TOKO TK11225BUIL

TK112xxB
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
APPLICATIONS
High Voltage Precision at ± 2.0%
Active High On/Off Control
Very Low Dropout Voltage 80 mV at 30 mA
Very Low Noise
Very Small SOT-23L or SOT-89 Surface Mount
Packages
■ Internal Thermal Shutdown
■ Short Circuit Protection
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Battery Powered Systems
Cellular Telephones
Pagers
Personal Communications Equipment
Portable Instrumentation
Portable Consumer Equipment
Radio Control Systems
Toys
Low Voltage Systems
DESCRIPTION
The TK112xxB is a low dropout linear regulator with a builtin 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 80 mV (typ.) at 30 mA load current. The
TK112xxB has a very low quiescent current of 170 µA at
no load and 1 mA with a 30 mA load. The standby current
is typically 100 nA. The internal thermal shut down circuitry
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 or overcurrent
condition at the output.
The TK112xxB is available in either a 6-pin SOT-23L or a
5-pin SOT-89 surface mount package.
TK112xxB
CONTROL
20 P
NOISE BYPASS
SOT-23L
NOISE BYPASS
GND
SOT-89
ORDERING INFORMATION
TK112
GND
CONTROL
GND
VOUT
VOUT
GND
VIN
B
BLOCK DIAGRAM
Tape/Reel Code
Voltage Code
Temp. Code
Package Code
VIN
VOLTAGE CODE
PACKAGE CODE:
13 = 1.3 V
14 = 1.4 V
15 = 1.5 V
16 = 1.6 V
17 = 1.7 V
18 = 1.8 V
19 = 1.9 V
20 = 2.0 V
21 = 2.1 V
22 = 2.2 V
23 = 2.3 V
24 = 2.4 V
25 = 2.5 V
26 = 2.6 V
27 = 2.7 V
28 = 2.8 V
29 = 2.9 V
30 = 3.0 V
31 = 3.1 V
32 = 3.2 V
M: SOT-23L
U: SOT-89
33 = 3.3 V
34 = 3.4 V
35 = 3.5 V
36 = 3.6 V
37 = 3.7 V
38 = 3.8 V
39 = 3.9 V
40 = 4.0 V
41 = 4.1 V
42 = 4.2 V
43 = 4.3 V
44 = 4.4 V
45 = 4.5 V
46 = 4.6 V
47 = 4.7 V
48 = 4.8 V
49 = 4.9 V
50 = 5.0 V
55 = 5.5 V
80 = 8.0 V
VIN
NOTE 1:
1.3 V to 1.9 V available
in SOT-23L package only.
VOUT
TAPE/REEL CODE
L: Tape Left (SOT-23L)
B: Tape Left (SOT-89)
THERMAL
PROTECTION
TEMP. CODE:
C: -30 to +80 C
I: -40 to +85 C
CONTROL
NOTE 2:
1.3 V to 2.4 V available
in C temperature code
(-30 to +80 C) only.
October 1999 TOKO, Inc.
BANDGAP
REFERENCE
GND
NOISE
BYPASS
Page 1
TK112xxB
ABSOLUTE MAXIMUM RATINGS TK112xxBC (VOUT ≥ 2.0 V)
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note1) .................. 600 mW
Power Dissipation SOT-89 (Note1) .................... 900 mW
Reverse Bias ............................................................ 10 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
TK112xxBC ELECTRICAL CHARACTERISTICS (VOUT ≥ 2.0 V)
Test conditions: TA = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
IQ
Quiescent Current
IOUT = 0 mA, Excluding ICONT
ISTBY
Standby Current
VIN = 8 V, Output OFF
VOUT
Output Voltage
IOUT = 30 mA
Line Reg
Line Regulation
Load Reg Load Regulation
MIN
TYP
MAX
UNITS
170
250
µA
0.1
µA
See Table 1
V
VOUT ≤ 5.5 V, (Note 2)
3.0
20
mV
VOUT ≥ 5.6 V, (Note 2)
15
40
mV
IOUT = 1 to 60 mA, (Note 2)
6
30
mV
IOUT = 1 to 100 mA, (Note 2)
18
60
mV
IOUT = 1 to 150 mA, (Note 2)
23
90
mV
IOUT = 60 mA, (Note 2)
0.12
0.20
V
IOUT = 150 mA, (Note 2)
0.26
0.39
V
VDROP
Dropout Voltage
IOUT
Continuous Output Current
(Note 2)
150
mA
IOUT(PULSE)
Pulse Output Current
5 ms pulse, 12.5 % duty cycle
180
mA
RR
Ripple Rejection
f = 400 Hz, CL = 10 µF, CN = 0.1 µF,
VIN = VOUT + 1.5 V, IOUT = 30 mA,
VRIPPLE = 100 mVrms, (Note 3)
60
dB
VNO
Output Noise Voltage
10 Hz ≤ f ≤ 80 kHz, CL = 10 µF,
CN = 0.1 µF, VCN = VOUT + 1.5 V,
IOUT = 60 mA, (Notes 3,4)
30
µVrms
Vref
Noise Bypass Terminal
Voltage
1.25
V
∆VOUT /∆T
Temperature Coefficient
40
ppm/° C
IOUT = 10 mA
CONTROL TERMINAL SPECIFICATIONS
ICONT
Control Current
VCONT = 1.8 V, Output ON
VCONT(ON)
Control Voltage ON
Output ON
VCONT(OFF)
Control Voltage OFF
Output OFF
12
35
1.8
µA
V
0.6
V
Note 1: When mounted as recommended. Derate at 4.8 mW/°C for SOT-23L and 6.4 mW/°C for SOT-89 packages for operation above 25°C.
