ST890B_07 Datasheet, PDF (1/17 Pages) STMicroelectronics – 1.2 A current limited high side power switch with thermal shutdown

ST890B
ST890C, ST890D
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 mΩ (typ.) ON resistance
■ SO-8 and DFN8L (3 x 3 mm) packages
Applications
■ PCMCIA slots
■ Access bus slots
■ Portable equipment
SO-8
DFN8L
(3 x 3 mm)
Description
The ST890B, ST890C and ST890D are low
voltage, P-channel MOSFET power switches
intended for high side load switching applications.
These switches operate 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.
Table 1.
Device summary
Order code
ST890BDR
ST890CDR
ST890DTR
December 2007
Package
SO-8
SO-8
DFN8L (3 x 3 mm)
Rev 6
Packaging
2500 parts per reel
2500 parts per reel
3000 parts per reel
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