Page 1
January, 1996 TOKO, Inc.
1-4-96
TK112xxA
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
s
High Voltage Precision at
2.4%
s
Active High On/Off Control
s
Very Low Dropout Voltage 80 mV at 30 mA
s
Very Low Noise
s
Very Small SOT-23L or SOT-89-5 Surface Mount
Packages
s
Internal Thermal Shutdown
s
Short Circuit Protection
APPLICATIONS
s
Battery Powered Systems
s
Cellular Telephones
s
Pagers
s
Personal Communications Equipment
s
Portable Instrumentation
s
Portable Consumer Equipment
s
Radio Control Systems
s
Toys
s
Low Voltage Systems
TK112 A
Voltage Code
Package Code
Tape/Reel Code
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
(SOT-23L)
TB : Tape Bottom
(SOT-89-5)
PACKAGE CODE
M: SOT-23L
U:
SOT-89-5
ORDERING INFORMATION
VOLTAGE CODE
20 = 2.0 V*
21 = 2.1 V
22 = 2.22 V*
25 = 2.5 V*
28 = 2.8 V*
29 = 2.9 V
30 = 3.0 V*
31 = 3.1 V*
33 = 3.3 V*
35 = 3.5 V*
36 = 3.6 V
38 = 3.8 V
40 = 4.0 V*
42 = 4.2 V
45 = 4.5 V*
48 = 4.8 V*
49 = 4.9 V
50 = 5.0 V*
55 = 5.5 V
* Indicates voltage is available in a SOT-89-5 package.
BLOCK DIAGRAM
S
S
S
S
S
S
S
S
S
S
S
V
OUT
GND
+
BANDGAP
REFERENCE
THERMAL
PROTECTION
+
S
NOISE BYPASS
S
S
S
S
S
S
V
IN
CONTROL
S
S
TK112XXA
P50
1
3
CONTROL
GND
6
4
V
IN
V
OUT
TK112xxA PO
2
5
GND
NOISE
BYPASS
1
3
6
4
2
5
VOUT
GND
NOISE
BYPASS
GND
CONTROL
VIN
DESCRIPTION
The TK112xxA 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
Vrms.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 70 mV (typ.) at 30 mA load current. The
TK112xxA has a very low quiescent current of 180
A at no
load and 1 mA with a 30 mA load. The standby current is
typically 100 nA. The internal thermal shutdown circuitry
limits the junction 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 TK112xxA is available in either 6 pin SOT-23L or 5 pin
SOT-89-5 surface mount packages.
Page 2
1-4-96
January, 1996 TOKO, Inc.
TK112xx A
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
IN
Quiescent Current
I
O
= 0 mA, Except I
CONT
170
350
A
I
STBY
Standby Current
V
IN
= 8 V, at output off
0.1
A
V
O
Output Voltage
I
O
= 30 mA
1.92
2.00
2.08
V
V
DROP
Dropout Voltage
I
O
= 60 mA
0.16
0.26
V
I
O
= 150 mA
0.29
0.4
V
I
O
Output Current
V
OUT
= 1.7 V
180
240
mA
I
OR
Recommended Output Current
150
mA
Line Reg
Line Regulation
V
IN
= 3 V
8 V
3.0
20
mV
Load Reg
Load Regulation
I
O
= 5 mA
60 mA (Note 3)
10
50
mV
I
O
= 5 mA
100 mA
20
100
mV
I
O
= 5 mA
150 mA
30
160
mV
RR
Ripple Rejection
100 mV(rms), I
O
= 10 mA
55
dB
V
O
/
T
A
Output Voltage
I
O
= 10 mA
0.2
mV/
C
Temperature Dependency
-20
C
T
A
+ 75
C
V
NO
Output Noise Voltage
10 Hz < f < 80 kHz,
30
V(rms)
I
O
= 30 mA
V
REF
Noise Bypass Terminal Voltage
1.25
V
Control Terminal Specification
I
CONT
Control Current
Output on, V
CONT
= 1.8 V
12
30
A
V
CONT
Control Voltage
Output on
1.8
V
Output off
0.6
V
t
r
Output Rise Time
I
O
= 30 mA,
0.3
ms
V
CONT
= 0 V
1.8 V
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note 1) ................. 400 mW
Power Dissipation SOT-89-5 (Note 2) ................ 800 mW
Storage Temperature Range ................... -55 to +150
C
Operating Temperature Range ...................-30 to +80
C
Lead Soldering Temp. (3 sec.) .............................. 230
C
Junction Temperature ........................................... 150
C
TK11220A ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25
C, V
IN
= 3.0 V, C
P
= 0.1
F, unless otherwise specified.
Note 1:
Power dissipation is 400 mW when mounted as recommended. Derate at 3.2 mW/
C for T
A
> 25
C.
Note 2:
Power dissipation is 800 mW when mounted as recommended. Derate at 6.4 mW/
C for T
A
> 25
C.
Note 3:
This is a pulse measurement where T
J
is constant. The output change due to temperature is not included.
Page 3
January, 1996 TOKO, Inc.
