SGS Thomson Microelectronics LK112M80TR, LK112M60TR, LK112M55TR, LK112M50TR, LK112M49TR Datasheet
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LK112
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION
■OUTPUT CURRENT UP TO 150mA
■LOW DROPOUT VOLTAGE (350mV AT IOUT=150mA)
■VERY LOW QUIESCENT CURRENT: 0.1μA IN OFF MODE AND MAX 250μA IN ON MODE AT IOUT=0mA
■LOW OUTPUT NOISE: TYP 30μV AT IOUT=60mA AND 10Hz<f<80KHz
■WIDE RANGE OF OUTPUT VOLTGAES
■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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LK112 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter² |
Value |
Unit |
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VI |
DC Input Voltage |
16 |
V |
VSHDN |
Shutdown Input Voltage |
16 |
V |
IO |
Output Current |
Internally limited |
|
Tstg |
Storage Temperature Range |
-55 to +150 |
°C |
Top |
Operating Junction Temperature Range |
-30 to +125 |
°C |
THERMAL DATA
Symbol |
Parameter |
SOT23-5L |
Unit |
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|
Rthj-case |
Thermal Resistance Junction-case |
81 |
°C/W |
Rthj-amb |
Thermal Resistance Junction-ambient |
255 |
°C/W |
CONNECTION DIAGRAM (top view) |
PIN DESCRIPTION |
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Pin N° |
Symbol |
Name and Function |
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1 |
SHDN |
Shutdown Input: Disables the |
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regulator when is connected to GND |
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or to positive voltage less than 0.6V |
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2 |
GND |
Ground Pin: Internally connected to |
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the die attach flag to decrease the |
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total thermal resistance and increase |
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the package ability to dissipate |
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power. |
SOT23-5L |
3 |
Bypass |
Bypass Pin: Bypass with 0.1μF to |
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improve the Vref thermal noise |
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performances. |
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4 |
OUT |
Output Port |
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5 |
IN |
Input Port |
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LK112 SERIES
ELECTRICAL CHARACTERISTICS FOR LK112 (Tj = 25°C, V IN=VOUT+1V (see Note 1), IOUT=0mA, VSHDN=1.8V, CI = 1 μF, CO = 2.2μF, CBYPASS = 0.1μF unless otherwise specified)
Symbol |
Parameter |
|
Test Conditions |
Min. |
Typ. |
|
Max. |
Unit |
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Id |
Quiescent Current |
ON MODE (except ISHDN) |
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175 |
|
250 |
μA |
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OFF MODE |
VI = 8V |
VSHDN = 0V |
|
0 |
|
0.1 |
μA |
|
VO |
Output Voltage |
IO = 30mA |
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|
|
(see table) |
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||
VO |
Line Regulation |
VI = VO+1V to VO+6V, |
VO ≤ 5.6V |
|
0.7 |
|
20 |
mV |
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VI = VO+1V to VO+6V, |
VO > 5.6V |
|
0.8 |
|
40 |
mV |
||
VO |
Load Regulation |
IO = 1 to 60mA |
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15 |
|
30 |
mV |
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IO = 1 to 150mA |
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|
25 |
|
90 |
mV |
|
Vd |
Dropout Voltage |
IO = 60 mA (see Note 2) |
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0.17 |
|
0.24 |
V |
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IO = 150 mA (see Note 2) |
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0.29 |
|
0.35 |
V |
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IO |
Output Current Limit |
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150 |
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|
mA |
SVR |
Supply Voltage Rejection |
VI = VO+1.5V |
CBYP = 0.1μF |
|
55 |
|
|
dB |
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CO = 10μF |
f = 400Hz |
IO = 30mA |
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eN |
Output Noise Voltage |
B= 10Hz to 80KHz |
CBYP = 0.1μF |
|
30 |
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μVrms |
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CO = 10μF VI = VO+1.5V,IO = 60mA |
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ISHDN |
Shutdown Input Current |
VSHDN = 1.8V |
Output ON |
|
12 |
|
35 |
μA |
||
VSHDN |
Shutdown Input Logic |
Output ON |
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1.8 |
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V |
