TK11347B [TOKO]
VOLTAGE REGULATOR WITH ON/OFF SWITCH; 带ON / OFF开关稳压器
| 型号： | TK11347B |
| 厂家： | 
TOKO, INC |
| 描述： | VOLTAGE REGULATOR WITH ON/OFF SWITCH |
| 文件： | 总13页 (文件大小：156K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TK113xxB
VOLTAGE REGULATOR WITH ON/OFF SWITCH
APPLICATIONS
FEATURES
■ Battery Powered Systems
■ Cellular Telephones
■ High Voltage Precision at ± 2.0%
■ Active Low On/Off Control
■ Very Low Dropout Voltage 80 mV at 30 mA
■ Very Low Noise
■ Pagers
■ Personal Communications Equipment
■ Portable Instrumentation
■ Portable Consumer Equipment
■ Radio Control Systems
■ Toys
■ Very Small SOT-23L or SOT-89-5 Surface Mount
Packages
■ Internal Thermal Shutdown
■ Short Circuit Protection
■ Low Voltage Systems
DESCRIPTION
The TK113xxB is available in either 6 pin SOT-23L or 5 pin
SOT-89-5 surface mount packages.
The TK113xxB is a low dropout linear regulator with a built-
in electronic switch. The device is in the ON state when the
controlpinispulledtoalowlevel. Anexternalcapacitorcan
be connected to the noise bypass pin to lower the output
noise level to 30 µVrms.
TK113XXB
An internal PNP pass transistor is used to achieve a low
dropout voltage of 80 mV (typ.) at 30 mA load current. The
TK113xxB 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 shutdown circuitry
limits the junction temperature to below 150 °C. The load
currentisinternallymonitoredandthedevicewillshutdown
in the presence of a short circuit or overcurrent condition at
the output.
CONTROL
GND
1
2
3
6
5
4
V
IN
20Q
GND
NOISE
BYPASS
V
OUT
NOISE
BYPASS
1
6
V
OUT
GND
5
4
2
3
GND
V
CONTROL
IN
ORDERING INFORMATION
TK113
B
C
Tape/Reel Code
Package Code
BLOCK DIAGRAM
Voltage Code
S
S
S
S
S
S
V
IN
V
OUT
THERMAL
PROTECTION
PACKAGE CODE
M: SOT-23L
TAPE/REEL CODE
L : Tape Left
VOLTAGE CODE
37 = 3.7 V
20 = 2.0 V
S
38 = 3.8 V
U: SOT-89-5
(SOT-23L)
21 = 2.1 V
S
39 = 3.9 V
22 = 2.2 V
B : Tape Bottom
(SOT-89-5)
S
–
+
+
–
40 = 4.0 V
23 = 2.3 V
S
S
CONTROL
41 = 4.1 V
24 = 2.4 V
S
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
60 = 6.0 V
80 = 8.0 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
33 = 3.3 V
34 = 3.4 V
35 = 3.5 V
36 = 3.6 V
S
S
S
S
BANDGAP
REFERENCE
S
S
S
GND
NOISE BYPASS
May, 1997 TOKO, Inc.
Page 1
TK113xxB
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 16 V
Output Current .................................................... 260 mA
Power Dissipation ............................................... (Note 1)
SOT-23L......................................................... 600 mW
SOT-89-5 ....................................................... 900 mW
Reverse Bias............................................................ 10 V
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-30 to +80 °C
Voltage Range ............................................ 1.8 to 14.5 V
Junction Temperature ........................................... 150 °C
TK113XXB ELECTRICAL CHARACTERISTICS
Test conditions: T = 25 °C, unless otherwise specified.