Note 2: Refer to “Definition of Terms.”
Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal.
Gen. Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.
Page 2
October 1999 TOKO, Inc.
TK112xxB
ABSOLUTE MAXIMUM RATINGS TK1121xBC (VOUT ≤ 1.9 V)
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note1) .................. 600 mW
Power Dissipation SOT-89 (Note1) .................... 900 mW
Reverse Bias .............................................................. 7 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
TK1121xBC ELECTRICAL CHARACTERISTICS (VOUT ≤ 1.9 V)
Test conditions: TA = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
IQ
Quiescent Current
IOUT = 0 mA, Excluding ICONT
ISTBY
Standby Current
VIN = 8 V, Output OFF
VOUT
Output Voltage
IOUT = 30 mA
Line Reg
Line Regulation
(Note 2)
Load Reg Load Regulation
MIN
TYP
MAX
UNITS
170
250
µA
0.1
µA
See Table 2
V
3.0
20
mV
IOUT = 1 to 60 mA, (Note 2)
6
30
mV
IOUT = 1 to 100 mA, (Note 2)
18
60
mV
130
mA
VIN ≥ 2.6 V, (Note 2)
150
mA
180
mA
2.4 V ≤ VIN ≤ 2.6 V, (Note 2)
IOUT
Continuous Output Current
IOUT(PULSE)
Pulse Output Current
5 ms pulse, VIN ≥ 2.6 V,
12.5 % duty cycle
RR
Ripple Rejection
f = 400 Hz, CL = 10 µF, CN = 0.1 µF,
VIN = VOUT + 1.5 V, IOUT = 30 mA,
VRIPPLE = 100 mVrms, (Note 3)
55
dB
VNO
Output Noise Voltage
10 Hz ≤ f ≤ 80 kHz, CL = 10 µF,
CN = 0.1 µF, VCN = VOUT + 1.5 V,
IOUT = 60 mA, (Notes 3,4)
30
µVrms
Vref
Noise Bypass Terminal
Voltage
1.25
V
∆VOUT /∆T
Temperature Coefficient
40
ppm/° C
IOUT = 10 mA
CONTROL TERMINAL SPECIFICATIONS
ICONT
Control Current
VCONT = 1.8 V, Output ON
VCONT(ON)
Control Voltage ON
Output ON
VCONT(OFF)
Control Voltage OFF
Output OFF
12
35
1.8
µA
V
0.6
V
Note 1: When mounted as recommended. Derate at 4.8 mw/°C for SOT-23L and 6.4 mw/°C for SOT-89 packages for operation above 25 °C.
Note 2: Refer to “Definition of Terms.”
Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal.
Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.
October 1999 TOKO, Inc.
Page 3
TK112xxB
ABSOLUTE MAXIMUM RATINGS TK112xxBI (VOUT ≥ 2.5 V)
Supply Voltage ......................................................... 16 V
Power Dissipation SOT-23L (Note1) .................. 600 mW
Power Dissipation SOT-89 (Note1) .................... 900 mW
Reverse Bias ............................................................ 10 V
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-40 to +85 °C
Operating Voltage Range ............................ 1.8 to 14.5 V
Junction Temperature ........................................... 150 °C
TK112xxBI ELECTRICAL CHARACTERISTICS (VOUT ≥ 2.5 V)
Test conditions: TA = -40 to 85 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
IQ
Quiescent Current
IOUT = 0 mA, Excluding ICONT
ISTBY
Standby Current
VIN = 8 V, Output OFF
VOUT
Output Voltage
IOUT = 30 mA
Line Reg
Line Regulation
Load Reg Load Regulation
MIN
TYP
MAX
UNITS
170
300
µA
0.2
µA
See Table 3
V
VOUT ≤ 5.5 V,(Note 2)
3.0
25
mV
VOUT
15
40
mV
IOUT = 1 to 60 mA, (Note 2)
6
40
mV
IOUT = 1 to 100 mA, (Note 2)
18
80
mV
IOUT = 1 to 150 mA, (Note 2)
23
110
mV
IOUT = 60 mA, (Note 2)
0.12
0.23
V
IOUT = 150 mA, (Note 2)
0.26
0.40
V
5.6 V,(Note 2)
VDROP
Dropout Voltage
IOUT
Continuous Output Current
(Note 2)
150
mA
IOUT(PULSE)
Pulse Output Current
5 ms pulse, 12.5 % duty cycle
180
mA
RR
Ripple Rejection
f = 400 Hz, CL = 10 µF, CN = 0.1 µF,
VIN = VOUT + 1.5 V, IOUT = 30 mA,
VRIPPLE = 100 mVrms, (Note 3)
60
dB
VNO
Output Noise Voltage
10 Hz ≤ f ≤ 80 kHz, CL = 10 µF,
CN = 0.1 µF, VCN = VOUT + 1.5 V,
IOUT = 60 mA, (Notes 3,4)
30
µVrms
Vref
Noise Bypass Terminal
Voltage
1.25
V
∆VOUT /∆T
Temperature Coefficient
40
ppm/° C
IOUT = 10 mA
CONTROL TERMINAL SPECIFICATIONS
ICONT
Control Current
VCONT = 1.8 V, Output ON
VCONT(ON)
Control Voltage ON
Output ON
VCONT(OFF)
Control Voltage OFF
Output OFF
12
40
2.0
µA
V
0.5
V
Note 1: When mounted as recommended. Derate at 4.8 mw/°C for SOT-23L and 6.4 mw/°C for SOT-89 packages for operation above 25 °C.
