Datasheet > ST1S50

ST1S50

更新时间： 2024-11-27 14:57:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		转换器
页数	文件大小	规格书
29页	701K
描述
轻载高效4A单片式同步降压转换器

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中文翻译

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数据手册

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ST1S50 数据手册

ST1S50

4 A monolithic synchronous step-down switching converter with

high efficiency at light load

Datasheet - production data

Applications

 Point of load for: STB, TVs, gateway

 Solid state disk drive, Blu-ray, DVD

VFDFPN10



P/ASIC/DSP/FPGA core and I/O supplies

Features

Description

 4 A output current

The ST1S50 device is a 500 kHz fixed frequency

PWM synchronous step-down regulator. The

ST1S50 operates from 4.0 V to 18 V input, while it

regulates an output voltage as low as 0.8 V and

 4.0 V to 18 V input voltage

 Output voltage adjustable from 0.8 V to 0.88 x

up to 0.88 x V .

 500 kHz switching frequency

 High efficiency at light load

 Programmable soft-start and enable

 Integrated 95 m and 69 m power MOSFETs

 All ceramic capacitor

The ST1S50 device integrates a 95 m high-side

switch and a 69 m synchronous rectifier

allowing very high efficiency with very low output

voltages.

The peak current mode control with a special

PFM mode enables high efficiency at a light load.

 Power Good

The ST1S50 device is available in a VFDFPN10

3 x 3 x 1 mm - 10 leads package.

 Cycle-by-cycle current limiting

 Short-circuit protection

 VFDFPN10 3 x 3 x 1 mm - 10 L

Figure 1. Application circuit

Cbst

VOUT

VIN

BST

VINSW

VINA

Cina

Css

Cinsw

EN_SS

COMP

ST1S50

Cout

GNDA

GNDP

March 2015

DocID025723 Rev 4

1/29

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...29

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