ST1S09 datasheet(1/18 Pages) STMICROELECTRONICS

Numer części	ST1S09

Szczegółowy opis	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification

PDF	18 Pages

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Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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1 / 18 page

April 2010

Doc ID 13632 Rev 4

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18

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

■ Non switching quiescent current: (typ) 1.5 mA

over temperature range

■ RDSON (typ) 100 mΩ

■ Utilizes tiny capacitors and inductors

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

■ Available in DFN6 (3 x 3 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.

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 ESR 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 (3 x 3 mm) package.

DFN6 (3 x 3 mm)

Table 1.

Device summary

Order codes

Package

ST1S09PUR

DFN6D (3 x 3 mm)

ST1S09APUR (1)

DFN6D (3 x 3 mm)

ST1S09IPUR

DFN6D (3 x 3 mm)

1.

Available on request.

www.st.com

Podobny numer części - ST1S09

Producent	Numer części	Arkusz danych	Szczegółowy opis
STMicroelectronics	ST1S09	416Kb / 18P	2A, 1.5 MHz PWM step-down switching regulator with synchronous rectification 05-Jul-2007
	ST1S09APU	416Kb / 18P	2A, 1.5 MHz PWM step-down switching regulator with synchronous rectification 05-Jul-2007
	ST1S09APU	417Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm 31-Jan-2008
	ST1S09IPU	416Kb / 18P	2A, 1.5 MHz PWM step-down switching regulator with synchronous rectification 05-Jul-2007
	ST1S09IPU	417Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm 31-Jan-2008

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Podobny opis - ST1S09

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List of Unclassifed Man...	BD9721FV	81Kb / 2P	1 CHANNEL STEP DOWN PWM SWITCHING REGULATOR CONTROLLER WITH SYNCHRONOUS RECTIFICATION
STMicroelectronics	L5988	114Kb / 10P	4A step-down switching regulator with synchronous rectification 08-Aug-2006
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	ST1S06XX	426Kb / 20P	Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or adjustable, step-down switching regulator 15-Apr-2008
	ST1S09	417Kb / 18P	2 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationtm 31-Jan-2008
	ST2S06A33	296Kb / 18P	Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator 28-Jul-2009
	ST1S30	193Kb / 11P	3 A, 1.5 MHz PWM step-down switching regulator with synchronous rectification 09-Sep-2010
	ST2S08B	757Kb / 18P	Dual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulator 18-May-2012

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