Page 1
TK112xx
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
■ Low Dropout Voltage
■ CMOS/TTL Compatible ON/OFF Switch
■ Very Low Standby Current 180 µA (ON, No Load)
■ Internal Thermal Shutdown
■ Short Circuit Protection
■ Very Low (0.1 µA) Current in OFF Mode
■ Low Noise with External Bypass Capacitor
DESCRIPTION
The TK112XX is a low power, linear regulator with a builtin electronic switch. The internal electronic 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 high logic
level. A pin for a bypass capacitor is provided, which
connects to the internal circuitry, to lower the overall output
noise level.
An internal PNP pass-transistor is used in order to achieve
low dropout voltage (typically 100 mV at 30 mA load
current). The device has very low quiescent current (180
µA) in the ON mode with no load and 1 mA with 30 mA load.
The quiescent current is typically 2.5 mA at 60 mA load.
When the device is in standby mode (V
quiescent current is typically 100 nA. An internal thermal
shutdown circuit limits the junction temperature to below
150 °C. The load current is internally monitored and the
device will shut down in the presence of a short circuit at the
output.
CONT
= 0), the
APPLICATIONS
■ Battery Powered Systems
■ Cellular Telephones
■ Pagers
■ Personal Communications Equipment
■ Portable Instrumentation
■ Portable Consumer Equipment
■ Radio Control Systems
■ Toys
■ Low Voltage Systems
TK112XXM
CONTROL
P50
BYPASS
BLOCK DIAGRAM
1
2 5
GND
3
64V
IN
GND
V
O
V
6
IN
CONTROL
1
ORDERING INFORMATION
TK112 M
Voltage Code
VOLTAGE CODE
27 = 2.75 V
30 = 3.0 V
32 = 3.25 V
35 = 3.5 V
January, 1996 TOKO, Inc. Page 1
40 = 4.0 V
45 = 4.5 V
47 = 4.75 V
50 = 5.0 V
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
Tape/Reel Code
1-3-96
S
S
S
S
S
BANDGAP
S S
TK112xx
REFERENCE
S
SS
THERMAL
PROTECTION
SS
S
S
–
S
+
S
S
+
–
NOISE
BYPASS
S
S
S
3
2,5
4
V
O
GND
Page 2
TK112xx
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 16 V
Output Current .................................................... 220 mA
Power Dissipation (Note 1) ................................ 400 mW
Storage Temperature Range ................... -55 to +150 °C
TK11227 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 3.8 V, unless otherwise specified.
A
Operating Temperature Range ...................-30 to +80 °C
Lead Soldering Temp. (10 sec.)............................ 240 °C
Junction Temperature ........................................... 150 °C
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 2.66 2.75 2.84 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 3.25 → 8.25 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.15 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 30 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C . Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
Page 2
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
January, 1996 TOKO, Inc.
Page 3
TK112xx
TK11230 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 4 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 2.90 3.00 3.10 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130.0 mA
Line Reg Line Regulation VIN = 3.5 → 8.5 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60.0 dB
IO = 10
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.15 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 30 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C . Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
January, 1996 TOKO, Inc. Page 3
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
Page 4
TK112xx
TK11232 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 4.3 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 3.15 3.25 3.35 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 3.75 → 8.75 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60.0 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.15 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 30 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C . Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
Page 4
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
January, 1996 TOKO, Inc.
Page 5
TK112xx
TK11235 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 4.5 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 3.39 3.5 3.61 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 4 → 9 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60.0 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.15 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 35 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C. Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
January, 1996 TOKO, Inc. Page 5
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
Page 6
TK112xx
TK11240 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 5 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 3.88 4.0 4.12 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 4.5 → 9.5 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.2 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 40 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C . Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
Page 6
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
January, 1996 TOKO, Inc.
Page 7
TK112xx
TK11245 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 5.5 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 4.37 4.5 4.63 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 5 → 10 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.25 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 45 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C . Maximum power dissipation = 400 mW
(When mounted as recommended), and 200 mW in free air.