Note 2: Refer to “Definition of Terms.”
Note 3: Ripple rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 4: Output noise voltage can be reduced by connecting a capacitor to a noise pass terminal.
Gen Note: Parameters with min. or max. values are 100% tested at TA = 25 °C.
Gen Note: For Line Regulation, typ. and max. is changed to VOUT > 5.6 V.
Page 4
October 1999 TOKO, Inc.
TK112xxB
TK112xxBMC ELECTRICAL CHARACTERISTICS TABLE 1
Test conditions: TA = 25 °C, IOUT = 30 mA, unless otherwise specified.
Output
Voltage
1.3 V
1.4 V
1.5 V
1.6 V
1.7 V
1.8 V
1.9 V
Voltage
Code
13
14
15
16
17
18
19
VOUT(MIN)
VOUT(MAX)
1.240 V
1.340 V
1.440 V
1.540 V
1.640 V
1.740 V
1.804 V
1.36 V
1.46 V
1.560 V
1.660 V
1.760 V
1.860 V
1.960 V
Test
Voltage
2.4 V
2.4 V
2.4 V
2.4 V
2.4 V
2.4 V
2.4 V
TK112xxBC ELECTRICAL CHARACTERISTICS TABLE 2
Test conditions: TA = 25 °C, IOUT = 30 mA, unless otherwise specified.
Output
Voltage
2.0 V
2.1 V
2.2 V
2.3 V
2.4 V
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
Voltage
Code
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
VOUT(MIN)
VOUT(MAX)
1.940 V
2.040 V
2.140 V
2.240 V
2.340 V
2.440 V
2.540 V
2.640 V
2.740 V
2.840 V
2.940 V
3.040 V
3.140 V
3.240 V
3.335 V
3.435 V
3.535 V
2.060 V
2.160 V
2.260 V
2.360 V
2.460 V
2.560 V
2.660 V
2.760 V
2.860 V
2.960 V
3.060 V
3.160 V
3.260 V
3.360 V
3.465 V
3.565 V
3.665 V
October 1999 TOKO, Inc.
Test
Voltage
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
Output
Voltage
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.5 V
8.0 V
Voltage
Code
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
80
VOUT(MIN)
VOUT(MAX)
3.630 V
3.725 V
3.825 V
3.920 V
4.020 V
4.120 V
4.215 V
4.315 V
4.410 V
4.510 V
4.605 V
4.705 V
4.800 V
4.900 V
5.390 V
7.840 V
3.770 V
3.875 V
3.975 V
4.080 V
4.180 V
4.280 V
4.385 V
4.485 V
4.590 V
4.690 V
4.795 V
4.895 V
5.000 V
5.100 V
5.610 V
8.160 V
Test
Voltage
4.7 V
4.8 V
4.9 V
5.0 V
5.1 V
5.2 V
5.3 V
5.4 V
5.5 V
5.6 V
5.7 V
5.8 V
5.9 V
6.0 V
6.5 V
9.0 V
Page 5
TK112xxB
TK112xxBI ELECTRICAL CHARACTERISTICS TABLE 3
Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 30 mA, unless otherwise specified.
Output
Voltage
Voltage
Code
2.5 V
2.6 V
2.7 V
2.8 V
2.9 V
3.0 V
3.1 V
3.2 V
3.3 V
3.4 V
3.5 V
3.6 V
3.7 V
3.8 V
3.9 V
4.0 V
4.1 V
4.2 V
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.5 V
8.0 V
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
80
Page 6
Room Temp. Range (TA = 25 °C)
VOUT(MAX)
VOUT(MIN)
2.440 V
2.540 V
2.640 V
2.750 V
2.840 V
2.940 V
3.040 V
3.140 V
3.240 V
3.335 V
3.435 V
3.535 V
3.630 V
3.725 V
3.825 V
3.920 V
4.020 V
4.120 V
4.215 V
4.315 V
4.410 V
4.510 V
4.605 V
4.705 V
4.800 V
4.900 V
5.390 V
7.840 V
2.560 V
2.660 V
2.760 V
2.860 V
2.960 V
3.060 V
3.160 V
3.260 V
3.360 V
3.465 V
3.565 V
3.665 V
3.770 V
3.875 V
3.975 V
4.080 V
4.180 V
4.280 V
4.385 V
4.485 V
4.590 V
4.690 V
4.795 V
4.895 V
5.000 V
5.100 V
5.610 V
8.160 V
Full Temp. Range (TA = -40 to +85 °C)
VOUT(MIN)
VOUT(MAX)
2.400 V
2.500 V
2.600 V
2.700 V
2.800 V
2.900 V
3.000 V
3.095 V
3.190 V
3.290 V
3.385 V
3.485 V
3.580 V
3.675 V
3.770 V
3.870 V
3.965 V
4.060 V
4.160 V
4.255 V
4.350 V
4.450 V
4.545 V
4.640 V
4.740 V
4.835 V
5.320 V
7.745 V
2.600 V
2.700 V
2.800 V
2.900 V
3.000 V
3.100 V
3.200 V
3.305 V
3.410 V
3.510 V
3.615 V
3.720 V
3.820 V
3.925 V
4.030 V
4.130 V
4.235 V
4.335 V
4.440 V
4.545 V
4.645 V
4.750 V
4.850 V
4.955 V
5.060 V
5.165 V
5.680 V
8.265 V
October 1999 TOKO, Inc.
