SGS Thomson Microelectronics LK112M80TR, LK112M60TR, LK112M55TR, LK112M50TR, LK112M49TR Datasheet
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1/12June 2003
■ OUTPUT CURRENT UP TO 150mA
■ LOW DROPOUT VOLTAGE (350mV AT
I
OUT
=150mA)
■ VERY LOW QUIESCENT CURRENT: 0.1µA
IN OFF MODE AND MAX 250µA IN ON
MODE AT I
OUT
=0mA
■ LOW OUTPUT NOISE: TYP 30µV AT
I
OUT
=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 30µV
rms
. An internal PNP
pass transistor is used t o achieve a low dropout
voltage.
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.
LK112
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR
WITH SH UTDOWN FUNCTI ON
SCHEMATIC DIAGRAM
SOT23-5L
LK112 SERIES
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ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
CONNECTION DIAGRAM (top view) PIN DESCRIPTION
Symbol Parameter² Value Unit
V
I
DC Input Voltage
16 V
V
SHDN
Shutdown Input Voltage
16 V
I
O
Output Current
Internally limited
T
stg
Storage Temperature Range
-55 to +150 °C
T
op
Operating Junction Temperature Range
-30 to +125 °C
Symbol Parameter SOT23-5L Unit
R
thj-case
Thermal Resistance Junction-case
81 °C/W
R
thj-amb
Thermal Resistance Junction-ambient
255 °C/W
SOT23-5L
Pin N° Symbol Name and Function
1 SHDN Shutdown Input: Disables the
regulator when is connected to GND
or to positive voltage less than 0.6V
2 GND Ground Pin: Internally connected to
the die attach flag to decrease the
total thermal resistance and increase
the package ability to dissipate
power.
3 Bypass Bypass Pin: Bypass with 0.1µF to
improve the Vref thermal noise
performances.
4 OU T Output Port
5 IN Input Port
LK112 SERIES
3/12
ELECTRICAL CHARACTERISTICS FOR LK112 (Tj = 25°C, VIN=V
OUT
+1V (see Note 1), I
OUT
=0mA,
V
SHDN
=1.8V, CI = 1 µF, CO = 2.2µ F, C
BYPASS
= 0.1µF unless otherwise specified)
Note 1: fo r version with output volt age less than 2V VIN=2.4V
Note 2: only for version with output voltage more than 2.1V
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
d
Quiescent Current ON MODE (except I
SHDN
) 175 250 µA
OFF MODE V
I
= 8V V
SHDN
= 0V 0 0.1 µA
V
O
Output Voltage IO = 30mA (see table)
∆V
O
Line Regulation VI = VO+1V to VO+6V, VO ≤ 5.6V 0.7 20 mV
V
I
= VO+1V to VO+6V, VO > 5.6V 0.8 40 mV
∆V
O
Load Regulation IO = 1 to 60mA 15 30 mV
I
O
= 1 to 150mA 25 90 mV
V
d
Dropout Voltage IO = 60 mA (see Note 2) 0.17 0.24 V
I
O
= 150 mA (see Note 2) 0.29 0.35 V
I
O
Output Current Limit 150 mA
SVR Supply Voltage Rejection V
I
= VO+1.5V C
BYP
= 0.1µF
C
O
= 10µF f = 400Hz IO = 30mA
55 dB
eN Output Noise Voltage B= 10Hz to 80KHz C
BYP
= 0.1µF
C
O
= 10µFVI = VO+1.5V,IO = 60mA
30 µVrms
I
SHDN
Shutdown Input Current V
SHDN
= 1.8V Output ON 12 35 µA
V
SHDN
Shutdown Input Logic Output ON
Output OFF
1.8
0.6
V
V
∆V
O/Tj
Output Voltage
Temperature Coefficient
IO = 10mA 0.09 mV/°C
LK112 SERIES
4/12
ORDERING NUMBERS AND OUTPUT VOLTAGE
(*) Avai l abl e on request
Part Number Output Voltage
V
OUT
Min V
OUT
Max
Test Voltage
LK112M13TR 1.3V 1.24V 1.36V 2.4V
LK112M14TR (*) 1.4V 1.34V 1.46V 2.4V
LK112M15TR 1.5V 1.44V 1.56V 2.4V
LK112M16TR 1.6V 1.54V 1.66V 2.4V
LK112M17TR 1.7V 1.64V 1.76V 2.4V
LK112M18TR 1.8V 1.74V 1.86V 2.4V
LK112M19TR (*) 1.9V 1.84V 1.96V 2.4V
LK112M20TR (*) 2.0V 1.94V 2.06V 3.0V
LK112M21TR 2.1V 2.04V 2.16V 3.1V
LK112M22TR (*) 2.2V 2.14V 2.26V 3.2V
LK112M23TR (*) 2.3V 2.24V 2.36V 3.3V
LK112M24TR (*) 2.4V 2.34V 2.46V 3.4V
LK112M25TR 2.5V 2.44V 2.56V 3.5V
LK112M26TR (*) 2.6V 2.54V 2.66V 3.6V
LK112M27TR (*) 2.7V 2.64V 2.76V 3.7V
LK112M28TR 2.8V 2.74V 2.86V 3.8V
LK112M29TR (*) 2.9V 2.84V 2.96V 3.9V
LK112M30TR 3.0V 2.94V 3.06V 4.0V
LK112M31TR (*) 3.1V 3.04V 3.16V 4.1V
LK112M32TR 3.2V 3.14V 3.26V 4.2V
LK112M33TR 3.3V 3.24V 3.36V 4.3V
LK112M34TR (*) 3.4V 3.335V 3.465V 4.4V
LK112M35TR (*) 3.5V 3.435V 3.565V 4.5V
LK112M36TR 3.6V 3.535V 3.655V 4.6V
LK112M37TR (*) 3.7V 3.630V 3.770V 4.7V
LK112M38TR 3.8V 3.725V 3.875V 4.8V
LK112M39TR (*) 3.9V 3.825V 3.975V 4.9V
LK112M40TR 4.0V 3.920V 4.080V 5.0V
LK112M41TR (*) 4.1V 4.020V 4.180V 5.1V
LK112M42TR (*) 4.2V 4.120V 4.280V 5.2V
LK112M43TR (*) 4.3V 4.215V 4.385V 5.3V
LK112M44TR (*) 4.4V 4.315V 4.485V 5.4V
LK112M45TR (*) 4.5V 4.410V 4.590V 5.5V
LK112M46TR (*) 4.6V 4.510V 4.690V 5.6V
LK112M47TR 4.7V 4.605V 4.795V 5.7V
LK112M48TR (*) 4.8V 4.705V 4.895V 5.8V
LK112M49TR (*) 4.9V 4.800V 5.000V 5.9V
LK112M50TR 5.0V 4.900V 5.100V 6.0V
LK112M55TR (*) 5.5V 5.390V 5.610V 6.5V
LK112M60TR 6.0V 5.880V 6.120V 7.0V
LK112M80TR 8.0V 7.840V 8.160V 9.0V
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