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
January, 1996 TOKO, Inc. Page 7
Output Rise Time Off → On IO = 30 mA, V
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
Page 8
TK112xx
TK11247 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 5.7 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
170 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 4.61 4.75 4.89 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 5.25 → 10.25 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.4 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 45 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C. Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
Page 8
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
January, 1996 TOKO, Inc.
Page 9
TK112xx
TK11250 ELECTRICAL CHARACTERISTICS
Test conditions: T
SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
= 25 °C, VIN = 6 V, unless otherwise specified.
A
V
IN
I
IN
I
INS
V
O
V
DROP
I
O
I
OR
Supply Voltage Range 1.8 15 V
Supply Current IO = 0 mA, Except I
CONT
160 350 µA
Standby Current VIN = 8 V, Output off 0.1 µA
Output Voltage IO = 30 mA 4.85 5.0 515 V
Dropout Voltage IO = 60 mA 0.18 0.3 V
Output Current Note 3 150 170 mA
Recommended Output Current 130 mA
Line Reg Line Regulation VIN = 5.5 → 10.5 V 3.0 20 mV
Load Reg Load Regulation
IO = 5 mA → 60 mA 30 60 mV
IO = 5 mA → 100 mA 80 150 mV
RR Ripple Rejection 100 mV(rms), f = 400 Hz, 60 dB
IO = 10 mA
∆VO/∆T
Temperature Coefficient IO = 10 mA 0.4 mV/ °C
A
-25 °C ≤ TA ≤ + 75 °C
V
NO
Output Noise Voltage 10 Hz < f < 100 kHz, 50 µV(rms)
IO = 30 mA, Cp = 0.01 µF
V
REF
Noise Bypass Terminal Voltage 1.25 V
Control Terminal Specification
I
CONT
V
CONT
Control Current Output on, V
Control Voltage
Output on 2.4 V
= 2.4 V 14 40 µA
CONT
Output off 0.6 V
t
r
Note 1: Power dissipation must be derated at rate of 1.6 mW/°C for operation above 25 °C. Maximum power dissipation = 400 mW
Note 2: Output side capacitor should have low ESR at low temperatures if used below 0 °C.
Note 3: I
Note 4: This measurement (pulse measurement) is with a constant T
January, 1996 TOKO, Inc. Page 9
Output Rise Time Off → On IO = 30 mA, V
(When mounted as recommended), and 200 mW in free air.
(Output Current) is the measured current when the output voltage drops 0.3 V with respect to VO at IO = 30 mA.
O
1-3-96
= 0 → 2.4 V 0.3 ms
CONT
. The output change due to temperature change is not included.
J
Page 10
TK112xx
1
0
2
0
OUTPUT VOLTAGE vs.
LINE TRANSIENT RESPONSE
V
V
4
QUIESCENT CURRENT vs.
0
RIPPLE REJECTION
k
CONTROL TERMINAL CIRCUIT CURRENT vs.
TEST CIRCUIT
V
V
IN
CONT
+
_
+
_
A
+
1 µF
CONT
S
V
A
I
CONT
V
IN
1
V
456
23
SS
+
OUT
Noise Bypass
.01 µF
NOTE: CONNECT PINS 2 AND 5 TO
GND FOR MAXIMUM HEAT CONDUCTION.
S
10 µF
I
OUT
O
V
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C unless otherwise specified.
DROPOUT VOLTAGE vs.