TK112xxB
TEST CIRCUITS
SOT-23L
SOT-89
IIN
IIN
VIN
VIN
+
+
VOUT
IOUT
+
VIN
+
112XXB
VIN
CONT
CN
0.1 µF
VIN
+
1.0 µF
NOISE
BYPASS
TRANSIENT RESPONSE
CN
0.1 µF
ICONT
VOUT
2.2 µF
NOISE
BYPASS
CONT
+
VOUT
VOUT
2.2 µF
1 µF
VCONT
IOUT
+
ICONT
V OUT
VCONT 1
RS
CN
0.1 µF
CONT
1 µF
CL = 10 µF to 0.22 µF
Note: Connect pin 5 to
ground for heat sink
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, unless otherwise specified.
OUTPUT VOLTAGE RESPONSE
(OFF→ON)
SHORT CIRCUIT CURRENT
LOAD REGULATION
CL = 2.2 µF
4
VOUT (V)
VOUT (5 mV/DIV)
CN = 0.01 µF
VCONT
5
VOUT(TYP)
VOUT
CN = 0.1 µF
2
1
ILOAD = 30 mA
0
200
400
600
800
0
50
0
150
300
TIME (µs)
IOUT (mA)
OUTPUT VOLTAGE VS. INPUT
VOLTAGE
LINE REGULATION
DROPOUT VOLTAGE VS.
OUTPUT CURRENT
VOUT(TYP)
IOUT = 50 mA
-100
VDROP (mV)
IOUT = 30 mA
0
VOUT (50 mV/DIV)
IOUT = 0 mA
IOUT = 90 mA
0
0
100
IOUT (mA)
VOUT(TYP)
VOUT (25 mV/DIV)
3
VIN = VOUT
VIN (V) (50 mV/DIV)
October 1999 TOKO, Inc.
-200
-300
-400
0
10
VIN (V)
20
0
100
200
IOUT (mA)
Page 7
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
REVERSE BIAS CURRENT
(VIN = 0 V)
500
8
400
6
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
100
1.9 V
300
IQ (pA)
10
IREV (µA)
IGND (mA)
GROUND CURRENT VS. OUTPUT
CURRENT
UPPER
2.0 V
4
200
2
100
0
0
0
100
10
0
200
50
VOUT = 1.3 V
0
20
0
20
10
IOUT (mA)
VREV (V)
VIN (V)
QUIESCENT CURRENT (ON
MODE) VS. INPUT VOLTAGE
QUIESCENT CURRENT (ON
MODE) vs. INPUT VOLTAGE
GROUND CURRENT
IOUT = 0 mA
2
IOUT = 0 mA
1.0
2
3V
1
2V
5V
VOUT = 1.9 V
0.5
0
1
10
5
0
0
-50
0
40
IOUT = 150 mA
IOUT = 60 mA
100
VCONT (VOUT, ON POINT)
RCONT = 0 Ω
2.0
VCONT = 5 V
VCONT (V)
400
ICONT (µA)
50
50
TA (°C)
CONTROL CURRENT
500
200
5
2.5
VIN (V)
DROPOUT VOLTAGE
300
IOUT = 30 mA
VOUT = 1.3 to 1.8 V
0
VIN (V)
VDROP (mV)
IOUT = 60 mA
4V
VOUT = 1.3 to 1.8 V
0
IGND (mA)
VOUT =
IQ (mA)
IQ (mA)
VOUT
30
20
1.0
VCONT = 1.8 V
10
100
IOUT = 30 mA
0
-50
0
50
TA (°C)
Page 8
100
0
-50
0
50
TA (°C)
100
0
-50
0
50
100
TA (°C)
October 1999 TOKO, Inc.
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
MAXIMUM OUTPUT CURRENT
LINE VOLTAGE STEP RESPONSE
OUTPUT VOLTAGE VARIATION
VOUT +2 V
UPPER
VOUT = 2.7 V
260
UNDER
VOUT = 2 V
-10 3 V
VOUT = 1.9 V
250
4V
0
5V
-20
240
VOUT = 1.3 V
-50
0
50
100
0
50
100
TIME (50 µs/DIV)
TA (°C)
NOISE LEVEL
NOISE SPECTRUM
LOAD CURRENT STEP RESPONSE
0
NOISE (µV)
dB
CN
VOUT = 3 V
IOUT = 60 mA
200
50 mA
CN = 0.01 F, CL = 2.2 µF
VS.
