LK112SM25TR SGS-Thomson-Microelectronics, LK112SM25TR Datasheet

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LK112SM25TR

Manufacturer Part Number
LK112SM25TR
Description
LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION
Manufacturer
SGS-Thomson-Microelectronics
Datasheet

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LK112SM25TR
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6 029
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 30 V
pass transistor is used to achieve a low dropout
voltage.
SCHEMATIC DIAGRAM
February 2003
OUTPUT CURRENT UP TO 200mA
LOW DROPOUT VOLTAGE (500mV MAX AT
I
VERY LOW QUIESCENT CURRENT: 0.1 A
IN OFF MODE AND MAX 250 A IN ON
MODE AT I
LOW OUTPUT NOISE: TYP 30 V AT
I
WIDE RANGE OF OUTPUT VOLTAGES
INTERNAL CURRENT AND THERMAL LIMIT
V
OUT
OUT
OUT
=200mA)
=60mA AND 10Hz<f<80KHz
TOLERANCE
OUT
=0mA
LOW NOISE LOW DROP VOLTAGE REGULATOR
2% (AT 25°C)
rms
. An internal PNP
WITH SHUTDOWN FUNCTION
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.
SOT23-5L
LK112S
SERIES
1/11

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LK112SM25TR Summary of contents

Page 1

LOW NOISE LOW DROP VOLTAGE REGULATOR OUTPUT CURRENT UP TO 200mA LOW DROPOUT VOLTAGE (500mV MAX AT I =200mA) OUT VERY LOW QUIESCENT CURRENT: 0 OFF MODE AND MAX 250 MODE AT I =0mA OUT ...

Page 2

LK112S SERIES ABSOLUTE MAXIMUM RATINGS Symbol V DC Input Voltage I V Shutdown Input Voltage SHDN I Output Current O T Storage Temperature Range stg T Operating Junction Temperature Range op CONNECTION DIAGRAM (top view) SOT23-5L ELECTRICAL CHARACTERISTICS FOR LK112 ...

Page 3

... ORDERING NUMBERS AND OUTPUT VOLTAGE Part Number Output Voltage LK112SM13TR 1.3V LK112SM14TR (*) 1.4V LK112SM15TR 1.5V LK112SM16TR 1.6V LK112SM17TR (*) 1.7V LK112SM18TR 1.8V LK112SM19TR (*) 1.9V LK112SM20TR (*) 2.0V LK112SM21TR 2.1V LK112SM22TR (*) 2.2V LK112SM23TR (*) 2.3V LK112SM24TR (*) 2.4V LK112SM25TR 2.5V LK112SM26TR (*) 2.6V LK112SM27TR (*) 2.7V LK112SM28TR 2.8V LK112SM29TR (*) 2.9V LK112SM30TR 3.0V LK112SM31TR (*) 3.1V LK112SM32TR 3.2V LK112SM33TR 3.3V LK112SM34TR (*) 3.4V LK112SM35TR (*) 3.5V LK112SM36TR 3.6V LK112SM37TR (*) 3.7V LK112SM38TR 3.8V LK112SM39TR (*) 3.9V LK112SM40TR 4.0V LK112SM41TR (*) 4.1V LK112SM42TR (*) 4.2V LK112SM43TR (*) 4 ...

Page 4

LK112S SERIES TYPICAL CHARACTERISTICS (unless otherwise specified T Figure 1 : Output Voltage vs Temperature Figure 2 : Output Voltage vs Temperature Figure 3 : Line Regulation vs Temperature 4/11 = 25° =2 ...

Page 5

Figure 7 : Output Voltage vs Input Voltage Figure 8 : Shutdown Voltage vs Temperature Figure 9 : Shutdown Current vs Shutdown Voltage Figure 10 : Supply Voltage Rejection vs Temperature Figure 11 : Supply Voltage Rejection vs Output Current ...

Page 6

LK112S SERIES Figure 13 : Supply Voltage Rejection vs Temperature Figure 14 : Quiescent Current vs Temperature Figure 15 : Quiescent Current vs Input Voltage 6/11 Figure 16 : Quiescent Current vs Shutdown Voltage Figure 17 : Quiescent Current vs ...

Page 7

Figure 19 : Stability Figure 20 : Spectrum Noise Figure 21 : Start-up Transient V =3.5V, V =2.5V 1.8V SHDN C =4 =10nF O BY Figure 22 : Start-up Transient V ...

Page 8

LK112S SERIES Figure 25 : Line Transient V =3.5 to 4.5V, V =2.5V, V =1.8V SHDN C =1nF Figure 26 : Load Transient V =3 =2.5V, V =1.8V, ...

Page 9

SOT23-5L MECHANICAL DATA mm. DIM. MIN. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2.80 E 2. 0.35 TYP MAX. MIN. 1.45 35.4 0.15 1.30 35.4 0.50 13.7 0.20 3.00 110.2 ...

Page 10

LK112S SERIES Tape & Reel SOT23-xL MECHANICAL DATA DIM. MIN 12 3.13 Bo 3.07 Ko 1.27 Po 3.9 P 3.9 10/11 mm. TYP MAX. MIN. 180 13.0 13.2 0.504 0.795 2.362 14.4 ...

Page 11

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. ...

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