STMicroelectronics LK112M43TR Low noise low drop voltage regulator with shutdown function Datasheet

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
1/12
LK112 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
VI
VSHDN
IO
Parameter²
Value
Unit
DC Input Voltage
16
V
Shutdown Input Voltage
16
V
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
Rthj-case Thermal Resistance Junction-case
Rthj-amb
Thermal Resistance Junction-ambient
CONNECTION DIAGRAM (top view)
1
2
3
4
5
2/12
81
°C/W
255
°C/W
PIN DESCRIPTION
Pin N° Symbol
SOT23-5L
Unit
SHDN
Name and Function
Shutdown Input: Disables the
regulator when is connected to GND
or to positive voltage less than 0.6V
GND Ground Pin: Internally connected to
the die attach flag to decrease the
total thermal resistance and increase
the package ability to dissipate
power.
Bypass Bypass Pin: Bypass with 0.1µF to
improve the Vref thermal noise
performances.
OUT Output Port
IN
Input Port
LK112 SERIES
ELECTRICAL CHARACTERISTICS FOR LK112 (Tj = 25°C, VIN=VOUT+1V (see Note 1), IOUT=0mA,
VSHDN=1.8V, CI = 1 µF, CO = 2.2µF, CBYPASS = 0.1µF unless otherwise specified)
Symbol
Id
Parameter
Test Conditions
Quiescent Current
ON MODE (except ISHDN)
VSHDN = 0V
Min.
Typ.
Max.
Unit
175
250
µA
0
0.1
µA
VO
Output Voltage
OFF MODE VI = 8V
IO = 30mA
∆VO
Line Regulation
VI = VO+1V to VO+6V,
VO ≤ 5.6V
0.7
20
mV
VI = VO+1V to VO+6V,
VO > 5.6V
∆VO
Load Regulation
Vd
IO
SVR
Dropout Voltage
(see table)
0.8
40
mV
IO = 1 to 60mA
15
30
mV
IO = 1 to 150mA
25
90
mV
IO = 60 mA (see Note 2)
0.17
0.24
V
IO = 150 mA (see Note 2)
0.29
0.35
V
Output Current Limit
150
mA
Supply Voltage Rejection
VI = VO+1.5V
CBYP = 0.1µF
CO = 10µF f = 400Hz
IO = 30mA
55
dB
Output Noise Voltage
B= 10Hz to 80KHz CBYP = 0.1µF
CO = 10µF VI = VO+1.5V,IO = 60mA
30
µVrms
ISHDN
Shutdown Input Current
VSHDN = 1.8V
VSHDN
Shutdown Input Logic
Output ON
Output OFF
IO = 10mA
eN
∆VO/Tj
Output Voltage
Temperature Coefficient
Output ON
12
35
µA
0.6
V
V
mV/°C
1.8
0.09
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
3/12
LK112 SERIES
ORDERING NUMBERS AND OUTPUT VOLTAGE
Part Number
LK112M13TR
LK112M14TR (*)
LK112M15TR
LK112M16TR
LK112M17TR
LK112M18TR
LK112M19TR (*)
LK112M20TR (*)
LK112M21TR
LK112M22TR (*)
LK112M23TR (*)
LK112M24TR (*)
LK112M25TR
LK112M26TR (*)
LK112M27TR (*)
LK112M28TR
LK112M29TR (*)
LK112M30TR
LK112M31TR (*)
LK112M32TR
LK112M33TR
LK112M34TR (*)
LK112M35TR (*)
LK112M36TR
LK112M37TR (*)
LK112M38TR
LK112M39TR (*)
LK112M40TR
LK112M41TR (*)
LK112M42TR (*)
LK112M43TR (*)
LK112M44TR (*)
LK112M45TR (*)
LK112M46TR (*)
LK112M47TR
LK112M48TR (*)
LK112M49TR (*)
LK112M50TR
LK112M55TR (*)
LK112M60TR
LK112M80TR
(*) Available on request
4/12
Output Voltage
VOUT Min
VOUT Max
Test Voltage
1.3V
1.4V
1.5V
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
5.5V
6.0V
8.0V
1.24V
1.34V
1.44V
1.54V
1.64V
1.74V
1.84V
1.94V
2.04V
2.14V
2.24V
2.34V
2.44V
2.54V
2.64V
2.74V
2.84V
2.94V
3.04V
3.14V
3.24V
3.335V
3.435V
3.535V
3.630V
3.725V
3.825V
3.920V
4.020V
4.120V
4.215V
4.315V
4.410V
4.510V
4.605V
