STEVAL-ISA052V1 datasheet(1/4 Pages) STMICROELECTRONICS

部品番号	STEVAL-ISA052V1

部品情報	Negative current limit

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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Data brief

For further information contact your local STMicroelectronics sales office.

November 2010

Doc ID 18215 Rev 1

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4

STEVAL-ISA052V1

High efficiency step-down controller with embedded 2 A LDO

regulator demonstration board based on the PM6675S

Features

■ 4.5 V to 28 V input voltage range

■ 0.6 V, ±1 % voltage reference

■ 1.5 V fixed output voltage

■ 0.6 V to 3.3 V adjustable output voltage

■ 1.237 V ±1 % reference voltage available

■ Very fast load transient response constant on-

time loop control

■ No-RSENSE current sensing using low-side

MOSFETs’ RDS(on)

■ Negative current limit

■ Latched OVP, UVP and thermal shutdown

■ Fixed 3 ms soft-start

■ Selectable pulse-skipping at light load

■ Selectable no-audible (33 kHz) pulse-skip

mode

■ All ceramic output capacitors application

supported

■ Output voltage ripple compensation

■ Output soft-end

■ RoHS compliant

Description

The STEVAL-ISA052V1 demonstration board is

based on the PM6675S device which consists of

a single high efficiency step-down controller and

an independent low drop-out (LDO) linear

regulator.

The constant on-time (COT) architecture assures

fast transient response supporting both

electrolytic and ceramic output capacitors. An

embedded integrator control loop compensates

the DC voltage error due to the output ripple.

Selectable low-consumption mode allows the

highest efficiency over a wide range of load

conditions. The low-noise mode sets the minimum

switching frequency to 33 kHz for audio-sensitive

applications. The LDO linear regulator can sink

and source up to 2 Apk. Two fixed current limits

(±1 A and ±2 A) can be chosen.

An active soft-end is independently performed on

both the switching and the linear regulator outputs

when disabled.

STEVAL-ISA052V1

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同様の部品番号 - STEVAL-ISA052V1

メーカー	部品番号	データシート	部品情報
STMicroelectronics	STEVAL-ISA052V2	137Kb / 4P	Negative current limit 05-May-2008

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