TK112xxCM
FEATURES
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VOLTAGE REGULATOR WITH ON/OFF SWITCH
APPLICATIONS
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Battery Powered Systems
Cellular Telephones
Pagers
Personal Communications Equipment
Portable Instrumentation
Portable Consumer Equipment
Radio Control Systems
Toys
Low Voltage Systems
High Precision Voltage at ± 1.5% or ± 50 mV
Active High On/Off Control
Very Low Dropout Voltage: (V
DROP
= 105 mV at 100 mA)
Very Good Stability: CL = 0.1
mF
is Stable for any
Type Capacitor with V
OUT
³
1.8 V (I
OUT
> 0.5 mA)
Excellent Ripple Rejection Ratio (80 dB @ 1 kHz)
Very Low Quiescent Current (I
Q
= 65
mA
at I
OUT
= 0 mA)
Peak Output Current is 480 mA
SOT23L-6 Surface Mount Package
Very Low Noise
Built-in Reverse Bias Protection
Internal Thermal Shutdown
Short Circuit Protection
The TK112xxCM circuit features very high stability in both
DC and AC. An output capacitor of 0.1
mF
provides stable
operation for V
OUT
³
2.5 V. Any type of capacitor can be
used; however, the larger this capacitor is, the better the
overall characteristics are. The ripple rejection ratio is 84 dB
at 400 Hz, and 80 dB at 1 kHz.
The TK112xxC is available in the SOT23L-6 surface mount
package.
DESCRIPTION
The TK112xxC 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 in the “on” state
when the control pin is pulled to a logic high level. An
external capacitor can be connected to the noise bypass pin
to lower the output noise level to 30 µVrms.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 170 mV (typ.) at 200 mA load current. The
TK112xxC has a very low quiescent current of 65 µA at no
load and 1.8 mA with a 100 mA load.The internal thermal
shut down circuitry limits the junction temperature to150 °C.
The load current is internally monitored and the device will
shut down in the presence of a short circuit or overcurrent
condition at the output.
TK112xxC
CONTROL
01S
VIN
GND
VOUT
GND
NOISE BYPASS
BLOCK DIAGRAM
VIN
VOUT
CONTROL CIRCUIT
CONSTANT
CURRENT
SOURCE
CONTROL
ORDERING INFORMATION
TK112
Voltage Code
Package Code
CM
Tape/Reel Code
Temp. Code
THERMAL
PROTECTION
BANDGAP
REFERENCE
VOLTAGE CODE:
Refer toTable 1
PACKAGE CODE:
M: SOT23L-6
TAPE/REEL CODE:
L: Tape Left
Reel Size = 1300 pcs.
GND
NOISE
BYPASS
TEMP. CODE:
C: -30 to +80°C
I: -40 to +85°C
January 2002 TOKO, Inc.
Page 1
TK112xxCM
ABSOLUTE MAXIMUM RATINGS TK112xxCM - C RANK
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note1) ................... 600 mW
Reverse Bias ............................................................. 6 V
Storage Temperature Range ..................... -55 to +150 °C
Operating Temperature Range ..................... -30 to +80 °C
Operating Voltage Range ............................ 1.8 to 14.5 V
Junction Temperature ........................................... 150 °C
TK112xxCM ELECTRICAL CHARACTERISTICS - C RANK
Test conditions: T
A
= 25 °C, V
IN
= V
OUT(TYP)
+ 1V, V
CONT
= 1.8 V, unless otherwise specified.
