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PDF ( 数据手册 , 数据表 ) LK112SM24TR

零件编号 LK112SM24TR
描述 LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION
制造商 STMicroelectronics
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LK112SM24TR 数据手册, 描述, 功能
LK112S
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR
WITH SHUTDOWN FUNCTION
s OUTPUT CURRENT UP TO 200mA
s LOW DROPOUT VOLTAGE (500mV MAX AT
IOUT=200mA)
s VERY LOW QUIESCENT CURRENT: 0.1µA
IN OFF MODE AND MAX 250µA IN ON
MODE AT IOUT=0mA
s LOW OUTPUT NOISE: TYP 30µV AT
IOUT=60mA AND 10Hz<f<80KHz
s WIDE RANGE OF OUTPUT VOLTAGES
s INTERNAL CURRENT AND THERMAL LIMIT
s VOUT TOLERANCE ± 2% (AT 25°C)
DESCRIPTION
The LK112S 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 LK112S 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 juntion 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.
SCHEMATIC DIAGRAM
February 2003
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LK112SM24TR pdf, 数据表
LK112S SERIES
Figure 25 : Line Transient
Figure 27 : Load Transient
VI=3.5 to 4.5V, VO=2.5V, VSHDN=1.8V, IO=30mA, No CI, CO=1µF,
CBY=1nF, ts=tf=2µs
Figure 26 : Load Transient
VI=3.5V, VO=2.5V, VSHDN=1.8V, IO=50 to 100mA, CI1µF,
CO=10µF, CBY=100nF, ts=tf=250ns
Figure 28 : Load Transient
VI=3.5 V, VO=2.5V, VSHDN=1.8V, IO=50 to 100mA, CI=1µF,
CO=2.2µF, CBY=10nF, ts=tf=250ns
VI=4.8 V, VO=3.8V, VSHDN=1.8V, IO=50 to 100mA, CI=1µF,
CO=2.2µF, CBY=10nF, ts=tf=250ns
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零件编号描述制造商
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