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May 2012

Doc ID 023235 Rev 1

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STEVAL-ISA101V1

2 A DC step-down switching regulator with 4 V/36 V input voltage

range based on the L5973D

Data brief

Features

Description

The STEVAL-ISA101V1 demonstration board is

based on the L5973D, a step-down monolithic

switching regulator with 2 A DC (2.5 A switch

peak current) current capability over the output

voltage range (1.235 V to 36 V).

The operating input voltage ranges from 4 V to

36 V. The device is based on BCD5 technology.

The embedded power element is a P-channel

D-MOS transistor so the driving stage does not

require any bootstrap capacitor and the duty cycle

can range up to 100%.

An internal oscillator fixes the switching frequency

at 250 kHz. A synchronization pin is available

when a higher switching frequency (up to 700

kHz) is required.

Pulse-by-pulse current protection and a frequency

foldback feature always guarantee an effective

short-circuit protection. Other features include

voltage feed-forward, protection against feedback

disconnection, inhibit and thermal shutdown.

Previous sales code: EVAL5973D.

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