SYMBOL
V
OUT
Line Reg
PARAMETER
Output Voltage
Line Regulation
TEST CONDITIONS
I
OUT
= 5 mA (See table 1)
D
V = 5 V (V
IN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V)
I
OUT
= 5 mA to 100 mA
MIN
TYP
MAX
UNITS
± 1.5% or ± 50 mV
0
0.5
1.0
1.6
0.8
1.5
2.4
105
170
235
380
480
65
0
1.8
90
0.1
3.0
6
1.1
2.2
3.7
1.8
3.4
5.3
170
270
370
mV
%
%
%
%
%
%
mV
mV
mV
mA
mA
mA
mA
Load Reg
Load Regulation
2.5 V
£
V
OUT
£
5.0 V
I
OUT
= 5 mA to 200 mA
I
OUT
= 5 mA to 300 mA
I
OUT
= 5 mA to 100 mA
Load Reg
Load Regulation
1.5 V
£
V
OUT
£
2.4 V
I
OUT
= 5 mA to 200 mA
I
OUT
= 5 mA to 300 mA
I
OUT
= 100 mA
V
DROP
Dropout Voltage
(Note 2)
I
OUT
= 200 mA
I
OUT
= 300 mA (V
OUT
≥
2.4 V)
I
OUT
MAX
I
Q
I
STBY
I
GND
Maximum Output Current
Quiescent Current
Standby Current
Ground Pin Current
V
OUT
= V
OUT(TYP)
x 0.9
I
OUT
= 0 mA
Excluding I
CONT
V
CC
= 8 V, V
CONT
£
0.15 V OFF State
I
OUT
= 100 mA
CONTROL TERMINAL SPECIFICATION (Note 3)
I
CONT
V
CONT
Control Current
Control Voltage
OFF State
0.6
V
V
CONT
= 1.8 V, ON State
ON State
1.6
5
10
mA
V
Page 2
January 2002 TOKO, Inc.
TK112xxCM
TK112xxCM ELECTRICAL CHARACTERISTICS - C RANK (CONT)
Test conditions: T
A
= 25 °C, V
IN
= V
OUT(TYP)
+ 1V, V
CONT
= 1.8 V, unless otherwise specified.
SYMBOL
V
REF
DV
OUT
/D
T
A
V
NO
PARAMETER
Noise Bypass Terminal
Voltage
Temperature Coefficient
Output Noise
V
OUT
= 3 V, f = 1 kHz, C
N
= 0.1
mF
V
OUT
= 3 V, at BW 400 Hz to 80 kHz
f = 400 Hz, CL = 1.0
m
F, C
N
= 0.01
m
F, V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+ 1.5 V, I
OUT
= 10 mA
f = 1 kHz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+
1.5 V, I
OUT
= 10 mA
TEST CONDITIONS
MIN
TYP
1.28
35
0.20
45
84
MAX
UNITS
V
ppm / °C
m
V /
Ö
Hz
mV
RMS
dB
RR
Ripple Rejection
80
dB
Note 1: Power dissipation is 600 mW when mounted as recommended. Decrease at the rate of 4.8 mW/°C for operation above 25 °C.
Note 2: The minimum operating voltage for V
IN
can be 1.8 V. Also, the minimum voltage required for V
IN
is V
IN
= V
DROP
+ V
OUT
. As a result, operating
at V
OUT
£
2.0 V at the minimum input operating voltage is not preferred.
Note 3: The input current decreases to the pA level by connecting the control terminal to GND. (Off State). The internal Pull-down resistor is 500 kW.
General Note: Parameters with only typical values are just reference. (Not guaranteed)
General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless
otherwise noted. V
IN
= V
OUT(TYP)
+ 1 V; I
OUT
= 1mA (Tj = 25 °C) The operation of -30°C to 80°C is guaranteed in the design by a
usual inspection.
General Note: Exceeding the “Absolute Maximum Rating” may damage the device.
General Note: Connecting a capacitor to the noise bypass pin can decrease the output noise voltage.
January 2002 TOKO, Inc.
Page 3
TK112xxCM
ABSOLUTE MAXIMUM RATINGS TK112xxCM - I RANK
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note1) ................... 600 mW
Reverse Bias ............................................................. 6 V
Storage Temperature Range ..................... -55 to +150 °C
Operating Temperature Range ..................... -40 to +85 °C
Operating Voltage Range ............................ 2.1 to 14.5 V
Junction Temperature ........................................... 150 °C
TK112xxCM ELECTRICAL CHARACTERISTICS - I RANK
Test conditions: T
A
= 25 °C, V
IN
= V
OUT (TYP)
+ 1V, I
OUT
= 5 mA, unless otherwise specified. Boldface type applies over
the full operating temperature range. (-40~85°C).