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Output OFF |
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0.6 |
V |
VO/Tj |
Output Voltage |
IO = 10mA |
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0.09 |
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mV/°C |
|
Temperature Coefficient |
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Note 1: for version with output voltage less than 2V VIN=2.4V
Note 2: only for version with output voltage more than 2.1V
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LK112 SERIES
ORDERING NUMBERS AND OUTPUT VOLTAGE
Part Number |
Output Voltage |
VOUT Min |
VOUT Max |
Test Voltage |
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LK112M13TR |
1.3V |
1.24V |
1.36V |
2.4V |
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LK112M14TR (*) |
1.4V |
1.34V |
1.46V |
2.4V |
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LK112M15TR |
1.5V |
1.44V |
1.56V |
2.4V |
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LK112M16TR |
1.6V |
1.54V |
1.66V |
2.4V |
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LK112M17TR |
1.7V |
1.64V |
1.76V |
2.4V |
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LK112M18TR |
1.8V |
1.74V |
1.86V |
2.4V |
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LK112M19TR (*) |
1.9V |
1.84V |
1.96V |
2.4V |
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LK112M20TR (*) |
2.0V |
1.94V |
2.06V |
3.0V |
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LK112M21TR |
2.1V |
2.04V |
2.16V |
3.1V |
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LK112M22TR (*) |
2.2V |
2.14V |
2.26V |
3.2V |
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LK112M23TR (*) |
2.3V |
2.24V |
2.36V |
3.3V |
LK112M24TR (*) |
2.4V |
2.34V |
2.46V |
3.4V |
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LK112M25TR |
2.5V |
2.44V |
2.56V |
3.5V |
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LK112M26TR (*) |
2.6V |
2.54V |
2.66V |
3.6V |
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LK112M27TR (*) |
2.7V |
2.64V |
2.76V |
3.7V |
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LK112M28TR |
2.8V |
2.74V |
2.86V |
3.8V |
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LK112M29TR (*) |
2.9V |
2.84V |
2.96V |
3.9V |
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LK112M30TR |
3.0V |
2.94V |
3.06V |
4.0V |
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LK112M31TR (*) |
3.1V |
3.04V |
3.16V |
4.1V |
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LK112M32TR |
3.2V |
3.14V |
3.26V |
4.2V |
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LK112M33TR |
3.3V |
3.24V |
3.36V |
4.3V |
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LK112M34TR (*) |
3.4V |
3.335V |
3.465V |
4.4V |
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LK112M35TR (*) |
3.5V |
3.435V |
3.565V |
4.5V |
LK112M36TR |
3.6V |
3.535V |
3.655V |
4.6V |
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LK112M37TR (*) |
3.7V |
3.630V |
3.770V |
4.7V |
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LK112M38TR |
3.8V |
3.725V |
3.875V |
4.8V |
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LK112M39TR (*) |
3.9V |
3.825V |
3.975V |
4.9V |
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LK112M40TR |
4.0V |
3.920V |
4.080V |
5.0V |
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LK112M41TR (*) |
4.1V |
4.020V |
4.180V |
5.1V |
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LK112M42TR (*) |
4.2V |
4.120V |
4.280V |
5.2V |
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LK112M43TR (*) |
4.3V |
4.215V |
4.385V |
5.3V |
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LK112M44TR (*) |
4.4V |
4.315V |
4.485V |
5.4V |
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LK112M45TR (*) |
4.5V |
4.410V |
4.590V |
5.5V |
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LK112M46TR (*) |
4.6V |
4.510V |
4.690V |
5.6V |
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LK112M47TR |
4.7V |
4.605V |
4.795V |
5.7V |
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LK112M48TR (*) |
4.8V |
4.705V |
4.895V |
5.8V |
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LK112M49TR (*) |
4.9V |
4.800V |
5.000V |
5.9V |
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LK112M50TR |
5.0V |
4.900V |
5.100V |
6.0V |
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LK112M55TR (*) |
5.5V |
5.390V |
5.610V |
6.5V |
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LK112M60TR |
6.0V |
5.880V |
6.120V |
7.0V |
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LK112M80TR |
8.0V |
7.840V |
8.160V |
9.0V |
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(*) Available on request |
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