250
100 mA
-50
CL = 3.3 µF, CN = NONE
CL = 2.2 µF
150
CL = 3.3µF
100 CL = 10 µF
CL = 3.3 µF, CN = 0.1 µF
VOUT
VOUT IOUT
VIN
CN = 0.01 µF, CL = 2.2 µF
-30
-50
TA (°C)
VOUT (50 mV/DIV)
CN = 0.001 µF, CL = .22 µF
VOUT
270
VOUT +1 V
VOUT
10
∆VOUT (mV)
IOUT (mA)
VOUT = 2 to 2.6 V
VOUT (10 mV/DIV)
280
SPECTRUM ANALYZER BACKGROUND NOISE
-100
CN = 0.1 F, CL = 10 µF
50
0
0
500 k
f (Hz)
TIME (50 µs/DIV)
1M
1 PF
10
100
1000 .01 µF
.1
CN
RIPPLE REJECTION
0
I OUT = 30 mA
RR (dB)
-20
-40
CN = 0.01 µF
CN = 0.1 µF
-60
-80
-100
0.01
0.1
1
10
100
f (kHz)
October 1999 TOKO, Inc.
Page 9
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
TK11213B
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.3
IOUT = 0 mA
1.3
VOUT (V)
VOUT (V)
30 mA
60 mA
1.2
1.9 V
2.1 V
VIN = 1.8 V
1.2
150 mA
2.4 V
90 mA
1.1
2.0 V
120 mA
1.1
1.6
1.8
1.7
1.9
2.0
2.1
0
100
VIN (V)
TK11214B
IOUT = 0 mA
1.4
30 mA
60 mA
VOUT (V)
VOUT (V)
300
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.4
200
IOUT (mA)
1.3
1.9 V
2.1 V
VIN = 1.8 V
1.3
2.4 V
150 mA
90 mA
2.0 V
120 mA
1.2
1.2
1.6
1.7
1.8
1.9
2.0
2.1
0
100
300
200
IOUT (mA)
VIN (V)
TK11215B
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.5
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
IOUT = 0 mA
1.5
VOUT (V)
VOUT (V)
30 mA
60 mA
1.4
1.9 V
1.4
VIN = 1.8 V
2.1 V
2.0 V
2.4 V
120 mA
1.3
150 mA
90 mA
1.6
1.7
1.8
1.9
VIN (V)
Page 10
2.0
2.1
1.3
0
100
200
300
IOUT (mA)
October 1999 TOKO, Inc.
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
TK11216B
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
1.6
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
IOUT = 0 mA
1.6
VOUT (V)
VOUT (V)
30 mA
60 mA
1.5
1.9 V
2.1 V
VIN = 1.8 V
1.5
2.0 V
150 mA
2.4 V
120 mA
1.4
90 mA
1.7
1.6
1.8
1.9
2.0
1.4
2.1
0
100
300
200
VIN (V)
IOUT (mA)
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
TK11217B
IOUT = 0 mA
1.7
VOUT (V)
VOUT (V)
1.7
30 mA
1.6
60 mA
1.9 V
1.6
2.1 V
VIN = 1.8 V
2.0 V
150 mA
2.4 V
120 mA
90 mA
1.5
1.5
1.6
1.7
1.8
1.9
2.0
2.1
0
100
200
300
VIN (V)
IOUT (mA)
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
TK11218B
1.8
IOUT = 0 mA
VOUT (V)
VOUT (V)
1.8
90 mA
30 mA
1.7
2.0 V
2.1 V
1.9 V
2.4 V
1.7
150 mA
VIN = 1.8 V
60 mA
1.6
1.7
120 mA
1.8
1.9
2.0
VIN (V)
October 1999 TOKO, Inc.
2.1
2.2
1.6
0
100
200
300
IOUT (mA)
Page 11
TK112xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
TK11219B
OUTPUT VOLTAGE VS. INPUT
VOLTAGE
OUTPUT VOLTAGE vs. OUTPUT
CURRENT
1.9
1.9
VOUT (V)
VOUT (V)
IOUT = 0 mA
1.8
30 mA
1.7
1.7
90 mA
120 mA
1.9
2.0
VIN (V)
Page 12
2.4 V
1.8
150 mA
VIN = 1.9 V
60 mA
1.8
2.2 V
2.1 V
2.0 V
2.1
2.2
1.7
0
100
200
300
IOUT (mA)
October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
OUTPUT VOLTAGE (VOUT)
QUIESCENT CURRENT (IQ)
The output voltage is specified with VIN = (VOUT(TYP) + 1 V)
and IOUT = 30 mA.
The quiescent current is the current which flows through
the ground terminal under no load conditions (IOUT = 0 mA).
DROPOUT VOLTAGE (VDROP)
GROUND CURRENT (IGND)
The dropout voltage is the difference between the input
voltage and the output voltage at which point the regulator
starts to fall out of regulation. Below this value, the output
voltage will fall as the input voltage is reduced. It is
dependent upon the load current and the junction
temperature.
