Datasheet > ST1S40

ST1S40

更新时间： 2024-11-24 14:57:47

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		开关稳压器
页数	文件大小	规格书
31页	1177K
描述
3A DC步降开关稳压器

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中文翻译

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ST1S40 数据手册

ST1S40

3 A DC step-down switching regulator

Datasheet

- production data

Applications

•

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

Point of load for: STB, TVs, DVD

HSOP-8

SO8

Optical storage, hard disk drive, printers,

audio/graphic cards

VFQFPN 4 x 4

Description

Features

The ST1S40 device is an internally compensated

850 kHz fixed-frequency PWM synchronous step-

down regulator. The ST1S40 operates from 4.0 V

to 18 V input, while it regulates an output voltage

as low as 0.8 V and up to V_IN.

•

3 A DC output current

4.0 V to 18 V input voltage

Output voltage adjustable from 0.8 V

850 kHz switching frequency

Internal soft-start

The ST1S40 integrates a 95 mΩ high side switch

and 69 mΩ synchronous rectifier allowing very

high efficiency with very low output voltages.

Integrated 95 mΩ and 69 mΩ Power MOSFETs

All ceramic capacitor

The peak current mode control with internal

compensation delivers a very compact solution

with a minimum component count.

Enable

Cycle-by-cycle current limiting

Current fold back short-circuit protection

The ST1S40 is available in HSOP-8, VFQFPN 4

mm x 4 mm - 8 lead, and standard SO8 package.

Available in HSOP-8, VFQFPN4x4-8L, and

SO8 packages

Figure 1. Application circuit

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September 2023

DocID17928 Rev 7

1/31

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...31

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