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LK112M46TR View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
LK112M46TR LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION ST-Microelectronics
STMicroelectronics ST-Microelectronics
LK112M46TR Datasheet PDF : 14 Pages
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LK112
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR
WITH SHUTDOWN FUNCTION
I OUTPUT CURRENT UP TO 150mA
I LOW DROPOUT VOLTAGE (350mV AT
IOUT=150mA)
I VERY LOW QUIESCENT CURRENT: 0.1µA
IN OFF MODE AND MAX 250µA IN ON
MODE AT IOUT=0mA
I LOW OUTPUT NOISE: TYP 30µV AT
IOUT=60mA AND 10Hz<f<80KHz
I WIDE RANGE OF OUTPUT VOLTGAES
I INTERNAL CURRENT AND THERMAL LIMIT
DESCRIPTION
The LK112 is a low dropout linear regulator with a
built in electronic switch. The internal switch can
be controlled by TTL or CMOS logic levels. The
device is ON state when the control pin is pulled to
a logic high level. An external capacitor can be
used connected to the noise bypass pin to lower
the output noise level to 30µVrms. An internal PNP
pass transistor is used to achieve a low dropout
voltage.
SOT23-5L
The LK112 has a very low quiescent current in ON
MODE while in OFF MODE the Iq is reduced
down to 100nA max. The internal thermal
shutdown circuitry limits the junction temperature
to below 150°C. The load current is internally
monitored and the device will shutdown in the
presence of a short circuit or overcurrent condition
at the output.
Figure 1: Schematic Diagram
January 2005
Rev. 8
1/14
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