TK701xx
1.0 V LOW DROPOUT LINEAR REGULATOR
FEATURES
s
Low Input Voltage Operation (Single Battery Cell)
s
Internal PNP Transistor
s
s
s
s
Built-In Shutdown Control (Off Current, 10
µ
A Typ)
Low Dropout Voltage (30 mV Typ)
High Speed ON/OFF Transient, (15
µ
s Typ)
Very Small Surface Mount Package (SOT-25)
APPLICATIONS
s
Pagers
s
Personal Communication Equipment
s
Portable Consumer Equipment
s
Radio Control Systems
s
Single Battery Cell Systems
DESCRIPTION
The TK701xx is a very low dropout, low input voltage
operation regulator suitable for single battery cell applica-
tions. This regulator provides 1.0 V output with a dropout
voltage of only 30 mV. The active low control provides on/
off switching of the output. In the off mode, the standby
supply current is 10
µA,
thus extending battery life.
The TK701xx is available in a very small plastic surface
mount package (SOT-25).
TK701xx
SHUT DOWN 1
GND 2
GND 3
6
VIN
4
VO
BLOCK DIAGRAM
VIN
6
4
VO
ORDERING INFORMATION
TK701
M
Tape/Reel Code
Voltage Code
SHUT DOWN
+
SHUT
DOWN
1
-
VOLTAGE CODE
10 = 1.0 V
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
BANDGAP
REFERENCE
2,3
GND
TK70110 BD
January, 1996 TOKO, Inc.
1-16-96
Page 1
TK701xx
ABSOLUTE MAXIMUM RATINGS
Input Voltage .............................................................. 6 V
Power Dissipation .............................................. 150 mW
Operating Voltage Range .............................. 0.9 to 5.0 V
Junction Temperature .......................................... 150
°C
Storage Temperature Range ................... -50 to +150
°C
Operating Temperature Range ..................... 0 to +80
°C
Lead Soldering Temp. (10 sec.) ......................... 240
°C
Tk70110 ELECTRICAL CHARACTERISTICS
Test Conditions: V
IN
= 1.2 V, T
A
= 25
°C
, unless otherwise specified.
SYMBOL
I
IN
I
STBY
V
O
V
DROP
I
O
Line Reg
Load Reg
RR
∆V
O
/∆T
A
PARAMETER
Supply Current
Standby Current
Output Voltage
Dropout Voltage
Output Current
Line Regulation
Load Regulation
Ripple Rejection
Output Voltage
Temperature Dependency
V
O
+ 1.2 V
≤
V
IN
≤
2.2 V
I
O
= 0
→
2 mA
I
O
= 0
→
10 mA
C
L
= 3.3
µF,
400 Hz
0
≤
T
A
≤
60
°C
2
5
36
0.05
I
O
= 2 mA
20
50
10
25
TEST CONDITIONS
I
O
= 0 mA, V
IN
= 1.2 V
V
IN
= 1.2 V, Output off
0.95
MIN
TYP
190
10
1.0
30
1.05
MAX
UNITS
µA
µA
V
mV
mA
mV
mV
mV
dB
dB
Control Terminal Specification
I
CONT
V
CONT
Control Current
Control Voltage
V
CONT
=1.0 V, R
C
= 0, Note 2
Output On
Output Off
Note 1:
Note 2:
22
-.05
1.0
50
0.4
µA
V
V
Must be used within the power dissipation curve. Power dissipation is 350 mW when mounted as
recommended.
Control current may be decreased by connecting a series resistor to control pin.
Page 2
1-16-96
January, 1996 TOKO, Inc.
TK701xx
TEST CIRCUIT
IIN
A
VIN
5
4
VO
IN
T K70110
OUT
VIN
+
+
CL
IO
V
VO
0.1 µ F
VSD
SHUT
DOWN
1
2
3
GND
Rc
C
L
= 2.2 µ F
TYPICAL PERFORMANCE CHARACTERISTICS
OUTPUT VOLTAGE vs.