0.5
0.4
(V)
0.3
DROP
V
0.2
0.1
0
05010
T = 25 °C
A
200
(pA)
100
CONT
I
LOAD CURRENT
IO (mA)
INPUT VOLTAGE
T = 25 °C
A
TK11250
TK112XX• TPC0
SHORT CIRCUIT CURRENT
T = 25 °C
A
5
4
3
(V)
O
V
2
1
0
0 100 20
0
-50
LEVEL (dB)
TK11250
TK11230
TK11220
IO (mA)
V
= V
IN
TK112XX • TPC0
T = 25 °C
CONTROL TERMINAL VOLTAGE
+ 1
O
A
(µA)
CONT
I
50
40
30
20
10
0
CC
O
TA= 25 °C
0
75 K
CONT = 0
R
1
150 K
300 K
V
O
23
V
(V)
CONT
DV = 1 V
10 mV/DIV
R
= 0
CONT
75 K
150 K
300 K
45
TK112XX • TPC03
TA = 25 °C
0
0
10
V (V)
CC
TK112XX • TPC0
Page 10
-100
2
100
1k 10k 100
HZ
1-3-96
TK112XX • TPC05
50 µs/DIV
TK112XX • TPC06
January, 1996 TOKO, Inc.
Page 11
TK112xx
LOAD TRANSIENT RESPONSE
I
V
SHUTDOWN CONTROL (OFF-ON)
S
V
NOISE LEVEL vs.
F
3
0
4
0
0
0
2
0
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C unless otherwise specified.
BYPASS CAPACITOR (pF)
IO = 60 mA
O
IO = 0 mA
O
50 µs/DIV
TA = 25 °C
TK12XX • TPC07
10 mV/DIV
TA = 25 °C
D
200
TK11250
O
C
=.001
P
=.01
C
P
C
=.1
P
50 µs/DIV
CL=3.3 µF
CL=10 µF
C
=.001
P
=.01
C
P
C
=.1
P
TK112XX • TPC08
150
TK11220
100
NOISE (µV)
50
0
1 pF 10 pF 100 pF .001µF .01 µF .1 µ
C
L = 3.3 µF
C
L = 10 µF
C
L = 3.3 µF
C
L = 10 µF
Cp
TA = 25 °C
IO = 60 mA
TK112XX • TPC09
QUIESCENT CURRENT vs.
TEMPERATURE
5
VIN = VO +1V
IO = 60 mA
500
400
300
DROPOUT VOLTAGE vs.
TEMPERATURE
50
40
30
CONTROL PIN CURRENT vs.
TEMPERATURE
V
CONT
= 5 V
2.5
20
V
= 2.4 V
10
CONTROL PIN CURRENT (µA)
0
–50
CONT
0
TA (°C)
50
10
TK112XX • TPC1
QUIESCENT CURRENT (mA)
IO = 30 mA
0
–50
0
CONTROL PIN VOLTAGE vs.
TEMPERATURE
2.0
TA (°C)
50
TK112XX • TPC1
DROP OUT VOLTAGE (mV)
10
200
100
200
0
–50
IO = 60 mA
TA (°C)
OUTPUT CURRENT vs.
TEMPERATURE
IO = 30 mA
50
TK112XX • TPC11
1000
180
160
1.0
CONTROL PIN VOLTAGE (V)
140
OUTPUT CURRENT (mA)
120
0
–50
0
TA (°C)
50
10
TK112XX • TPC1
–50
0
50
TA (°C)
10
TK112XX • TPC1
January, 1996 TOKO, Inc. Page 11
1-3-96
Page 12
TK112xx
OUTPUT VOLTAGE vs.
5
0
V
(V)
0
9
0
QUIESCENT CURRENT vs.
0
LOAD REGULATION
0
1
INPUT CURRENT (NO LOAD) vs.
0
7
0
OUTPUT VOLTAGE vs.
OUTPUT VOLTAGE vs.
0
TK11227
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C unless otherwise specified.
(V)
V
10
2.95
O
2.75
(mA)
Q
I
5
2.55
010
50
I
(mA)
O
227-
0
010
INPUT VOLTAGE
2
2.75
IO = 0 mA
30 mA
(mA)
IN
I
1
(V)
O
V
2.25
OUTPUT CURRENT
50
I
(mA)
O
227-2
INPUT VOLTAGE
60 mA
90 mA
INPUT VOLTAGE
2.85
2.75
2.65
(V)
O
V
2.55
2.45
2.35
02
10
V
(V)
IN
227-3
OUTPUT VOLTAGE vs.