A
SYMBOL
PARAMETER
Quiescent Current
TEST CONDITIONS
= 0 mA, Except I
MIN
TYP
MAX UNITS
I
I
170
250
0.1
µA
µA
V
Q
OUT
CONT
I
Standby Current
Output Voltage
Line Regulation
Load Regulation
V
= 8 V, at output off
IN
STBY
V
I
= 30 mA
See table 1
3.0
O
OUT
Line Reg
Load Reg
V
I
≤ 5.5 V (Note 2)
20
mV
O
= 1 mA → 60 mA (Note 3)
6
30
90
mV
mV
OUT
I
= 1 mA → 100 mA (Note 3)
18
OUT
V
Dropout Voltage
I
= 60 mA
0.12
0.24
150
V
DROP
OUT
I
Continuous Output Current
I
when V drops 0.3 V
OUT
mA
OUT
OUT
from V (typ) (Note 3)
O
RR
Ripple Rejection
f = 400 Hz, C = 10 µF, C = 0.1 µF
55
30
dB
L
N
V
= V
+ 1.5 V, I
= 30 mA,
IN
OUT
OUT
(Note 4)
10 Hz ≤ f ≤ 80 KHz,
= V + 1.5 V, I = 60 mA,
OUT
V
Output Noise Voltage
µVrms
NO
V
CN
OUT
CL = 10 µF, CN = 0.1 µF, (Notes 4,5)
I
Pulse Output Current
5 ms pulse, 12.5% duty cycle
200
35
mA
V
OUT (PULSE)
V
Noise Bypass Terminal Voltage
1.25
12
REF
Control Terminal Specification
I
Control Current
Control Voltage
Output on, V
Output on
Output off
= 1.8 V
CONT
µA
CONT
V -1.8
V
V
IN
CONT
V -0.6
V
IN
∆V /T
Output Voltage Temperature
Coefficient
I = 10 mA
OUT
0.09
mV/°C
O
A
Note 1: When mounted as recommended. Derate at 4.8 mW/°C for SOT-23L and 6.4 mW/°C for SOT-89-5 packages when ambient
temperatures are over 25 °C.
Note 2: For Line Regulation VO > 5.6 V, Typ and Max values are 15 and 40 mV.
Note 3: Refer to Definition of Terms.
Note 4: Ripple Rejection and noise voltage are affected by the value and characteristics of the capacitor used.
Note 5: 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
May, 1997 TOKO, Inc.
TK113xxB
TK113xxB ELECTRICAL CHARACTERISTICS (Table 1)
Output
Voltage
Voltage
Code
VIN Max
VOUT Max
Test
Voltage
Output
Voltage
Voltage
Code
VIN Max
VOUT Max
Test
Voltage
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
5.5
6.0
8.0
37
38
39
40
41
42
43
44
45
46
47
48
49
50
55
60
80
3.630
3.725
3.825
3.920
4.020
4.120
4.215
4.315
4.410
4.510
4.605
4.705
4.800
4.900
5.390
5.880
7.840
3.770
3.875
3.975
4.080
4.180
4.280
4.385
4.485
4.590
4.690
4.795
4.895
5.000
5.100
5.610
6.120
8.160
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
6.5
7.0
9.0
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
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1.94 V
2.04 V
2.14 V
2.24 V
2.34 V
2.44 V
2.54 V
2.64 V
2.74 V
2.84 V
2.94 V
3.04 V
3.14 V
3.24 V
3.335 V
3.435 V
3.535 V
2.06 V
2.16 V
2.26 V
2.36 V
2.46 V
2.56 V
2.66 V
2.76 V
2.86 V
2.96 V
3.06 V
3.16 V
3.26 V
3.36 V
3.465 V
3.565 V
3.665 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
May, 1997 TOKO, Inc.
Page 3
TK113xxB
TEST CIRCUITS
SOT-23L
SOT-89-5
I
IN
I
V
V
IN
V
O
O
IN
S
S
S
S
S
S
A
A
V
V
+
_
+
IN
IN
+
+
+
+
V
I
O
I
1.0 µF
V
2.2 µF
2.2 µF
V
V
O
OUT
IN
_
V
1 µF
IN
6
5
4
6
5
4
NOISE
BYPASS
1
2
3
1
2
3
CONT
Noise Bypass
0.1 µF
I
CONT
CONT
V
0.1 µF
CONT
S
S
A
A
I
+
_
+
_
CONT
V
V
V
CONT
Transient Response
•Connect pin 5 to
ground for heat sink
113XXB
V
V
OUT
IN
Rs
+
C
C
= 10 µF
CONT
+
P
L
to 0.22
1 µF
0.1 µF
TYPICAL PERFORMANCE CHARACTERISTICS
T = 25 °C unless otherwise specified
A
OUTPUT VOLTAGE RESPONSE
LOAD REGULATION
SHORT CIRCUIT CURRENT
(OFF→ ON)
CL = 2.2 µF
V
(5 mV/Div)
O
5
4
3
2
1
0
Cn = 0.01 µF
Cn = 0.1 µF
I
= 30 mA
600
LOAD
400
T=0 200
800
0
50
100
0
150
300
I
(mA)
I
(mA)
OUT
O
TIME (µS)
OUTPUT CURRENT vs.
DROPOUT VOLTAGE
LINE REGULATION
OUTPUT VOLTAGE vs. INPUT
VOLTAGE
50 mV/Div
V
(25mV/Div)
OUT
0
-100
-200
-300
-400
V
TYP
O
I
= 0 mA
V
TYP
O
O
I
= 30 mA
O
I
= 50 mA
O
I
= 90 mA
O
V
= V
V
(V)
0
0
10
(V)
20
0
100
200
IN
OUT
IN
(50 mV/Div)
V
I
(mA)
IN
O
Page 4
May, 1997 TOKO, Inc.
