November 2016

DocID030001 Rev 1

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STEVAL-ISA198V1

2 A step down DC - DC switching regulator (VIN = 4.5 V to 60 V)

based on the L7987L

Data brief

Features



4.5 V to 60 V input voltage



Step-down (buck) conversion





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

Description

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.

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.