2.80
TEMPERATURE
IO = 30 mA
2.75
O
60 mA
0
02
TK11230
OUTPUT CURRENT
3.2
(V)
O
3.0
V
2.8
05010
Page 12
10
V
(V)
IN
IO (mA)
227-4
TA = 25 °C
VIN = 3.1 V
TK112XX • TPC2
1.75
2.25 3.2
10
(mA)
Q
5
I
0
05010
2.75
VIN (V)
QUIESCENT CURRENT vs.
LOAD CURRENT
TA = 25 °C
VIN = 4.0 V
IO (mA)
1-3-96
TK112XX • TPC28
227-5
2.70
-50 10
0
TA(°C)
50
227-6
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
3.1
3.0
2.9
(V)
O
V
2.8
2.7
2.6
0102
VIN (V)
TA = 25 °C
IO = 0 mA
TK112XX• TPC2
January, 1996 TOKO, Inc.
Page 13
TK11230 (CONT.)
V
(V)
-5
INPUT CURRENT (NO LOAD) vs.
0
I
(mA)
0
1
.5
2
0
OUTPUT VOLTAGE vs.
0
3
QUIESCENT CURRENT vs.
0
-2
LOAD REGULATION
1
0
2
(µA)
1
IN
I
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
INPUT CURRENT vs.
INPUT VOLTAGE
TA = 25 °C
IO = 0 mA
TA = 25 °C unless otherwise specified.
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
3.0
IO = 0 mA
(V)
O
2.5
V
IO = 60 mA
IO = 90 mA
TA = 25 °C
IO = 30 mA
(V)
V
O
3.05
3.0
TK112xx
OUTPUT VOLTAGE vs.
TEMPERATURE
VIN = 4.0 V
IO = 30 mA
IO = 60 mA
0
0102
VIN (V)
TK112XX • TPC30
TK11232
3.45
3.25
(V)
O
V
3.0
0 100
2
50
IO (mA)
INPUT VOLTAGE
232-
2.0
2.5
3.0
V
(V)
IN
3
TK112XX • TPC3
2.95
–50
OUTPUT CURRENT
10
3.3
3.2
(mA)
Q
I
5
(V)
V
O
3.1
3.0
2.9
0
010
50
I
(mA)
O
232
02
OUTPUT VOLTAGE vs.
3.2
SUPPLY VOLTAGE
IO = 0 mA
3.30
0
TA (°C)
50
TK112XX • TPC3
INPUT VOLTAGE
10
V
(V)
IN
232-
OUTPUT VOLTAGE vs.
TEMPERATURE
8
IN
1
0
02
January, 1996 TOKO, Inc. Page 13
3.0
O
2.8
2.6
2.4
10
V
(V)
IN
232-4
60 mA
90 mA
30 mA
2.8 3.7
VIN (V)
1-3-96
3.2
232
IO = 30 mA
3.25
(V)
O
V
60 mA
3.20
-50 10
0
TA (°C)
50
232-6
Page 14
TK112xx
INPUT CURRENT (NO LOAD vs.
0
OUTPUT VOLTAGE vs.
.0
V
(V)
LOAD REGULATION
0
1
QUIESCENT CURRENT vs.
0
-2
OUTPUT VOLTAGE vs.
0
3
0
6
QUIESCENT CURRENT vs.
0
I
(mA)
LOAD REGULATION
0
1
OUTPUT VOLTAGE vs.
0
V
(V)
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TK11235
3.7
(V)
O
3.5
V
3.3
010
2
(mA)
1
IN
I
50
I
(mA)
O
SUPPLY VOLTAGE
TA = 25 °C unless otherwise specified.