TK113xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
T
= 25 °C unless otherwise specified
A
VIN vs. QUIESCENT CURRENT
(OFF MODE)
OUTPUT CURRENT vs.
QUIESCENT CURRENT
REVERSE BIAS CURRENT
(V = 0 V)
IN
100
10
500
400
1.9 V
8
6
4
2
0
300
200
100
0
50
2.0 V
1.3 V
0
0
10
(V)
20
0
100
200
0
10
20
V
I
(mA)
V
(V)
CC
O
REV
V
vs. QUIESCENT CURRENT
(ON MODE)
V
vs. QUIESCENT CURRENT
(ON MODE)
QUIESCENT CURRENT
IN
IN
I
= 0 mA
I
= 0 mA
O
O
2
2
1
1.0
0.5
V
O
I
= 60 mA
O
V
=
V
V
= 1.9 V
O
O
3 V
5 V
1
0
4 V
2 V
I
= 30 mA
0
O
V
= 1.3 to 1.8 V
= 1.3 to 1.8 V
O
O
0
0
0
5
10
0
2.5
5
-50
50
100
V
(V )
V
(V)
IN
TA (°C)
IN
CONTROL CURRENT
DROPOUT VOLTAGE
V
(V
, ON POINT)
CONT OUT
RC = 0 V
50
40
30
20
10
0
500
400
300
200
100
0
2.0
V
= 5 V
I
= 150 mA
CONT
O
1.0
I
= 60 mA
O
V
= 1.8 V
I
= 30 mA
CONT
50
O
0
-50
0
100
-50
0
50
100
-50
0
50
100
T
(°C)
T
(°C)
T
(°C)
A
A
A
May, 1997 TOKO, Inc.
Page 5
TK113xxB
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
T = 25 °C unless otherwise specified
A
MAXIMUM OUTPUT CURRENT
OUTPUT VOLTAGE VARIATION
LINE VOLTAGE STEP RESPONSE
50 µs/Div
V
+2
280
270
O
V
= 2.7 V
OUT
V
+1
O
10
V
IN
V
= 2 to 2.6 V
2 V
OUT
4 V
Cn = 0.001, CL = .22 µF
260
250
240
0
-10
-20
-30
3 V
5 V
V
OUT
10 mV/Div
V
= 1.9 V
= 1.3 V
OUT
V
Cn = 0.01, CL = 2.2 µF
OUT
-50
0
50
100
-50
0
50
100
T
(°C)
T (°C)
A
A
NOISE LEVEL vs. C
N
LOAD CURRENT STEP
RESPONSE
NOISE SPECTRUM
0
250
200
150
100
50
50 µs/Div
V
= 3 V
O
100 mA
I
= 60 mA
O
I
50 mA
OUT
CL = 2.2 µF
-50
CL = 3.3 µF
CL = 10 µF
CL = 3.3 µF, Cn = None
CL = 3.3 µF, Cn = 0.1 µF
Cn = 0.01, CL = 2.2 µF
50 mV/Div
V
OUT
Spectrum Analyzer Background Noise
-100
Cn = 0.1, CL = 10 µF
0
0
500 k
1 M
1 pF 10
100 1000 .01 µF .1
Cn
Frequency (Hz)
Page 6
May, 1997 TOKO, Inc.
TK113xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
.
RIPPLE REJECTION RATIO
OUTPUT VOLTAGE (V )
O
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
inputvoltage,whereV =V +1.5V. Theoutputdecoupling
The output voltage is specified with V = (V
+ 1 V)
IN
O(TYP)
and I = 30 mA.
O
DROPOUT VOLTAGE (V
)
IN
O
DROP
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
rejectionistheratiooftheripplecontentoftheoutputvs.the
input and is expressed in dB.
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 tempera-
ture.
STANDBY CURRENT
Standbycurrentisthecurrentwhichflowsintotheregulator
when the output is turned off by the control function (V
OUTPUT CURRENT (I MAX)
CONT
O
= V .) It is measured with V = 8 V (9 V for the 8 V output
IN
IN
device.)
The rated output current is specified under the condition
where the output voltage drops 0.3 V below the value
specified with I = 30 mA. The input voltage is set to V +1
SENSOR CIRCUIT
O
O
V, and the current is pulsed to minimize temperature effect.
