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L7987L-Based, 2A Step-Down DC-DC Switching Regulator (VIN = 4.5V to 60V)

STEVAL-ISA198V1

Overview

The STEVAL-ISA198V1 product evaluation board is a step-down switching power supply based on the L7987L regulator in an HTSSOP16 package. The output voltage can be set starting from 0.8 V. Low drop-out operation, due to the advanced integrated switch management, can be achieved.

The L7987L is a 61 V, 2 A step-down asynchronous switching regulator with embedded power MOSFET capable of delivering up to 2 A of current, depending on the application conditions.
The embedded switch-over feature on the V_BIAS pin and the light load management (pulse skipping) help maximize power conversion efficiency across the entire load range.
The soft-start, current limit threshold and switching frequency are adjustable for application optimization.
The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1.5 MHz; two L7987L regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current.

Main features

4.5 V to 60 V input voltage
Step-down (buck) conversion
5 V output voltage (V_IN > 6 V)
Up to 2 A DC output current
500 kHz switching frequency
5 ms programmed soft-start
Compliant with ceramic output capacitors
180° out of phase synchronization available
Auto recovery overcurrent and thermal protection
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:2025-05-12 14:08:27

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