Datasheet > ST1S09_08

ST1S09_08

更新时间： 2024-11-26 04:02:31

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器开关
页数	文件大小	规格书
18页	418K
描述
2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm

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ST1S09_08 数据手册

ST1S09

2 A, 1.5 MHz PWM step-down switching regulator

with synchronous rectification

Features

■ 1.5 MHz fixed frequency PWM with current

control mode

■ 2 A output current capability

■ Typical efficiency: > 90%

■ 2 % DC output voltage tolerance

■ Two versions available: power good or inhibit

■ Integrated output over-voltage protection

DFN6 (3x3mm)

■ Non switching quiescent current: (typ) 1.5 mA

over temperature range

■ R

(typ) 100 mΩ

DSON

Moreover, since the required synchronous

rectifier is integrated, the number of the external

components is reduced to minimum: a resistor

divider, an inductor and two capacitors. The

power good function continuously monitors the

output voltage. An open drain power good flag is

released when the output voltage is within

regulation. In addition, a low output ripple is

guaranteed by the current mode PWM topology

and by the use of low E.S.R. SMD ceramic

capacitors. The device is thermally protected and

the output current limited to prevent damages due

to accidental short circuit. The ST1S09 is

available in the DFN6 3x3 mm package.

■ Utilizes tiny capacitors and inductors

■ Operating junction temp. -30 °C to 125 °C

■ Available in DFN6 (3x3 mm) exposed pad

Description

The ST1S09 is a step-down DC-DC converter

optimized for powering low output voltage

applications. It supplies a current in excess of 2 A

over an input voltage range from 2.7 V to 6 V.

A high PWM switching frequency (1.5 MHz)

allows the use of tiny surface-mount components.

Table 1.

Device summary

Order codes

Packaging

Package

ST1S09PU

ST1S09APU ⁽¹⁾

ST1S09IPU

ST1S09PUR

ST1S09APUR

ST1S09IPUR

DFN6D (3x3 mm)

1. Available on request.

January 2008

Rev 3

1/18

www.st.com

12 3 4 5 6 7...18

中文翻译

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ST1S09APUR	STMICROELECTRONICS	获取价格	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
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ST1S09IPUR	STMICROELECTRONICS	获取价格	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification
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