Ground current is the current which flows through the
ground pin(s). It is defined as IIN - IOUT, excluding ICONT.
OUTPUT CURRENT (IOUT(MAX))
This is the maximum continuous output current specified
under the condition where the output voltage drops 0.3 V
below the value specified with IOUT = 30 mA. The input
voltage is set to VOUT +1 V, and the current is pulsed to
minimize temperature effect.
RIPPLE REJECTION RATIO (RR)
Ripple rejection is the ability of the regulator to attenuate
the ripple content of the input voltage at the output. It is
specified with 100 mVrms, 400 Hz superimposed on the
input voltage, where VIN = VOUT + 1.5 V. The output
decoupling capacitor is set to 10 µF, the noise bypass
capacitor is set to 0.1 µF, and the load current is set to 30
mA. Ripple rejection is the ratio of the ripple content of the
output vs. the input and is expressed in dB.
STANDBY CURRENT (ISTBY)
CONTINUOUS OUTPUT CURRENT (IOUT)
Normal operating output current. This is limited by package
power dissipation.
PULSE OUTPUT CURRENT (IOUT(PULSE))
Maximum pulse width 5 ms at VOUT upper 2.0 V; 7 ms. at
VOUT under 1.9 V; duty cycle 12.5%: pulse load only.
LINE REGULATION (Line Reg)
Line regulation is the ability of the regulator to maintain a
constant output voltage as the input voltage changes. The
line regulation is specified as the input voltage is changed
from VIN = VOUT(TYP) + 1 V to VIN = VOUT(TYP) + 6 V.
LOAD REGULATION (Load Reg)
Load regulation is the ability of the regulator to maintain a
constant output voltage as the load current changes. It is
a pulsed measurement to minimize temperature effects
with the input voltage set to VIN = VOUT +1 V. The load
regulation is specified under two output current step
conditions of 1 mA to 60 mA and 1 mA to 100 mA.
October 1999 TOKO, Inc.
Standby current is the current which flows into the regulator
when the output is turned off by the control function
(VCONT = 0 V). It is measured with VIN = 8 V (9 V for the 8
V output device).
SENSOR CIRCUITS
Overcurrent Sensor
The overcurrent sensor protects the device in the event
that the output is shorted to ground.
Thermal Sensor
The thermal sensor protects the device in the event that
the junction temperature exceeds the safe value (TJ = 150
°C). This temperature rise can be caused by external heat,
excessive power dissipation caused by large input to
output voltage drops, or excessive output current. The
regulator will shut off when the temperature exceeds the
safe value. As the junction temperatures decrease, the
regulator will begin to operate again. Under sustained fault
conditions, the regulator output will oscillate as the device
turns off then resets. Damage may occur to the device
under extreme fault conditions.
Page 13
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
Reverse Voltage Protection
Reverse voltage protection prevents damage due to the
output voltage being higher than the input voltage. This
fault condition can occur when the output capacitor remains
charged and the input is reduced to zero, or when an
external voltage higher than the input voltage is applied to
the output side.
If the control function is not used, connect the control
terminal to VIN. When the control function is used, the
control current can be reduced by inserting a series
resistor (RCONT) between the control terminal and VIN. The
value of this resistor should be determined from the graph
below.
CONTROL FUNCTION
CONTROL PIN CURRENT VS.
VOLTAGE
50
VIN
ICONT (µA)
40 VOUT
SW
RC
CN
30
20
RCONT = 0
10
RCONT =100K
0
0
1
2
3
4
5
VCONT (V)
SOT-23L
VIN
SW
RC
CN
SOT-89
Page 14
October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
ON/OFF RESPONSE WITH CONTROL AND LOAD TRANSIENT RESPONSE
The turn-on time depends upon the value of the output capacitor and the noise bypass capacitor. The turn-on time will
increase with the value of either capacitor. The graphs below show the relationship between turn-on time and load
capacitance. If the value of these capacitors is reduced, the load and line regulation will suffer and the noise voltage will
increase. If the value of these capacitors is increased, the turn-on time will increase.
OUTPUT VOLTAGE RESPONSE
(OFF→ON)
OUTPUT VOLTAGE RESPONSE
(OFF→ON)
CL = 2.2 µF
CL = 1.0 µF
CL = 0.47 µF
5
15
25
35
CN = 0.1 µF
VOUT
VOUT
CL = 1.5 µF
45
TIME (µs)
30 to 60 mA
0 to 30 mA
CL = 0.33 µF
ILOAD
CN = 0.01 µF
VCONT
CL = 0.33 µF
ILOAD = 5 to 35 mA
VOUT (200 mV/DIV)
VCONT
ILOAD = 10 mA, CN = 1000 pF
-5
LOAD CURRENT STEP RESPONSE
ILOAD = 30 mA
0
200
400
TIME (µs)
600
800
-5
5
15
25
35
45
TIME( µs)
REDUCTION OF OUTPUT NOISE
Although the architecture of the Toko regulators is designed to minimize semiconductor noise, further reduction can be
achieved by the selection of external components. The obvious solution is to increase the size of the output capacitor.