Over current sensor
CONTINUOUS OUTPUT CURRENT (I )
O
Theovercurrentsensorprotectsthedeviceintheevent
that the output is shorted to ground.
Normal operated output current. This is limited by package
power dissipation.
Thermal sensor
PULSE OUTPUT CURRENT (I
)
O (PULSE)
The thermal sensor protects the device in the event
that the junction temperature exceeds the safe value
Max pulsewidth 5ms, Duty cycle 12.5%: pulse load only
(T = 150 °C). This temperature rise can be caused by
J
external heat, excessive power dissipation caused by
largeinputtooutputvoltagedrops, orexcessiveoutput
current. The regulator will shut off when the tempera-
ture exceeds the safe value. As the junction tempera-
tures 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.
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 V = V + 1V to V = V + 6V.
IN
O
IN
O
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 V = V +1 V. The load
regulation is specified under two output current step condi-
tions of 1 mA to 60 mA and 1 mA to 100 mA.
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 capaci-
tor 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.
IN
O
QUIESCENT CURRENT (IQ)
The quiescent current is the current which flows through
the ground terminal under no load conditions (I = 0 mA)
O
May, 1997 TOKO, Inc.
Page 7
TK113xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
CONTROL FUNCTION
SOT-23L
SOT-89-5
V
IN
V
IN
6
5
4
3
6
4
SW
1
2
1
2
3
R c
SW
R c
C
NP
C
NP
If the control function is not used, connect the control terminal to ground When the control function is used, the
.
control current can be reduced by inserting a series resistor (Rc) between the control terminal and V . The value of
IN
this resitor should be determined from the graph below.
CONTROL PIN VOLTAGE vs.
CURRENT
50
40
30
20
10
0
V
OUT
RC =100k
RC = 0
0
1
2
3
4
5
V
(V)
CONT
Page 8
May, 1997 TOKO, Inc.
TK113xxB
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 graph below shows 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
OUTPUT VOLTAGE RESPONSE
LOAD CURRENT STEP
R
(OFF→ON)
(OFF→ON)
200 mV/DIV
B
C
C
= 0.1 µF
N
1.0 µF
CL = 0.33
CL = 0.33 µF
1.5 µF
A
0.47 µF
C
= 0.1 µF
600
N
-5
5
LOAD
15
= 10 mA, C
25
35
45
0
I
200
400
800
-5
5
15
25
35
45
I
= 1000 pF
= 30 mA, C = 2.2 µF
NP
LOAD
L
TIME (µS)
I
LOAD
A = 0 to 30, B = 5 to 35, C = 30 to 60 mA
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
circuitboardwhenthecapacitorisnotused. Pleasenotethatseveralparametersareaffectedbythevalueofthecapacitors
and bench testing is recommended when deviating from standard values.
May, 1997 TOKO, Inc.
Page 9
TK113xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
INPUT-OUTPUT CAPACITORS
Linear regulators require an output capacitor in order to maintain regulator loop stability. This capacitor should be selected
to insure stable operation over the desired temperature and load range. The graphs below show the effects of capacitance
value and equivalent series resistance (ESR) on the stable operation area.
113xxB
2.0 V
C
L
3.0 V
5.0 V
C = 3.3 µF
C = 1 µF
C = 2.2 µF
C = 10 µF
L
L
L
L
1000
100
1000
100
1000
100
1000
100
10
1
10
1
10
1
10
1
STABLE
OPERATION
AREA
STABLE
OPERATION
AREA
STABLE
OPERATION
AREA
STABLE
OPERATION
AREA
0.1
0.1
0.1
0.1
0 .01
0.01
0.01
0.01
Q 1
Q 1
Q 1
Q 1
150
150
150
150
100
(mA)
100
(mA)
100
(mA)
100
(mA)
50
50
50
50
I
I
I
I
OUT
OUT
OUT
OUT
In general, the capacitor should be at least 1 µF (Aluminum electrolytic) and be rated for the actual ambient operating
temperaturerange. Thetablebelowshowstypicalcharacteristicsforseveraltypesandvaluesofcapacitance. Pleasenote
that the ESR varies widely depending upon manufacturer, type, size, and material.
ESR
ESR
Tantalum
Aluminum
Ceramic
Capacitor
Capacitor
Capacitor
Capacitance
ESR
1.0 µF
2.2
3.3
10.0
2.4 Ω
2.0 Ω
4.6 Ω
1.4 Ω
2.3 Ω
1.9 Ω
1 .0 Ω
0.5 Ω
0.14 Ω
0.059 Ω
0.049 Ω
0.025 Ω
ES
Note: ESR is measured at 10 KHz.
Page 10
May, 1997 TOKO, Inc.
