Datasheet > ST1S32

ST1S32

更新时间： 2024-11-24 01:15:39

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描述
4 A DC step-down switching regulator

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ST1S32 数据手册

ST1S32

4 A DC step-down switching regulator

Datasheet — production data

Features

■ 4 A DC output current

■ 2.8 V to 5.5 V input voltage

■ Output voltage adjustable from 0.8 V

■ 1.5 MHz switching frequency

■ Internal soft-start and enable

VFDFPN 8 4x4x1.0

■ Integrated 60 mΩand 45 mΩPower MOSFETs

■ All ceramic capacitor

Description

■ Power Good (POR)

The ST1S32 is an internally compensated 1.5

MHz fixed-frequency PWM synchronous step-

down regulator. The ST1S32 operates from 2.8 V

to 5.5 V input, while it regulates an output voltage

as low as 0.8 V and up to V_IN.

■ Cycle-by-cycle current limiting

■ Current foldback short-circuit protection

■ VFDFPN 8 4x4x1.0 package

Applications

The ST1S32 integrates a 60 mΩ high-side switch

and a 45 mΩ synchronous rectifier, allowing very

high efficiency with very low output voltages.

■ µP/ASIC/DSP/FPGA core and I/O supplies

■ Point of Load for: STB, TV, DVD

The peak current mode control with internal

compensation delivers a very compact solution

with a minimum component count.

■ Optical storage, hard disk drives, printers,

audio/graphic cards

The ST1S32 is available in 4 mm x 4 mm, 8-lead

VFDFPN package.

Figure 1.

Application circuit

VIN

VOUT

VINSW

VINA

Cin_a

ST1S32

VFB

Cout

Cin_sw

GND

AM12608V1

May 2012

Doc ID 023246 Rev 1

1/29

This is information on a product in full production.

www.st.com

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