SYMBOL
V
OUT
Line Reg
PARAMETER
Output Voltage
Line Regulation
TEST CONDITIONS
I
OUT
= 5 mA (See Table 1)
D
V = 5 V, (V
IN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V)
I
OUT
= 5 mA to 100 mA
MIN
TYP
MAX
UNITS
± 1.5% or ± 50 mV
(±2.5% or ± 80 mV)
0
0.5
1.0
1.6
0.8
1.5
2.4
105
170
235
380
340
480
65
0
1.8
90
100
0.1
0.5
3.0
3.6
6
8
1.1
1.3
2.2
2.8
3.7
5.3
1.8
2.0
3.4
4.1
5.3
6.5
170
200
270
320
370
440
mV
%
%
%
%
%
%
mV
mV
mV
Ma
mA
mA
mA
Load Reg
Load Regulation
2.5 V
£
V
OUT
£
5.0 V
I
OUT
= 5 mA to 200 mA
I
OUT
= 5 mA to 300 mA
I
OUT
= 5 mA to 100 mA
Load Reg
Load Regulation
1.5 V
£
V
OUT
£
2.4 V
I
OUT
= 5 mA to 200 mA
I
OUT
= 5 mA to 300 mA
I
OUT
= 100 mA
V
DROP
Dropout Voltage
(Note 2)
I
OUT
= 200 mA
I
OUT
= 300 mA (V
OUT
≥
2.4 V)
I
OUT
MAX
I
Q
I
STBY
I
GND
Maximum Output Current
Quiescent Current
Standby Current
Ground Pin Current
V
OUT
= V
OUT(TYP)
x 0.9
I
OUT
= 0 mA
Excluding I
CONT
OFF State
V
CONT
£
0.15 V
I
OUT
= 100 mA
Page 4
January 2002 TOKO, Inc.
TK112xxCM
TK112xxCM ELECTRICAL CHARACTERISTICS - I RANK (CONT)
Test conditions: T
A
= 25 °C, V
IN
= V
OUT (TYP)
+ 1V, I
OUT
= 5 mA, unless otherwise specified. Boldface type applies over
the full operating temperature range. (-40~85°C).
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
CONTROL TERMINAL SPECIFICATION (Note 3)
I
CONT
Control Current
V
CONT
= 1.8 V, ON State
ON State
V
CONT
Control Voltage
OFF State
V
REF
DV
OUT
/DT
A
V
NO
Noise Bypass Terminal
Voltage
Temperature Coefficient
Output Noise
V
OUT
= 3 V, f = 1 kHz, C
N
= 0.1
mF
V
OUT
= 3 V, at BW 400 Hz to 80 kHz
f = 400 Hz, CL = 1.0
m
F, C
N
= 0.01
m
F, V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+ 1.5 V, I
OUT
= 10 mA
f = 1 kHz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+
1.5 V, I
OUT
= 10 mA
1.28
35
0.20
45
84
0.6
0.35
V
V
ppm / °C
m
V /
Ö
Hz
mV
RMS
dB
1.6
1.8
5
10
12
mA
V
RR
Ripple Rejection
80
dB
Note 1: Power dissipation is 600 mW when mounted as recommended. Decrease at the rate of 4.8 mW/°C for operation above 25 °C.
Note 2: The minimum operating voltage for V
IN
can be 1.8 V. Also, the minimum voltage required for V
IN
is V
IN
= V
DROP
+ V
OUT
. As a result, operating
at V
OUT
£
2.0 V at the minimum input operating voltage is not preferred.
Note 3: The input current decreases to the pA level by connecting the control terminal to GND. (Off State). The internal Pull-down resistor is 500 kW.
General Note: Parameters with only typical values are just reference. (Not guaranteed)
General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless
otherwise noted. V
IN
= V
OUT(TYP)
+ 1 V; I
OUT
= 1mA (Tj = 25 °C) The operation of -30°C to 80°C is guaranteed in the design by a
usual inspection.
General Note: Exceeding the “Absolute Maximum Rating” may damage the device.
General Note: Connecting a capacitor to the noise bypass pin can decrease the output noise voltage.
January 2002 TOKO, Inc.
Page 5
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