TK113xxB
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
PACKAGE POWER DISSIPATION (P )
D
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 (V X I ) and the output power
IN
IN
(V
X I
) increases. The rate of temperature rise is greatly affected by the mounting pad configuration on the PCB,
OUT
OUT
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-89-5 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 - T ) is the derating factor. The PCB mounting
A
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:
T = 0 X P + T
A
J
JA
D
For Toko ICs, the internal limit for junction temperature is 150 °C. If the ambient temperature, T is 25 °C, then:
A
150 °C = 0 X P + 25 °C
JA
D
0
0
X P = 125 °C
JA
JA
D
= 125 °C/ P
D
P isthevaluewhenthethermalsensorisactivated. AsimplewaytodeterminePDistocalculateV XI whentheoutput
D
IN
IN
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)
3
P
D
6
D
pd
4
5
Procedure:
1.) Find P
25
50
75
T (°C)
150
D
2.) P is taken to be P X (≈0.8 ~ 0.9)
D1
D
3.) Plot P against 25 °C
D1
4.) Connect P
to the point corresponding to the 150 °C with a straight line.
D1
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 P against the point at which the vertical line intersects the derating curve. This is taken as the
D
maximum power dissipation, D
.
PD
May, 1997 TOKO, Inc.
Page 11
TK113xxB
The maximum operating current is:
I
= (D /(V
- V
).
OUT
OUT
PD
IN(MAX)
V
V
IN
O
V
V
O
IN
+
+
+
+
ON/OFF
ON/OFF
GND
SOT-89-5 Board Layout
SOT-23L Board Layout
1.0
750
600
450
300
150
Mounted as
shown
0.8
0.6
0.4
Mounted as shown
Unmounted
0.2
0
Unmounted
0
0
0
50
100
150
50
100
150
T
(°C)
T
(°C)
A
A
SOT-23L Power Dissipation Curve
SOT-89-5 Power Dissipation Curve
APPLICATION HINTS
Copper pattern should be as large as possible. Power dissi-
pation is 600 mW for SOT-23L and 900 mV for SOT-89-5. A
low 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 recom-
mended capacitance is 2.2 µF.
Page 12
May, 1997 TOKO, Inc.
TK113xxB
PACKAGE OUTLINE
+ 0.15
-
0.05
Marking Information
SOT-23L
0.4
0.1
M
0.6
Product Code
Q
5
6
4
Marking
Voltage Code
TK11320B
TK11321B
TK11322B
TK11323B
TK11324B
TK11325B
TK11326B
TK11327B
TK11328B
TK11329B
TK11330B
TK11331B
TK11332B
TK11333B
TK11334B
TK11335B
TK11336B
TK11337B
TK11338B
TK11339B
TK11340B
TK11341B
TK11342B
TK11343B
TK11344B
TK11345B
TK11346B
TK11347B
TK11348B
TK11349B
TK11350B
TK11355B
TK11360B
TK11380B
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
60
80
Product Code
Voltage Code
+ 0.15
0.05
1
2
3
-
5-0.32
0.1
M
e 0.95 e 0.95
Recommended Mount Pad
e
e
0.95
0.95
(Pin 2 and pin 5 should be
grounded for heat dissipation)
+ 0.3
0.1
3.4 -
0.2
±
2.2
0.2
0.4±
0.3
3.3±
4.5
1.6
0.44max
SOT-89-5
0.49max
6
0.49max 0.49max
4
5
Voltage Code
Product Code
0.44max
1
3
2
0.49max
0.49max
0.54max
0.7max
0.7max
1.0
e
e
1.5
1.5
e'
3.0
45fl
2.0
e
e
1.5
1.5
Recommended Mount Pad
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.
TOKO AMERICA REGIONAL OFFICES
Western Regional Office
Toko America, Inc.
Eastern Regional Office
Toko America, Inc.
Semiconductor Technical Support
Toko Design Center
Midwest Regional Office
Toko America, Inc.
1250 Feehanville Drive
Mount Prospect, Il 60056
Tel: (847) 297-0070
2480 North First Street, Suite 260 107 Mill Plain Road
4755 Forge Road
Colorado Springs, CO 80907
Tel: (719) 528-2200
San Jose, CA 95131
Tel: (408) 432-8281
Fax: (408) 943-9790
Danbury, CT 06811
Tel: (203) 748-6871
Fax: (203) 797-1223
Fax: (719) 528-2375
Fax: (847) 699-7864
IC-214-TK113B
0597O2500
http://www.tokoam.com
May, 1997 TOKO, Inc.
© 1997 Toko, Inc.
All rights reserved
Printed in the USA
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