LK112SM24TR [STMICROELECTRONICS]
LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION; 具有关断功能的低噪声低压降稳压器
| 型号： | LK112SM24TR |
| 厂家： | 
ST |
| 描述： | LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION |
| 文件： | 总11页 (文件大小：429K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LK112S
SERIES
LOW NOISE LOW DROP VOLTAGE REGULATOR
WITH SHUTDOWN FUNCTION
■
■
OUTPUT CURRENT UP TO 200mA
LOW DROPOUT VOLTAGE (500mV MAX AT
=200mA)
I
OUT
■
■
VERY LOW QUIESCENT CURRENT: 0.1µA
IN OFF MODE AND MAX 250µA IN ON
MODE AT I
=0mA
OUT
LOW OUTPUT NOISE: TYP 30µV AT
=60mA AND 10Hz<f<80KHz
SOT23-5L
I
OUT
■
■
■
WIDE RANGE OF OUTPUT VOLTAGES
INTERNAL CURRENT AND THERMAL LIMIT
V
TOLERANCE ± 2% (AT 25°C)
OUT
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 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.
the output noise level to 30µV . An internal PNP
rms
pass transistor is used to achieve a low dropout
voltage.
SCHEMATIC DIAGRAM
February 2003
1/11
LK112S SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter²
Value
Unit
V
DC Input Voltage
Shutdown Input Voltage
Output Current
16
16
V
V
I
V
SHDN
I
Internally limited
-55 to +150
-30 to +80
O
T
Storage Temperature Range
°C
°C
stg
T
Operating Junction Temperature Range
op
CONNECTION DIAGRAM (top view)
PIN DESCRIPTION
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.
SOT23-5L
4
5
OUT Output Port
IN
Input Port
ELECTRICAL CHARACTERISTICS FOR LK112 (T = 25°C, V =V
+1V (see Note 1), I
=0mA,
OUT
j
IN
OUT
V
=1.8V, C = 1 µF, C = 2.2µF, C
= 0.1µF unless otherwise specified)
SHDN
I
O
BYPASS
Symbol
Parameter
Test Conditions
ON MODE (except I
Min.
Typ.
175
Max.
250
0.1
Unit
µA
I
Quiescent Current
)
SHDN
d
OFF MODE V = 8V
V
= 0V
0
µA
I
SHDN
V
Output Voltage
Line Regulation
I
= 30mA
(see table)
0.7
O
O
∆V
V = V +1V to V +6V,
V
V
≤ 5.6V
20
40
mV
mV
mV
mV
V
O
I
O
O
O
O
V = V +1V to V +6V,
> 5.6V
0.8
I
O
O
O
O
O
O
∆V
Load Regulation
Dropout Voltage
I
I
I
I
= 1 to 60mA
15
30
O
= 1 to 200mA
30
90
V
= 60 mA (see Note 2)
= 200 mA (see Note 2)
0.17
0.35
0.24
0.5
d
V
I
Short Circuit Current
200
mA
dB
SC
SVR Supply Voltage Rejection
V = V +1.5V
C = 0.1µF
BYP
55
30
12
I
O
C
= 10µF f = 400Hz
I = 30mA
O
O
eN
Output Noise Voltage
B= 10Hz to 80KHz C
= 0.1µF
µVrms
µA
BYP
C
= 10µF V = V +1.5V,I = 60mA
I O O
O
I
Shutdown Input Current
Shutdown Input Logic
V
= 1.8V
Output ON
35
SHDN
SHDN
V
Output ON
Output OFF
1.8
V
V
SHDN
0.6
∆V /T Output Voltage
I = 10mA
O
0.09
mV/°C
O
j
Temperature Coefficient
Note 1: for version with output voltage less than 2V V =2.4V
IN
Note 2: only for version with output voltage more than 2.1V
2/11
LK112S SERIES
ORDERING NUMBERS AND OUTPUT VOLTAGE
V
Min
V
Max
Part Number
Output Voltage
Test Voltage
OUT
OUT
LK112SM13TR
LK112SM14TR (*)
LK112SM15TR
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
1.36V
1.46V
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
1.56V
LK112SM16TR
1.66V
LK112SM17TR (*)
LK112SM18TR
1.76V
1.86V
LK112SM19TR (*)
LK112SM20TR (*)
LK112SM21TR
1.96V
2.06V
2.16V
LK112SM22TR (*)
LK112SM23TR (*)
LK112SM24TR (*)
LK112SM25TR
2.26V
2.36V
2.46V
2.56V
LK112SM26TR (*)
LK112SM27TR (*)
LK112SM28TR
2.66V
2.76V
2.86V
LK112SM29TR (*)
LK112SM30TR
2.96V
3.06V
LK112SM31TR (*)
LK112SM32TR
3.16V
