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LK112M80TR Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer LK112M80TR
Beschreibung LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 12 Seiten
LK112M80TR Datasheet, Funktion
LK112
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR
WITH SHUTDOWN FUNCTION
s OUTPUT CURRENT UP TO 150mA
s LOW DROPOUT VOLTAGE (350mV AT
IOUT=150mA)
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 VOLTGAES
s 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 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
June 2003
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LK112M80TR Datasheet, Funktion
LK112 SERIES
Figure 7 : Output Voltage vs Input Voltage
Figure 10 : Supply Voltage Rejection vs
Temperature
Figure 8 : Shutdown Voltage vs Temperature
Figure 11 : Supply Voltage Rejection vs Output
Current
Figure 9 : Shutdown Current vs Shutdown
Voltage
Figure 12 : Supply Voltage Rejection vs
Frequency
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LK112M80TR pdf, datenblatt
LK112 SERIES
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
© The ST logo is a registered trademark of STMicroelectronics
© 2003 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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