TK112xxCM/U
APPLICATION MANUAL
LDO REGULATOR WITH ON/OFF SWITCH
TK112xxCM/U
GC3-H026H
Page 1
TK112xxCM/U
Features
·
Very low Dropout Voltage. (Vdrop=105mV at 100mA)
·
Very good stability (CL=0.1mF is stable for any type capacitor with 2.5V
£
Vout)
·
High Precision output Voltage (±1.5% or
±50mV)
·
Good ripple rejection ratio (80dB at 1kHz)
·
Wide operating voltage range (1.8V
~
14.5V)
·
Peak output current is 480mA.(10% down point)
·
Built-in Short circuit protection
·
Built-in Thermal Shutdown
·
Suitable for Very Low Noise Applications
·
Built-in on/off Control (0.1mA Max Standby current) High On
·
Very Small Surface Mount Packages SOT23L / SOT89 package
·
Built-in reverse bias over current protection
Description
The TK112xxC is an integrated circuit with a silicon monolithic bipolar structure. The regulator is of the low saturation
voltage output type with very little quiescent current (65mA).
The PNP power transistor is built-in. The I/O voltage difference is 0.17V (typical) when a current of 200mA is supplied
to the system. Because of the low voltage drop, the voltage source can be effectively used; this makes it very suitable for
battery powered equipment.
The on/off function is built into the IC. The current during standby mode becomes very small (pA level).
The output voltage is available from 1.5 to 10.0V in 0.1V steps. The output voltage is trimmed with high accuracy. This
allows the optimum voltage to be selected for the equipment.
The over current sensor circuit and the reverse-bias protection circuit are built-in.
It is a very rugged design because the ESD protection is high. Therefore, the TK112xxC can be used with confidence.
When mounted on the PCB, the power dissipation rating becomes about 600mW/ 900mW, even though the packages are
very small.
The TK112xxC features very high stability in both DC and AC.
The capacitor on the output side provides stable operation with 0.1mF with 2.5V
£
Vout. A capacitor of any type can be
used; however, the larger this capacitor is, the better the overall characteristics are.
GC3-H026H
Page 2
TK112xxCM/U
ORDERING INFORMATION
T K 1 1 2
Voltage Code
(Refer to the following table)
Version
C
Package Code
M : SOT23L-6
U : SOT89-5
C
-
Environment Code
-GH : Lead Free and Halogen Free (SOT23L-6)
-G : Lead Free (SOT89-5)
Tape / Reel Code
L : Left Type (SOT23L-6)
B : Back Type (SOT89-5)
Rank Code
C : C Rank
I : I Rank
Voltage Code
V OUT
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
V CODE
15
16
17
18
19
20
21
22
23
24
V OUT
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
V CODE
25
26
27
28
29
30
31
32
33
34
V OUT
3.5
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
V CODE
35
36
37
38
39
40
41
42
43
44
V OUT
4.5
4.6
4.7
4.8
4.9
5.0
V CODE
45
46
47
48
49
50
GC3-H026H
Page 3
TK112xxCM/U
Absolute Maximum Ratings
Ta=25°C
Parameter
Absolute Maximum Ratings
Symbol
Vcc
MAX
Vrev
MAX
Vnp
MAX
Vcont
MAX
T
stg
P
D
T
OP
V
OP
Rating
-0.4 ~ 16
-0.4 ~ 6
-0.4 ~ 12
-0.4 ~ 5
-0.4 ~ 16
-55 ~ 150
SOT23L-6: 600
SOT89-5: 900
-40 ~ 85
2.1 ~ 14.5
1.8 ~ 14.5
Units
V
V
V
V
V
°C
mW
°C
V
V
Conditions
Supply Voltage
Reverse Bias
Np pin Voltage
Control pin Voltage
Storage Temperature Range
Power Dissipation
Operating Condition
Vout
£
2.0V
2.1V
£
Vout
Internal Limited Tj=150°C
*
Operating Temperature Range
Operating Voltage Range
T
OP
=-40 ~ 85°C
T
OP
=-30 ~ 80°C
Short Circuit Current
Ishort
500
mA
*
P
D
must be decreased at rate of 4.8mW/°C(SOT23L-6), 7.2mW/°C(SOT89-5) for operation above 25°C.
The maximum ratings are the absolute limitation values with the possibility of the IC being damaged.
If the operation exceeds any of these standards, quality cannot be guaranteed.
GC3-H026H
Page 4
TK112xxCM/U
Electrical Characteristics
(1) C rank
The operation between -40 ~ 85°C is guaranteed by design. The parameter with limit value will be guaranteed
with test when manufacturing or SQC (Statistical Quality Control) technique.
Vin=Vout
TYP
+1V,Vcont=1.8V,Ta=25°C
Value
Parameter
Symbol
Conditions
Units
MIN
TYP
MAX
Output Voltage
Vout
V
Iout = 5mA
Refer to TABLE 1
Line Regulation
LinReg
-
0.0
6.0
mV
DVin
= 5V
Load Regulation
LoaReg
mV Iout = 5mA ~ 100mA
Refer to TABLE 1
mV Iout = 5mA ~ 200mA
Refer to TABLE 1
mV Iout = 5mA ~ 300mA
Refer to TABLE 1
Dropout Voltage
*1
Vdrop
-
105
170
mV Iout = 100mA
-
170
270
mV Iout = 200mA
-
235
370
mV Iout = 270mA
(2.1V
£
Vout
£
2.3V)
-
235
370
mV Iout = 300mA
(2.4V
£
Vout)
Maximum Output Current
*2
Iout
MAX
380
480
-
mA When (Vout
TYP
´0.9)
Supply Current
Iq
-
65
90
mA
Iout = 0mA
Standby Current
Istandby
-
0.0
0.1
mA
Vcont = 0V
Quiescent Current
Ignd
-
1.8
3.0
mA Iout = 100mA
Control Terminal
Control Current
Control Voltage
Icont
Vcont
-
1.8
-
1.6
-
5.0
-
-
-
-
10
-
0.35
-
0.6
mA
V
V
V
V
Vcont = 1.8V
Vout ON state
Vout OFF state
Vout ON state
Vout OFF state
T
OP
=-40~85°C
T
OP
=-30~80°C
*1:
For Vout
£
2.0V , no regulations.
*2:
The maximum output current is limited by power dissipation.
GC3-H026H
Page 5
