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LK112M31TR Fiches technique(PDF) 1 Page - STMicroelectronics

No de pièce LK112M31TR
Description  Low noise low drop voltage regulator with shutdown function
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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July 2008
Rev 15
1/17
17
LK112xx
Low noise low drop voltage regulator with shutdown function
Features
Output current up to 150 mA
Low dropout voltage (350 mV at IOUT = 50 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
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 LK112xx 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 30 µVrms. An internal
PNP pass transistor is used to achieve a low
dropout voltage.
The LK112xx 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.
SOT23-5L
Table 1.
Device summary
Part numbers
LK112XX14
LK112XX24
LK112XX35
LK112XX45
LK112XX15
LK112XX25
LK112XX37
LK112XX46
LK112XX18
LK112XX26
LK112XX39
LK112XX48
LK112XX19
LK112XX29
LK112XX41
LK112XX49
LK112XX20
LK112XX31
LK112XX42
LK112XX50
LK112XX22
LK112XX33
LK112XX43
LK112XX60
LK112XX23
LK112XX34
LK112XX44
LK112XX80
www.st.com


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