1-4-96
TK112xxA
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
IN
Quiescent Current
I
O
= 0 mA, Except I
CONT
170
350
A
I
STBY
Standby Current
V
IN
= 8 V, at output off
0.1
A
V
O
Output Voltage
I
O
= 30 mA
2.02
2.10
2.18
V
V
DROP
Dropout Voltage
I
O
= 60 mA
0.16
0.26
V
I
O
= 150 mA
0.29
0.4
V
I
O
Output Current
V
OUT
= 1.8 V
180
240
mA
I
OR
Recommended Output Current
150
mA
Line Reg
Line Regulation
V
IN
= 3.1 V
8.1 V
3.0
20
mV
Load Reg
Load Regulation
I
O
= 5 mA
60 mA (Note 1)
10
50
mV
I
O
= 5 mA
100 mA
20
100
mV
I
O
= 5 mA
150 mA
30
160
mV
RR
Ripple Rejection
100 mV(rms), I
O
= 10 mA
55
dB
V
O
/
T
A
Output Voltage
V
IN
= 3.5 V, I
O
= 10 mA
0.2
mV/
C
Temperature Dependency
-20
C
T
A
+ 75
C
V
NO
Output Noise Voltage
10 Hz < f < 80 kHz,
30
V(rms)
I
O
= 30 mA
V
REF
Noise Bypass Terminal Voltage
1.25
V
Control Terminal Specification
I
CONT
Control Current
Output on, V
CONT
= 1.8 V
12
30
A
V
CONT
Control Voltage
Output on
1.8
V
Output off
0.6
V
t
r
Output Rise Time
I
O
= 30 mA,
0.3
ms
V
CONT
= 0 V
1.8 V
TK11221A ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25
C, V
IN
= 3.1 V, C
P
= 0.1
F, unless otherwise specified.
Note 1:
This is a pulse measurement where T
J
is constant. The output change due to temperature is not included.
Page 4
1-4-96
January, 1996 TOKO, Inc.
TK112xx A
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
IN
Quiescent Current
I
O
= 0 mA, Except I
CONT
170
350
A
I
STBY
Standby Current
V
IN
= 8 V, at output off
0.1
A
V
O
Output Voltage
I
O
= 30 mA
2.14
2.22
2.3
V
V
DROP
Dropout Voltage
I
O
= 60 mA
0.16
0.26
V
I
O
= 150 mA
0.29
0.4
V
I
O
Output Current
V
OUT
= 1.92 V
180
240
mA
I
OR
Recommended Output Current
150
mA
Line Reg
Line Regulation
V
IN
= 3.22 V
8.22 V
3.0
20
mV
Load Reg
Load Regulation
I
O
= 5 mA
60 mA (Note 1)
10
50
mV
I
O
= 5 mA
100 mA
20
100
mV
I
O
= 5 mA
150 mA
30
160
mV
RR
Ripple Rejection
100 mV(rms), I
O
= 10 mA
55
dB
V
O
/
T
A
Output Voltage
V
IN
= 3.72 V, I
O
= 10 mA
0.05
mV/
C
Temperature Dependency
-20
C
T
A
+ 75
C
V
NO
Output Noise Voltage
10 Hz < f < 80 kHz,
30
V(rms)
I
O
= 30 mA
V
REF
Noise Bypass Terminal Voltage
1.25
V
Control Terminal Specification
I
CONT
Control Current
Output on, V
CONT
= 1.8 V
12
30
A
V
CONT
Control Voltage
Output on
1.8
V
Output off
0.6
V
t
r
Output Rise Time
I
O
= 30 mA,
0.3
ms
V
CONT
= 0 V
1.8 V
TK11222A ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25
C, V
IN
= 3.22 V, C
P
= 0.1
F, unless otherwise specified.
Note 1:
This is a pulse measurement where T
J
is constant. The output change due to temperature is not included.
Page 5
January, 1996 TOKO, Inc.
1-4-96
TK112xxA
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
IN
Quiescent Current
I
O
= 0 mA, Except I
CONT
170
350
A
I
STBY
Standby Current
V
IN
= 8 V, at output off
0.1
A
V
O
Output Voltage
I
O
= 30 mA
2.42
2.50
2.58
V
V
DROP
Dropout Voltage
I
O
= 60 mA
0.16
0.26
V
I
O
= 150 mA
0.29
0.4
V
I
O
Output Current
V
OUT
= 2.2 V
180
240
mA
I
OR
Recommended Output Current
150
mA
Line Reg
Line Regulation
V
IN
= 3.5 V
8.5 V (Note 1)
3.0
20
mV
Load Reg
Load Regulation
I
O
= 5 mA
60 mA
10
50
mV
I
O
= 5 mA
100 mA
20
100
mV
I
O
= 5 mA
150 mA
30
160
mV
RR
Ripple Rejection
100 mV(rms), I
O
= 10 mA
55
dB
V
O
/
T
A
Output Voltage
V
IN
= 4.0 V, I
O
= 10 mA
0.05
mV/
C
Temperature Dependency
-20
C
T
A
+ 75
C
V
NO
Output Noise Voltage
10 Hz < f < 80 kHz,
30
V(rms)
I
O
= 30 mA
V
REF
Noise Bypass Terminal Voltage
1.25
V
Control Terminal Specification
I
CONT
Control Current
Output on, V
CONT
= 1.8 V
12
30
A
V
CONT
Control Voltage
Output on
1.8
V
Output off
0.6
V
t
r
Output Rise Time
I
O
= 30 mA,
0.3
ms
V
CONT
= 0 V
1.8 V
TK11225A ELECTRICAL CHARACTERISTICS
Test conditions: T
A
= 25
C, V
IN
= 3.5 V, C
P
= 0.1
F, unless otherwise specified.
Note 1:
This is a pulse measurement where T
J
is constant. The output change due to temperature is not included.
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