A more effective solution would be to add a capacitor to the noise bypass terminal. The value of this capacitor should
be 0.1 µf or higher (higher values provide greater noise reduction). Although stable operation is possible without the noise
bypass capacitor, this terminal has a high impedance and care should be taken to avoid a large circuit area on the printed
circuit board when the capacitor is not used. Please note that several parameters are affected by the value of the
capacitors and bench testing is recommended when deviating from standard values.
October 1999 TOKO, Inc.
Page 15
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
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 shut down. The junction temperature
rises as the difference between the input power (VIN x IIN)
and the output power (VOUT x IOUT) 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 on
the recommended mounting pad, the power dissipation of
the SOT-23L is increased to 600 mW. For operation at
ambient temperatures over 25 °C, the power dissipation of
the SOT-23L device should be derated at 4.8 mW/°C. The
power dissipation of the SOT-89 package is 900 mW when
mounted as recommended. Derate the power dissipation
at 7.2 mW/°C for operation above 25 °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 lower the temperature, the better the
reliability of the device. The thermal resistance when
mounted is expressed as follows:
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 usable currents can also be found from the
graph below.
(mW)
3
PD
6
DPD
4
5
25
50
75
TA (°C)
150
Procedure:
1)
2)
3)
4)
Find PD
PD1 is taken to be PD x (~0.8 - 0.9)
Plot PD1 against 25 °C
Connect PD1 to the point corresponding to the 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:
Tj = 0jA x PD + TA
IOUT = (DPD / (VIN(MAX) - VOUT)
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 = 125 °C/ PD
PD is the value when the thermal sensor is activated. A
simple way to determine PD is to calculate VIN x IIN when
Page 16
October 1999 TOKO, Inc.
TK112xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
1000
750
MOUNTED AS
SHOWN
800
FREE AIR
PD (mW)
PD (mW)
600
MOUNTED AS
SHOWN
450
FREE AIR
300
600
400
200
150
0
0
0
50
100
0
150
SOT-23L POWER DISSIPATION CURVE
50
100
150
TA (°C)
TA (°C)
SOT-89 POWER DISSIPATION CURVE
SOT-89 BOARD LAYOUT
SOT-23L BOARD LAYOUT
APPLICATION NOTE
Copper pattern should be as large as possible. Power dissipation is 600 mW for SOT-23L and 900 mV for SOT-89. A
low Equivalent Series Resistance (ESR) capacitor is recommended. For low temperature operation, select a capacitor
with a low ESR at the lowest operating temperature to prevent oscillation, degradation of ripple rejection and increase
in noise. The minimum recommended capacitance is 2.2 µF.
October 1999 TOKO, Inc.
Page 17
TK112xxB
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
Linear regulators require an output capacitor in order to maintain regulator loop stability. This capacitor should be selected
to ensure stable operation over the desired temperature and load range. The graphs below show the effects of
capacitance value and ESR on the stable operation area.
VOUT =
112xxB
2.0 V
CL
3.0 V
5.0 V
ESR
CL = 1 µF
ESR (Ω)
10
STABLE
OPERATION
AREA
1
0.1
0 .01
1000
1000
100
100
100
10
STABLE
OPERATION
AREA
50
100
150
10
STABLE
OPERATION
AREA
10
STABLE
OPERATION
AREA
1
1
1
0.1
0.1
0.1
0.01
0.01
0.01
1
ESR (Ω)
100
CL = 10 µF
1000
ESR (Ω)
1000
ESR (Ω)
CL = 3.3 µF
CL = 2.2 µF
1
IOUT (mA)
50
100
150
1
50
100
150
IOUT (mA)
IOUT (mA)
1
50
100
150
IOUT (mA)
In general, the capacitor should be at least 1 µF (aluminum electrolytic) and be rated for the actual ambient operating
temperature range. The table below shows typical characteristics for several types and values of capacitance. Please
note that the ESR varies widely depending upon manufacturer, type, size, and material.
ESR
Capacitance
Aluminum
Capacitor
Tantalum
Capacitor
Ceramic
Capacitor
1.0 µF
2.4 Ω
2.3 Ω
0.140 Ω
2.2 µF
2.0 Ω
1.9 Ω
0.059 Ω
3.3 µF
4.6 Ω
1.0 Ω
0.049 Ω
10 µF
1.4 Ω
0.5 Ω
0.025 Ω
Note: ESR is measured at 10 kHz.
Page 18
October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
Specification Parameter
TK112xx
TK112xxB
3.0%
2.0%
Quiescent current
180 µA
170 µA
Output current
130 mA
150 mA
Dropout voltage (IOUT = 50 mA)
160 mV
110 mV
Output voltage tolerance
Ripple rejection at low line
regulation point (See Figure below)
Built-in reverse bias protection
Superior
NO
ESD protection
YES
Superior
VOUT
TK112xxB
TK112xx
Input ripple noise
October 1999 TOKO, Inc.
Page 19
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx
TK112xxB
10
8
8
IQ (mA)
10
6
4
2
2
0
100
0
200
100
IOUT (mA)
SHORT CIRCUIT CURRENT
SHORT CIRCUIT CURRENT
5
5
4
4
3
2
0
200
3
2
1
0
150
0
300
0
150
IOUT (mA)
IOUT (mA)
DROPOUT VOLTAGE vs.
