ST1S09PU datasheet(1/18 Pages) STMICROELECTRONICS

部品番号	ST1S09PU

部品情報	2A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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1 / 18 page

July 2007

Rev. 2

1/18

18

ST1S09

2A, 1.5 MHz PWM step-down switching regulator

with synchronous rectification

Features

■ 1.5MHz fixed frequency PWM with current

control mode

■ 2A output current capability

■ Typical efficiency: > 90%

■ 2% DC output voltage tolerance

■ Two versions available: Power Good or Inhibit

■ Integrated output over-voltage protection

■ Non switching quiescent current: (typ) 1.5mA

over temperature range

■ RDSON (typ) 100mΩ

■ Utilizes tiny capacitors and inductors

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

■ Available in DFN6 3x3mm 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 2A

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

A high PWM switching frequency (1.5MHz) allows

the use of tiny surface-mount components.

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 3x3mm package.

DFN6 (3x3mm)

www.st.com

Table 1.

Devices summary

Order codes

Packaging

Package

ST1S09PU

ST1S09PUR

DFN6D (3x3 mm)

ST1S09APU (1)

1.

Available on request.

ST1S09APUR

DFN6D (3x3 mm)

ST1S09IPU

ST1S09IPUR

DFN6D (3x3 mm)

同様の部品番号 - ST1S09PU

メーカー	部品番号	データシート	部品情報
STMicroelectronics	ST1S09PU	417Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm
STMicroelectronics	ST1S09PUR	387Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

More results

同様の説明 - ST1S09PU

メーカー	部品番号	データシート	部品情報
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