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LK112SM18TR View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
LK112SM18TR Low noise low drop voltage regulator with shutdown function ST-Microelectronics
STMicroelectronics ST-Microelectronics
LK112SM18TR Datasheet PDF : 18 Pages
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LK112Sxx
Low noise low drop voltage regulator with shutdown function
Features
Output current up to 200 mA
Low dropout voltage (500 mV max at
IOUT = 200 mA)
Very low quiescent current: 0.1 µA in OFF
mode and max 250 µA in ON mode at
IOUT = 0 mA
Low output noise: typ 30 µV at IOUT = 60 mA
and 10 Hz < f < 80 kHz
Wide range of output voltages
Internal current and thermal limit
VOUT tolerance ± 2% (at 25 °C)
Operative input voltage from:
VOUT+0.5 to 14 V (for VOUT > 2 V)
or from 2.5 V to 14 V (for VOUT < 2 V)
Description
The LK112Sxx 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
SOT23-5L
capacitor can be used connected to the noise
bypass pin to lower the output noise level to 30
µVrms. An internal PNP pass transistor is used to
achieve a low dropout voltage.
The LK112Sxx has a very low quiescent current
in ON MODE while in OFF MODE the Iq is
reduced down to 100 nA 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.
Table 1. Device summary
Part numbers
LK112SXX13
LK112SXX24
LK112SXX36
LK112SXX14
LK112SXX26
LK112SXX37
LK112SXX15
LK112SXX17
LK112SXX27
LK112SXX28
LK112SXX38
LK112SXX39
LK112SXX18
LK112SXX29
LK112SXX40
LK112SXX19
LK112SXX31
LK112SXX41
LK112SXX20
LK112SXX21
LK112SXX32
LK112SXX33
LK112SXX42
LK112SXX43
LK112SXX22
LK112SXX34
LK112SXX44
LK112SXX23
LK112SXX35
LK112SXX45
LK112SXX46
LK112SXX47
LK112SXX48
LK112SXX49
LK112SXX50
LK112SXX55
LK112SXX60
LK112SXX80
December 2007
Rev 9
1/18
www.st.com
18
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