OUTPUT CURRENT
1.05
TA = 25 °C
SHORT CIRCUIT CURRENT
1.0
0.8
VIN = 1.2 V
100
ON/OFF CONTROL TERMINAL
(SERIES RESISTOR RC)
VO
RC = 30 k
TA = 25 °C
RC = 0
RC = 10 k
RC = 20 k
ICONT (µ A)
TA = 25 °C
VO (V)
VO (V)
RC = 10 k
RC = 20 k
50 R = 0
C
0.6
0.4
0.2
VIN = 1.1 V
VIN = 1.0 V
0
50
IO (mA)
100
12
1.0
0.95
0
10
IO (mA)
20
1
0
0
0
1.0
VCONT (V)
RC = 30 k
2.0
13
QUIESCENT CURRENT vs.
INPUT VOLTAGE
-50
50
TA = 25 °C
NOISE SPECTRUM
IO = 3 mA
TA = 25 °C
CL = 1 µ F
10 µ F (SPECTRUM ANALYZER ONLY)
0
RIPPLE REJECTION
TA = 25 °C
-100
Ripple Rejection (dB)
IQ(OFF) (µ A)
NOISE (dB)
25
-50
0
1.0
VIN (V)
2.0
14
0
500 kHz
FREQUENCY
1 MHz
15
-100
.1
1
10
100
7
Frequency (kHz )
January, 1996 TOKO, Inc.
1-16-96
Page 3
TK701xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
LINE TRANSIENT RESPONSE
6.0
1.6
VIN
1.2
TA = 25 °C
CL = 1 µ F
0
1.05
VO
1.01
TA = 25 °C
1.05
VO
1.01
50 µ s/DIV
50 µ s/DIV
VO
CL = 3.3 µ F
IO
SD
LOAD TRANSIENT RESPONSE
OUTPUT (ON/OFF)
CONTROL RESPONSE
TA = 25 °C
8
9
10 µ s/DIV
10
TK70110
OUTPUT VOLTAGE vs.
OUTPUT CURRENT
1.05
1.0
QUIESCENT CURRENT vs.
OUTPUT CURRENT
TA = 25 °C
1.2
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
TA = 25 °C
IO (mA)
VO (V)
VO (V)
0.5
1.0
1.0
0.95
0
10
IO (mA)
20
16
0
0
10
IO (mA)
20
2
0.7
0.8
1.0
VIN (V)
3
1.5
1.8
INPUT CURRENT (NO LOAD) vs.
INPUT VOLTAGE
500
TA = 25 °C
1.1
OUTPUT VOLTAGE vs.
SUPPLY VOLTAGE
TA = 25 °C
+25
OUTPUT VOLTAGE DRIFT vs.
TEMPERATURE
TA = 25 °C
IIN (µ A)
VO (mV)
VO (V)
0
.96
IO = 5.0 mA
IO = 2.5 mA
0
0
1
2
3
VIN (V)
4
5
4
0.91
0.8
0.9
IO = 0 mA
1.0
1.1
VIN (V)
1.2
1.3
5
-30
-50
0
50
TEMPERATURE (°C)
100
6
Page 4
1-16-96
January, 1996 TOKO, Inc.
TK701xx
APPLICATION NOTES
RECOMMENDED MOUNTING
Optimum performance can only be achieved when the IC
is mounted on a PC board according to the diagram below.
This is because of the extremely small package and limited
power dissipation. Shape the metal portion of the PCB as
shown in the following drawing.
V
IN
V
O
GND
GND
ON/OFF or C
P
Use a large bypass capacitor and connect it in a place near
GND of the IC. Pay attention to temperature characteristics
of the capacitor, especially the increase of ESR and de-
crease of capacitance in low temperatures. Oscillation,
reduction of ripple rejection and increased noise may occur
in some cases if the proper capacitor is not used. An output
capacitor more than 1.0
µF
is required to maintain stability.
The standard test condition is 3.3
µF
(T
A
= 25
°C).
DROPOUT VOLTAGE
Dropout voltage is the voltage difference between the input
voltage and the output voltage where the output voltage
decreases to 100 mV below the nominal output voltage as
the input voltage is decreased.
To measure dropout voltage, set the input voltage to the
nominal output voltage +1 V and measure the output
voltage. Reduce the input voltage to the point where the
output is 100 mV below the previously measured value.
The dropout voltage is the difference between the input and
output voltage at this point. This voltage depends on the
load current and ambient temperature.
January, 1996 TOKO, Inc.
1-16-96
Page 5