4.705V
4.800V
4.900V
5.390V
5.880V
7.840V
1.36V
1.46V
1.56V
1.66V
1.76V
1.86V
1.96V
2.06V
2.16V
2.26V
2.36V
2.46V
2.56V
2.66V
2.76V
2.86V
2.96V
3.06V
3.16V
3.26V
3.36V
3.465V
3.565V
3.655V
3.770V
3.875V
3.975V
4.080V
4.180V
4.280V
4.385V
4.485V
4.590V
4.690V
4.795V
4.895V
5.000V
5.100V
5.610V
6.120V
8.160V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
5.1V
5.2V
5.3V
5.4V
5.5V
5.6V
5.7V
5.8V
5.9V
6.0V
6.5V
7.0V
9.0V
LK112 SERIES
TYPICAL CHARACTERISTICS (unless otherwise specified Tj = 25°C, CI=1µF, CO=2.2µF, CBYP=100nF)
Figure 1 : Output Voltage vs Temperature
Figure 4 : Load Regulation vs Temperature
Figure 2 : Output Voltage vs Temperature
Figure 5 : Dropout Voltage vs Temperature
Figure 3 : Line Regulation vs Temperature
Figure 6 : Short Circuit Currennt vs Dropout
Voltage
5/12
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
6/12
LK112 SERIES
Figure 13 : Supply Voltage Rejection vs
Temperature
Figure 16 : Quiescent Current vs Shutdown
Voltage
Figure 14 : Quiescent Current vs Temperature
Figure 17 : Quiescent Current vs Output Current
Figure 15 : Quiescent Current vs Input Voltage
Figure 18 : Reverse Current vs Reverse Voltage
7/12
LK112 SERIES
Figure 19 : Stability
Figure 22 : Start-up Transient
VI=3.5V, V O=2.5V, VSHDN = 0 to 1.8V, RL=68Ω, CI=1µF, CO=4.7µF,
CBY=100nF
Figure 20 : Spectrum Noise
Figure 23 : Line Transient
VI=3.5 to 4.5V, V O=2.5V, V SHDN=1.8V, I O=30mA, No CI, CO=10µF,
CBY=100nF, ts=tf=2µs
Figure 21 : Start-up Transient
Figure 24 : Line Transient
VI=3.5V, V O=2.5V, V SHDN= 0 to 1.8V, RL=2.5KΩ, CI=1µF,
CO=4.7µF, CBY=10nF
VI=3.5 to 4.5V, V O=2.5V, V SHDN=1.8V, I O=30mA, No CI, CO=10µF,
CBY=10nF, t s=tf=2µs
8/12
LK112 SERIES
Figure 25 : Line Transient
Figure 27 : Load Transient
VI=3.5 to 4.5V, V O=2.5V, VSHDN =1.8V, IO=30mA, No CI, CO=1µF,
CBY=1nF, t s=tf=2µs
VI=3.5V, V O=2.5V, V SHDN=1.8V, IO=50 to 100mA, CI1µF,
CO=10µF, CBY =100nF, ts=tf=250ns
Figure 26 : Load Transient
Figure 28 : Load Transient
VI=3.5 V, V O=2.5V, VSHDN=1.8V, IO=50 to 100mA, C I=1µF,
CO=2.2µF, CBY=10nF, t s=tf=250ns
VI=4.8 V, V O=3.8V, VSHDN=1.8V, IO=50 to 100mA, C I=1µF,
CO=2.2µF, CBY=10nF, t s=tf=250ns
9/12
LK112 SERIES
SOT23-5L MECHANICAL DATA
mm.
mils
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
0.90
1.45
35.4
57.1
A1
0.00
0.10
0.0
3.9
A2
0.90
1.30
35.4
51.2
b
0.35
0.50
13.7
19.7
C
0.09
0.20
3.5
7.8
D
2.80
3.00
110.2
118.1
E
1.50
1.75
59.0
68.8
e
0.95
37.4
H
2.60
3.00
102.3
118.1
L
0.10
0.60
3.9
23.6
.
7049676C
10/12
LK112 SERIES
Tape & Reel SOT23-xL MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
180
13.0
7.086
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
MAX.
0.504
0.512
14.4
0.519
0.567
Ao
3.13
3.23
3.33
0.123
0.127
0.131
Bo
3.07
3.17
3.27
0.120
0.124
0.128
Ko
1.27
1.37
1.47
0.050
0.054
0.0.58
Po
3.9
4.0
4.1
0.153
0.157
0.161
P
3.9
4.0
4.1
0.153
0.157
0.161
11/12
LK112 SERIES
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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.
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