ST890_09 datasheet(1/20 Pages) STMICROELECTRONICS

Part #	ST890

Description	1.2 A current limited high side power switch with thermal shutdown

PDF	20 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 20 page

March 2009

Rev 8

1/20

20

ST890

1.2 A current limited high side power switch

with thermal shutdown

Features

■ 2.7 V to 5.5 V input range

■ Programmable current limit up to 1.2 A

■ Low quiescent current

■ Thermal shutdown

■ Active low FAULT indicator output

■ 90 m

Ω (typ.) ON resistance

■ SO-8 and DFN8L (3 x 3 mm) packages

Applications

■ PCMCIA slots

■ Access bus slots

■ Portable equipment

Description

The ST890 is a low voltage, P-channel MOSFET

power switch intended for high side load switching

applications.

The switch operates with inputs from 2.7 V to

5.5 V, making it ideal for both 3 V and 5 V

systems.

The internal current limiting circuitry protects the

input supply against overload. The thermal

overload protection limits power dissipation and

junction temperatures.

The maximum current limit is 1.2 A. The current

limit through the switch is programmed with a

resistor from SET to ground. The devices are

available in SO-8 and DFN8L (3 x 3 mm)

packages.

DFN8L

(3x3mm)

SO-8

Table 1.

Device summary

Order code

Package

Packaging

ST890BDR

SO-8

2500 parts per reel

ST890CDR

SO-8

2500 parts per reel

ST890DTR

DFN8L (3 x 3 mm)

3000 parts per reel

www.st.com

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