10
5
Q
0
010
235-
3.5
30 mA
O
3.0
OUTPUT CURRENT
INPUT VOLTAGE
IO = 0 mA
50
I
(mA)
O
235-2
60 mA
90 mA
INPUT VOLTAGE
3.6
3.5
3.4
O
3.3
3.2
3.1
02
10
V
(V)
IN
235-3
OUTPUT VOLTAGE vs.
TEMPERATURE
IO = 30 mA
(V)
V
3.55
3.5
O
60 mA
0
02
TK11240
4.2
(V)
O
V
4.0
3.8
010
Page 14
2.5
10
V
(V)
IN
235-4
3.0 4
10
(mA)
Q
5
I
50
I
(mA)
O
240-
0
010
3.5
VIN (V)
235-5
OUTPUT CURRENT
50
I
(mA)
O
1-3-96
240
3.45
-50 10
0
TA (°C)
50
235-
INPUT VOLTAGE
4.1
4.0
(V)
3.9
O
V
3.8
3.7
3.6
02
10
V
(V)
IN
240-
January, 1996 TOKO, Inc.
Page 15
TK112xx
OUTPUT VOLTAGE vs.
0
3
QUIESCENT CURRENT vs.
0
-2
INPUT CURRENT (NO LOAD) vs.
0
OUTPUT VOLTAGE vs.
V
(V)
5
0
SUPPLY VOLTAGE vs.
SUPPLY VOLTAGE vs.
.5
V
(V)
5
0
6
LOAD REGULATION
1
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TK11240 (CONT.)
INPUT CURRENT (NO LOAD)
2
(mA)
CC
I
1
0
020
10
V
(V)
CC
240-4
TK11245
4.7
TA = 25 °C unless otherwise specified.
4.0
IO = 0 mA
30 mA
O
3.5
3.0
3.5 4
10
OUTPUT VOLTAGE
90 mA
4.0
VCC (V)
OUTPUT CURRENT
60 mA
240-
TEMPERATURE vs.
OUTPUT VOLTAGE
IO = 30 mA
(V)
O
V
4.05
4.0
60 mA
3.95
-50 10
0
50
TA(°C)
INPUT VOLTAGE
4.6
4.5
240-
4.5
(V)
O
V
4.3
0 100
IO (mA)
INPUT VOLTAGE
2
(mA)
IN
I
1
0
02
V
(V)
(mA)
Q
I
5
4.4
O
V
4.3
4.2
50
245-
0
010
50
I
(mA)
O
245
INPUT VOLTAGE
30 mA
IO = 0 mA
60 mA
90 mA
4.5
O
4.0
4.1
02
10
V
(V)
IN
245-
OUTPUT VOLTAGE vs.
4.55
TEMPERATURE
IO = 30 mA
4.5
(V)
O
V
60 mA
4.45
3.5
10
(V)
IN
245-4
4.0 5.0
4.5
VIN (V)
245-
-50 10
0
TA (°C)
50
245-6
January, 1996 TOKO, Inc. Page 15
1-3-96
Page 16
TK112xx
INPUT CURRENT (NO LOAD) vs.
0
OUTPUT VOLTAGE vs.
5
V
(V)
0
6
3
0
OUTPUT VOLTAGE vs.
0
QUIESCENT CURRENT vs.
0
2
OUTPUT VOLTAGEvs.
0
3
5
0
LOAD REGULATION
1
TK11247
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C unless otherwise specified.
4.95
4.75
(V)
O
V
4.55
0 100
50
IO (mA)
INPUT VOLTAGE
2
(mA)
IN
I
1
247-
OUTPUT CURRENT
10
4.85
4.75
(V)
(mA)
Q
I
5
4.65
O
V
4.55
4.45
0
010
50
I
(mA)
O
247-
INPUT VOLTAGE
4.35
02
4.80
4.75
IO = 0 mA
O
4.25
30 mA
60 mA
(V)
O
V
4.75
90 mA
SUPPLY VOLTAGE
10
V
(V)
IN
OUTPUT VOLTAGE vs .
