Datasheet > ST1S31

ST1S31

更新时间： 2024-09-29 14:58:23

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
36页	1534K
描述
3 A DC步降开关稳压器

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ST1S31 数据手册

ST1S31

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, DVDs

 Optical storage, hard disk drive, printers,

audio/graphic cards

VFDFPN 3 x 3 - 8L

SO8

Description

The ST1S31 device is an internally compensated

1.5 MHz fixed-frequency PWM synchronous step-

down regulator. The ST1S31 operates from 2.8 V

to 5.5 V input, while it regulates an output voltage

Features

 3 A DC output current

 2.8 V to 5.5 V input voltage

as low as 0.8 V and up to V .

 Output voltage adjustable from 0.8 V

 1.5 MHz switching frequency

 Internal soft-start and enable

 Integrated 60 m and 45 m power MOSFETs

 All ceramic capacitor

The ST1S31 integrates a 60 m high-side switch

and a 45 m synchronous rectifier allowing very

high efficiency with very low output voltages.

The peak current mode control with internal

compensation delivers a very compact solution

with a minimum component count.

 Power Good (POR)

The ST1S31 device is available in 3 mm x 3 mm,

8 lead VFDFPN and SO8 packages.

 Cycle-by-cycle current limiting

 Current foldback short-circuit protection

 VFDFPN 3 x 3 - 8L, SO8 packages

Figure 1. Application circuit

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August 2018

DocID022998 Rev 5

1/36

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...36

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