics L5987 step-down switching regulator together with all the external components required for a typical application. The rated voltage of the input capacitor and the Schottky diode rectifier repetitive peak reverse voltage are both 25 V, rendering the board capable of covering the entire 2.9 V - 18 V input voltage range of the L5987 device.

The board features an external resistor divider (R1 and R2) designed for an output voltage of 1.8 V. The output voltage can be set to a level from 0.6 V up to V_IN. The compensation network on the evaluation board allows the use of an MLCC as output filter to keep the loop stable. The switching frequency on the board is set to 430 kHz by means of the R5 resistor connected to pin F_SW.

Main features

1.8 V, up to 3 A DC output current
2.9 V to 18 V input voltage
Output voltage adjustable from 0.6 V to V_IN
430 kHz switching frequency, programmable in the range 250 kHz – 1 MHz
Internal soft-start and inhibit
Low dropout operation: 100% duty cycle
Zero-load current operation
Overcurrent and thermal protection
VFQFPN8 (3 x 3 mm) package
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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Update:2025-05-10 10:18:56

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