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Partno	Mfg	Dc	Qty	Available	Descript
ST890B	ST	N/a	380	avai	1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN
ST890C	STMicroelectronics	N/a	76	avai	1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN
ST890C	ST	N/a	76	avai	1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN

ST890B ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNapplications are:Internal current limiting circuitry protects the input PCMCIA slots, Access bus sl ..
ST890BDR ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNST8901.2A CURRENT LIMITED HIGH SIDE WITHTHERMAL SHUTDOWN■ 2.7V TO 5.5V INPUT RANGE■ PROGRAMMABLE CU ..
ST890C ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
ST890C ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNST8901.2A CURRENT LIMITED HIGH SIDE WITHTHERMAL SHUTDOWN■ 2.7V TO 5.5V INPUT RANGE■ PROGRAMMABLE CU ..
ST890CD ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNST8901.2A CURRENT LIMITED HIGH SIDE WITHTHERMAL SHUTDOWN■ 2.7V TO 5.5V INPUT RANGE■ PROGRAMMABLE CU ..
ST890CDR ,1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWNapplications are:Internal current limiting circuitry protects the input PCMCIA slots, Access bus sl ..
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ST890B-ST890C
1.2 CURRENT LIMITED HIGH SIDE WITH THERMAL SHUTDOWN
1/8October 2003 2.7VTO 5.5V INPUT RANGE PROGRAMMABLE CURRENT LIMITUPTO
1.2A LOW QUIESCENT CURRENT THERMAL SHUTDOWN FAULT INDICATOR OUTPUT 90mΩ (TYP.)ON RESISTANCE SO-8 PACKAGE
DESCRIPTION
The ST890isalow voltage, P-Channel MOSFET
power switch intendedfor high side load switching
applications.
This switch operates with inputs from 2.7Vto
5.5V, makingit idealfor both3V and5V systems.
Internal current limiting circuitry protectsthe input
supply against overload. Thermal overload
protection limits power dissipation and junction
temperatures.
The ST890’s maximum current limitsis 1.2A. The
current limit throughthe switchis programed with resistor from SETto ground. The ST890is
availablein SO-8 package. Main applications are:
PCMCIA slots, Access bus slots, Portable
equipment.
ORDERING CODES
ST890
1.2A CURRENT LIMITED HIGH SIDE WITH
THERMAL SHUTDOWN
SCHEMATIC DIAGRAM
ST890
2/8
ABSOLUTE MAXIMUM RATINGS
AbsoluteMaximum Ratingsare those values beyond which damagetothe devicemay occur. Functional operation under these conditionis
not implied.
THERMAL DATA
(*)This value dependsfrom thermal designofPCBon whichthe deviceis mounted.
TRUTH TABLE FOR ON/OFF SWICH CONNECTION DIAGRAM (top view)
PIN DESCRIPTION
ST890
3/8
ELECTRICAL CHARACTERISTICS(VIN =3V,TA=TMINtoTMAX, unless otherwise specified. Typical
valuesareatTA =25°C)
TIMINGL CHARACTERISTICS (VIN=3V,TA =TMINto TMAX, unless otherwise specified. Typical values
areatTA =25°C)
ST890
4/8
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specifiedTj =25°C
Figure1:ON Resistancevs Supply Voltage
Figure2:ON Resistancevs Supply Voltage
Figure3:ON Resistancevs Temperature
Figure4: Output Voltagevs Input Voltage
ST890
5/8
Figure5: Switching Waveforms, Figure6: Switching Waveforms,

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