3.26V
LK112SM33TR
3.36V
LK112SM34TR (*)
LK112SM35TR (*)
LK112SM36TR
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
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
LK112SM37TR (*)
LK112SM38TR
LK112SM39TR (*)
LK112SM40TR
LK112SM41TR (*)
LK112SM42TR (*)
LK112SM43TR (*)
LK112SM44TR (*)
LK112SM45TR (*)
LK112SM46TR (*)
LK112SM47TR
LK112SM48TR (*)
LK112SM49TR (*)
LK112SM50TR
LK112SM55TR (*)
LK112M60TR
LK112SM80TR
(*) Available on request
3/11
LK112S SERIES
TYPICAL CHARACTERISTICS (unless otherwise specified T = 25°C, C =1µF, C =2.2µF, C =100nF)
BYP
j
I
O
Figure 1 : Output Voltage vs Temperature
Figure 2 : Output Voltage vs Temperature
Figure 3 : Line Regulation vs Temperature
Figure 4 : Load Regulation vs Temperature
Figure 5 : Dropout Voltage vs Temperature
Figure 6 : Short Circuit Currennt vs Dropout
Voltage
4/11
LK112S 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
Figure 12 : Supply Voltage Rejection vs
Voltage
Frequency
5/11
LK112S SERIES
Figure 13 : Supply Voltage Rejection vs
Figure 16 : Quiescent Current vs Shutdown
Temperature
Voltage
Figure 14 : Quiescent Current vs Temperature
Figure 15 : Quiescent Current vs Input Voltage
6/11
Figure 17 : Quiescent Current vs Output Current
Figure 18 : Reverse Current vs Reverse Voltage
LK112S SERIES
Figure 19 : Stability
Figure 22 : Start-up Transient
V =3.5V, V =2.5V, V
= 0 to 1.8V, R =68Ω, C =1µF, C =4.7µF,
L I O
I
O
SHDN
C
=100nF
BY
Figure 20 : Spectrum Noise
Figure 23 : Line Transient
V =3.5 to 4.5V, V =2.5V, V
=1.8V, I =30mA, No C , C =10µF,
O I O
I
O
SHDN
C =100nF, t =t =2µs
BY s f
Figure 21 : Start-up Transient
Figure 24 : Line Transient
V =3.5V, V =2.5V, V
= 0 to 1.8V, R =2.5KΩ, C =1µF,
V =3.5 to 4.5V, V =2.5V, V
=1.8V, I =30mA, No C , C =10µF,
SHDN O I O
I
O
SHDN
L
I
I
O
C =4.7µF, C =10nF
C
=10nF, t =t =2µs
O
BY
BY s f
7/11
LK112S SERIES
Figure 25 : Line Transient
Figure 27 : Load Transient
V =3.5 to 4.5V, V =2.5V, V
=1.8V, I =30mA, No C , C =1µF,
V =3.5V, V =2.5V, V
=1.8V, I =50 to 100mA, C 1µF,
SHDN O I
I
O
SHDN
O
I
O
I
O
C
=1nF, t =t =2µs
C =10µF, C =100nF, t =t =250ns
O BY s f
BY
s
f
Figure 26 : Load Transient
Figure 28 : Load Transient
V =3.5 V, V =2.5V, V
=1.8V, I =50 to 100mA, C =1µF,
V =4.8 V, V =3.8V, V
=1.8V, I =50 to 100mA, C =1µF,
SHDN O I
I
O
SHDN
O
I
I
O
C =2.2µF, C =10nF, t =t =250ns
C =2.2µF, C =10nF, t =t =250ns
O BY s f
O
BY
s
f
8/11
LK112S SERIES
SOT23-5L MECHANICAL DATA
mm.
mils
TYP.
DIM.
MIN.
0.90
0.00
0.90
0.35
0.09
2.80
2.60
1.50
TYP
MAX.
1.45
0.15
1.30
0.50
0.20
3.00
3.00
1.75
MIN.
35.4
0.0
MAX.
57.1
5.9
A
A1
A2
b
35.4
13.7
3.5
51.2
19.7
7.8
C
D
110.2
102.3
59.0
118.1
118.1
68.8
E
E1
e
0.95
1.9
37.4
74.8
e1
L
0.35
0.55
13.7
21.6
9/11
LK112S SERIES
Tape & Reel SOT23-xL MECHANICAL DATA
mm.
TYP
inch
TYP.
DIM.
MIN.
MAX.
180
MIN.
MAX.
7.086
0.519
A
C
12.8
20.2
60
13.0
13.2
0.504
0.795
2.362
0.512
D
N
T
14.4
3.33
3.27
1.47
4.1
0.567
0.131
0.128
0.0.58
0.161
0.161
Ao
Bo
Ko
Po
P
3.13
3.07
1.27
3.9
3.23
3.17
1.37
4.0
0.123
0.120
0.050
0.153
0.153
0.127
0.124
0.054
0.157
0.157
3.9
4.0
4.1
10/11
LK112S 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.
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11/11
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