TEMPERATURE
IO = 30 mA
60 mA
247-
4.70
0
02
10
V
(V)
IN
247-4
3.75
4.25 5.2
4.75
VIN (V)
247-5
-50 10
0
TA (°C)
50
247-
TK11250
OUTPUT CURRENT
TA = 25 °C
5.2
(V)
O
5.0
V
4.8
05010
IO (mA)
VIN = 6.0 V
TK112XX • TPC3
10
(mA)
Q
5
I
0
Page 16
QUIESCENT CURRENT vs.
LOAD CURRENT
TA = 25 °C
VIN = 6.0 V
05010
IO (mA)
1-3-96
TK112XX • TPC34
5.1
5.0
4.9
(V)
O
V
4.8
4.7
4.6
0102
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
TA = 25 ° C
I = 0 mA
O
VIN (V)
TK112XX• TPC3
January, 1996 TOKO, Inc.
Page 17
TK11250 (CONT.)
8
0
7
.5
6
0
TK112xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C unless otherwise specified.
INPUT CURRENT vs.
INPUT VOLTAGE
2
(µA)
1
IN
I
0
0102
VIN (V)
TA = 25 °C
IO = 0 mA
TK112XX • TPC3
(V)
V
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
5.0
IO = 0 mA
IO = 30 mA
IO = 60 mA
O
4.5
4.0
4.5
IO = 90 mA
5.0
VIN ( V)
TA = 25 °C
5
TK112XX • TPC3
(V)
V
O
5.05
5.0
4.95
–50
OUTPUT VOLTAGE vs.
TEMPERATURE
IO = 30 mA
IO = 60 mA
0
T ( C)°
A
50
VIN = 6.0 V
TK112XX • TPC3
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
LINE REGULATION (LINE REG)
Line regulation is the relationship between change in
output voltage due to a change in input voltage.
LOAD REGULATION (LOAD REG)
Load regulation is the relationship between change in
output voltage due to a change in load current.
DROP OUT VOLTAGE (V
DROP
)
This is a measure of how well the regulator performs as the
input voltage decreases. The smaller the number, the
further the input voltage can decrease before regulation
problems occur. Nominal output voltage is first measured
when VIN = VO + 1 at a chosen load current. When the
output voltage has dropped 100 mV from the nominal, V
- VO is the dropout voltage. This voltage is affected by load
current and junction temperature.
OUTPUT NOISE VOLTAGE
This is the effective AC voltage that occurs on the output
voltage under the condition where the input noise is low and
with a given load, filter capacitor, and frequency range.
THERMAL PROTECTION
This is an internal feature which turns the regulator off when
the junction temperature rises above 150 °C. After the
regulator turns off, the temperature drops and the regulator
January, 1996 TOKO, Inc. Page 17
output turns back on. Under certain conditions, the output
waveform may appear to be an oscillation as the output
turns off and on and back again in succession.
PACKAGE POWER DISSIPATION (PD)
This is the power dissipation level at which the thermal
sensor is activated. The IC contains an internal thermal
sensor which monitors the junction temperature. When the
junction temperature exceeds the monitor threshold of
150 °C, the IC is shutdown. The junction temperature rises
as the difference between the input power (VIN X IIN) and
the output power (VO X IO) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB, the board material, and the ambient
temperature. When the IC mounting has good thermal
conductivity, the junction temperature will be low even if the
power dissipation is great. When mounted onthe recom-
IN
mended mounting pad, the power dissipation of the SOT23L is increased to 400 mW. For operation at ambient
temperatures over 25 °C, the power dissipation of the SOT23L device should be derated at 3.2 mW/°C. To determine
the power dissipation for shutdown when mounted, attach
the device on the actual PCB and deliberately increase the
output current (or raise the input voltage) until the thermal
protection circuit is activated. Calculate the power dissipation of the device by subtracting the output power from the
input power. These measurements should allow for the
ambient temperature of the PCB. The value obtained from
PD/(150 °C - TA) is the derating factor. The PCB mounting
pad should provide maximum thermal conductivity in order
to maintain low device temperatures. As a general rule, the
1-3-96
8
Page 18
TK112xx
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
lower the temperature, the better the reliability of the
device. The Thermal resistance when mounted is expressed as follows:
TJ = 0JA X PD + T
For Toko ICs, the internal limit for junction temperature is
150 °C. If the ambient temperature, TA is 25 °C, then:
150 °C = 0JA X PD + 25 °C
0JA X PD = 125 °C
0JA = 125 °C/ P
PD is the value when the thermal sensor is activated. A
simple way to determine PD is to calculate VIN X IIN when
the output side is shorted. Input current gradually falls as
temperature rises. You should use the value when thermal
equilibrium is reached.