OUTPUT CURRENT
DROPOUT VOLTAGE vs.
OUTPUT CURRENT
0
0
-100
-100
VDROP (mV)
VDROP (mV)
0
IOUT (mA)
1
-200
-300
-400
300
-200
-300
-400
0
100
IOUT (mA)
Page 20
6
4
0
VOUT (V)
QUIESCENT CURRENT vs.
OUTPUT CURRENT
VOUT (V)
IQ (mA)
QUIESCENT CURRENT vs.
OUTPUT CURRENT
200
0
100
200
IOUT (mA)
October 1999 TOKO, Inc.
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx
TK112xxB
OUTPUT VOLTAGE VS.
INPUT VOLTAGE
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
VOUT(TYP)
IOUT =
0 mA
VOUT (25 mV/DIV)
VOUT (25 mV/Div)
VOUT(TYP)
IOUT = 30 mA
IOUT = 60 mA
5
IOUT = 60 mA
IOUT = 0 mA
IOUT = 30 mA
IOUT = 50 mA
IOUT = 90 mA
0
VIN = VOUT
VIN (V) (50 mV/Div)
0
REVERSE BIAS CURRENT
REVERSE BIAS CURRENT
VIN = 0 V
500
400
IREV (µA)
IREV (µA)
VIN = 0 V
500
400
300
200
300
200
100
100
0
VIN = VOUT
VIN (V) (50 mV/DIV)
0
10
0
20
0
10
20
VREV (V)
VREV (V)
LOAD REGULATION
LOAD REGULATION
VOUT (5 mV/DIV)
0
50
IOUT (mA)
October 1999 TOKO, Inc.
100
VOUT (5 mV/DIV)
VOUT(TYP)
VOUT(TYP)
0
50
100
IOUT (mA)
Page 21
TK112xxB
COMPARISON BETWEEN TK112xx and TK112xxB
TK112xx
TK112xxB
LINE REGULATION
LINE REGULATION
VOUT(TYP)
VOUT (50 mV/DIV)
VOUT (50 mV/DIV)
VOUT(TYP)
0
10
20
0
VIN (V)
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
QUIESCENT CURRENT (OFF
MODE) VS. INPUT VOLTAGE
IQ (pA)
IQ (pA)
100
50
0
10
VIN (V)
Page 22
20
VIN (V)
100
0
10
20
50
0
0
10
20
VIN (V)
October 1999 TOKO, Inc.
TK112xxB
NOTES
October 1999 TOKO, Inc.
Page 23
TK112xxB
PACKAGE OUTLINE
+0.15
- 0.05
0.4
SOT-23L (SOT-23L-6)
6
5
0.1
M
Marking Information
0.6
4
Product Code
Voltage Code
e1 3.0
Product Code
Voltage Code
1
2
3
0.32
e
+0.15
- 0.05
0.1
5 PL
e
0.95
e 0.95
M
0.95
3.5
e 0.95
Recommended Mount Pad
+0.3
- 0.1
(3.4)
15 max
1.2
0.4
0.15
0 - 0.1
+0.15
- 0.05
1.4 max
0.3
2.2
Note: Pin 2 and Pin 5 should be
grounded for heat dissipation
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
+ 0.3
3.3
4.5
SOT-89 (SOT 89-5)
0.44 max
1.6
0.49 max
6
0.49 max
4
0.4
5
1.0
0.49 max
Lot Number
0.44 max
1.0
Product Code
4.5
2.5
+0.5
-0.3
Voltage Code
1
3
2
0.49 max
0.54 max
e 1.5
e
P
1.0
Marking
0.7 max
0.49 max
0.7 max
1.0
1.5
0.8
0.7
1.5
e' 3.0
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
80
1.5
1.5
0.7
45 °
TK11213B
TK11214B
TK11215B
TK11216B
TK11217B
TK11218B
TK11219B
TK11220B
TK11221B
TK11222B
TK11223B
TK11224B
TK11225B
TK11226B
TK11227B
TK11228B
TK11229B
TK11230B
TK11231B
TK11232B
TK11233B
TK11234B
TK11235B
TK11236B
TK11237B
TK11238B
TK11239B
TK11240B
TK11241B
TK11242B
TK11243B
TK11244B
TK11245B
TK11246B
TK11247B
TK11248B
TK11249B
TK11250B
TK11255B
TK11280B
2.0
e
1.5
e 1.5
Recommended Mount Pad
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
Toko America, Inc. Headquarters
1250 Feehanville Drive, Mount Prospect, Illinois 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, IL 60056
Tel: (847) 297-0070
Fax: (847) 699-7864
Western Regional Office
Toko America, Inc.
2480 North First Street , Suite 260
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Eastern Regional Office
Toko America, Inc.
107 Mill Plain Road
Danbury, CT 06811
Tel: (203) 748-6871
Fax: (203) 797-1223
Semiconductor Technical Support
Toko Design Center
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
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.
Page 24
© 1999 Toko, Inc.
All Rights Reserved
October 1999 TOKO, Inc.
IC-215-TK112B
0798O0.0K
Printed in the USA