The range of currents usable can also be found from the
graph below.
(mW)
P
D
D
pd
25 50 75 150
Procedure:
1.) Find P
D
2.) PD1 is taken to be PD X (≈0.8 ~ 0.9)
3.) Plot PD1 against 25 °C
4.) Connect P
D1
150 °C with a straight line.
5.) In design, take a vertical line from the maximum
operating temperature (e.g. 75 °C) to the derating
curve.
6.) Read off the value of PD against the point at which
the vertical line intersects the derating curve. This
is taken as the maximum power dissipation, DPD.
The maximum operating current is IO X (DPD/(V
VO).
A
D
3
6
4
5
T (°C)
to the point corresponding to the
IN(MAX)
INPUT/OUTPUT DECOUPLING CAPACITOR CONSIDERATIONS
Voltage regulators require input and output decoupling
capacitors. The required value of these capacitors vary
with application. Capacitors made by different manufacturers can have different characteristics, particularly with
regard to high frequencies and equivalent resistance (ESR)
over temperature. The type of capacitor is also important.
For example, a 5.6 µF aluminum electrolytic may be required for a certain application. If a tantalum capacitor is
used, a lower value of 3.3 µF would be adequate. It is
important to consider the temperature characteristics of the
decoupling capacitors. While Toko regulators are designed to operate as low as -30 °C, many capacitors will not
operate properly at this temperature. The capacitance of
aluminum electrolytic capacitors may decrease to 0 at low
temperatures. This may cause oscillation on the output of
the regulator since some capacitance is required to guarantee stability. Thus, it is important to consider the characteristics of the capacitor over temperature when selection
decoupling capacitors. The ESR is another important
parameter. The ESR will increase with temperature but low
ESR capacitors are often larger and more costly. In
general, Tantalum capacitors offer lower ESR than aluminum electrolytic, but new low ESR aluminum electrolytic
capacitors are now available from several manufacturers.
Usually a bench test is sufficient to determine the minimum
capacitance required for a particular application. After
taking thermal characteristics and tolerance into account,
the minimum capacitance value should be approximately
two times this value. The recommended minimum capacitance for the TK112xx is 3.3 µF. Please note that linear
regulators with a low dropout voltage have high internal
loop gains which requires care in guarding against oscillation caused by insufficient decoupling capacitance. The
use of high quality decoupling capacitors suited for your
application will guarantee proper operation of the circuit.
NOISE BYPASS CAPACITOR SECTION
The noise bypass capacitor (CP) should be connected as
close as possible to pin 3 and ground. The recommended
value for CP is 0.01 µF. The noise bypass terminal has a
-
high impedance and care should be taken if the noise
bypass capacitor is not used. This terminal is susceptible
to external noise and oscillation can occur when CP is not
used and the solder pad for this pin is made too large.
Page 18
1-3-96
January, 1996 TOKO, Inc.
Page 19
APPLICATION INFORMATION
1.) Disabling the control pin
Connect control terminal to VIN through a resistor (R).
Higher resistance values are good for reducing quiescent
current but this can cause the regulator to shut down at
lower input voltages. See Figure A.
10 µF
V
O
V
IN
+
1 µF R
0 Ω ≤ R ≤ 300 kΩ
654
+
123
CP = 10 nF
TK112xx
4.) Parallel connection for ON/OFF control
V
0.1 µF
0.1 µF
On/Off
V
IN
IN
11250
Cont
V
IN
11230
+
Cont
R
S
V
IN
11220
+
Cont
V
O
GND
V
O
GND
V
O
GND
+
+
+
5 V
3 V
2 V
Figure A
2.) Using the control function
Turn on the regulator by setting the control pin voltage to
2.4 V or higher. Turn off the regulator by pulling the control
pin below 0.6 V. The regulator can also be controlled
directly from a TTL or CMOS device. See Figure B.
10 µF
V
O
V
IN
6
54
+
1
µF
13
2
R
+
CP = 10 nF
Figure B
3.) Microprocessor/Logic Control
V
GND
O
+
Microprocessor
V
IN
112XX
Cont
+
To reduce IC power dissipation, connect a resistor, RS, in
series with V
for the lower output voltage devices. This
IN
will prevent thermal shutdown due to excessive power
dissipation.
5.) Constant current load
112XX
V
GND
O
R
+
+
ON/OFF
V
IN
+
Cont
When there is a large ouput current, the quiescent current
also increases, and the difference becomes larger. When
using the ON/OFF control, the terminal voltage should be
set 2.4 V higher than the GND terminal of the IC. When the
ON/OFF control is not being used, connect it to VIN.
The Input and Control current in the off mode are less than
200 pA.
January, 1996 TOKO, Inc. Page 19
1-3-96
Page 20
TK112xx
APPLICATION INFORMATION (CONT.)
6.) Heat dissipation
Make the copper pattern as large as possible to provide
good heat dissipation (pin 5 is the heatsink).
Maximum power dissipation = 400 mW (When mounted as
recommended) See Figure C.
+
GND
+
Figure C
7.) Handling molded resin packages
All plastic molded packages absorb some moisture from
the air. If moisture absorption occurs prior to soldering the
devise into the printed circuit board, increased separation
of the lead from the plastic molding may occur, degrading
the moisture barrier characteristics of the device. This
property of plastic molding compounds should not be
overlooked, particularly in the case of very small packages,
where the plastic is very thin. In order to preserve the
original moisture barrier properties of the package, devices
are stored and shipped in moisture proof bags, filled with
dry air. The bags should not be opened or damaged prior
to the actual use of the devices. If this is unavoidable, the
devices should be stored in a low relative humidity environment (40 to 65%) or in an enclosed environment with
desiccant.
Page 20
1-3-96
January, 1996 TOKO, Inc.
Page 21
TK112xx
PACKAGE OUTLINE
SOT23L
456
0.6
Marking Information
1.0
11227 P2
11230 P3
Orientation Mark
1 2 3
e
(Pin 2 and pin 5 should be
0.95
Marking
Information
+0.1
-0.05
0.4
e
0.95
0.2
±
3.4
M
0.1
0.2
+0.15
- 0
±
1.2
1.25
0.05
±
0.05
e
e
0.95
0.95
Recommended Mount Pad
0.3
+0.1
-0.05
0.15
3.3
3.2
1
e
0.2
±
2.2
±0.15
0.4
0.3
±
30° Max
11232 P
11235 P
11240 P4
11245 P
11247 P4
11250 P5
grounded for heat dissipation)
Unit:mm
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO
does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted
by implication or otherwise under any patent or patent rights of TOKO, Inc.
3
3
4
YOUR LOCAL REPRESENTATIVE IS:
TOKO America, Inc.
1250 Feehanville Dr.
Mt. Prospect, ILL 60056
Tel: 1(800) PIK-TOKO
Fax: 1(847) 699-1194
January, 1996 TOKO, Inc. Page 21
© 1993 Toko America, Inc.
All Rights Reserved
1-3-96
IC-114-TK112
Printed in U.S.A.
Loading...