TK71524S [TOKO]
LOW DROPOUT VOLTAGE REGULATOR; 低压差稳压器
| 型号： | TK71524S |
| 厂家： | 
TOKO, INC |
| 描述： | LOW DROPOUT VOLTAGE REGULATOR |
| 文件： | 总13页 (文件大小：80K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TK715xx
LOW DROPOUT VOLTAGE REGULATOR
APPLICATIONS
FEATURES
■ Battery Powered Systems
■ Cellular Telephones
■ Pagers
■ High Voltage Precision at ± 2.0% or ± 60 mV
■ Very Low Quiescent Current
■ Very Low Dropout Voltage
■ Reverse Bias Protection
■ Personal Communications Equipment
■ Portable Instrumentation
■ Portable Consumer Equipment
■ Radio Control Systems
■ Toys
■ Miniature Package (SOT-23-3)
■ Short Circuit Protection
■ High Ripple Rejection
■ Low Voltage Systems
DESCRIPTION
The TK715xx is a low dropout linear regulator housed in a
small SOT-23-3 package, rated at 350 mW. An internal
PNP transistor is used to achieve a low dropout voltage of
105mV(typ.)at50mAloadcurrent.Thisdeviceoffershigh
precision output voltage of ± 2.0 % or ± 60 mV. The
TK715xx has a very low quiescent current of 25 µA (typ.)
at no load. The low quiescent current and dropout voltage
make this part ideal for battery powered applications. The
internalreversebiasprotectioneliminatestherequirement
for a reverse voltage protection diode, saving cost and
board space. The high 64 dB ripple rejection and low noise
provide enhanced performance for critical applications.
TK715xxS
V
IN
0P
GND
V
OUT
ORDERING INFORMATION
TK715 SCL
BLOCK DIAGRAM
Tape/ Reel Code
Temp. Code
Voltage Code
Package Code
V
V
OUT
IN
VOLTAGE CODE
TEMPERATURE CODE
TAPE/REEL CODE
L: Tape Left
THERMAL
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
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
60 = 6.0 V
70 = 7.0 V
80 = 8.0 V
90 = 9.0 V
C -30 to +80
C
PROTECTION
PACKAGE CODE
S : SOT-23-3
-
-
+
+
BANDGAP
REFERENCE
GND
January 1999 TOKO, Inc.
Page 1
TK715xx
ABSOLUTE MAXIMUM RATINGS (VOUT ≥ 5.0 V)
Supply Voltage .............................................. -0.4 to 16 V
Power Dissipation (Note 1) ................................ 350 mW
Reverse Bias.............................................................. 8 V
Storage Temperature (Ambient) ...............-55 to +150 °C
Operating Temperature (Ambient) ..............-30 to +80 °C
Max. Operating Temperature (Junction) ............... 125 °C
Operating Voltage Range............................ 1.8 to 14.0 V
Junction Temperature ........................................... 150 °C
Lead Soldering Temperature (10 s) ...................... 235 °C
TK715xx ELECTRICAL CHARACTERISTICS (VOUT ≥ 5.0 V)
Test conditions: T = 25 °C, unless otherwise specified.
A
SYMBOL
IQ
PARAMETER
Quiescent Current
TEST CONDITIONS
OUT = 0 mA, VOUT ≤ 4.0 V
OUT = 0 mA, VOUT ≥ 4.1 V
MIN
TYP
MAX
45
UNITS
µA
I
I
25
30
50
µA
IGND
Ground Current
Output Voltage
IOUT = 50 mA
IOUT = 10 mA
1.4
2.5
mA
V
VOUT
See Table 1
VIN = VOUT(TYP) + 1 V to
VOUT(TYP) + 6 V
Line Reg
Load Reg
Line Regulation
Load Regulation
1.0
10
mV
I
OUT = 5 to 50 mA, (Note 2)
10
30
mV
mV
V
IOUT = 5 to 100 mA, (Note 2)
IOUT = 50 mA
20
50
0.105
0.185
0.185
.0180
0.280
0.330
100
VDROP
Dropout Voltage
I
OUT = 100 mA, VOUT ≥ 2.4 V
V
IOUT = 100 mA, VOUT < 2.4 V
V
IOUT
Continuous Output Current
Ripple Rejection
mA
dB
RR
(Notes 3,4)
64
35
∆VOUT / ∆T
Temperature Coefficient
I
OUT = 10 mA
ppm/° C
Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/°C 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: Ripple rejection is measured at V = 200 mVrms, V = V
+ 2 V, I
= 10 mA, C = 4.7 µF, f = 100 Hz.
R
IN
OUT(TYP)
OUT L
Gen. Note: Parameters with min. or max. values are 100% tested at T = 25 °C.
A
Page 2
January 1999 TOKO, Inc.
TK715xx
ABSOLUTE MAXIMUM RATINGS (VOUT≤ 6.0 V)
Supply Voltage .............................................. -0.4 to 16 V
Power Dissipation (Note 1) ................................ 350 mW
Reverse Bias .............................................................. 8 V
Storage Temperature (Ambient) ...............-55 to +150 °C
Operating Temperature (Ambient) ..............-30 to +80 °C
Max. Operating Temperature (Junction) ............... 125 °C
Operating Voltage Range............................ 2.5 to 14.0 V
Junction Temperature ........................................... 150 °C
Lead Soldering Temperature (10 s) ...................... 235 °C
TK715xx ELECTRICAL CHARACTERISTICS (VOUT ≤ 6.0 V)
Test conditions: T = 25 °C, unless otherwise specified.
A
SYMBOL
IQ
PARAMETER
Quiescent Current
TEST CONDITIONS
IOUT = 0 mA
MIN
TYP
32
MAX
60
UNITS
µA
IGND
Ground Current
Output Voltage
IOUT = 50 mA
IOUT = 10 mA
1.4
2.5
mA
V
VOUT
See Table 1
VIN = VOUT(TYP) + 1 V to
VOUT(TYP) + 6 V or Max 14 V
Line Reg
Load Reg
Line Regulation
Load Regulation
3.0
mV
IOUT = 5 to 50 mA, (Note 2)
IOUT = 5 to 100 mA, (Note 2)
10
20
30
50
mV
mV
I
OUT = 50 mA
0.105
0.185
.0180
0.280
100
V
VDROP
Dropout Voltage
IOUT = 100 mA
V
IOUT
Continuous Output Current
Ripple Rejection
mA
RR
(Notes 3,4)
64
35
dB
∆VOUT / ∆T
Temperature Coefficient
IOUT = 10 mA
ppm/° C
Note 1: Power dissipation is 350 mW when mounted as recommended. Derate at 2.8 mW/°C 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: Ripple rejection is measured at V = 200 mVrms, V = V
+ 2 V, I
= 10 mA, C = 4.7 µF, f = 100 Hz.
R
IN
OUT(TYP)
OUT L
Gen. Note: Parameters with min. or max. values are 100% tested at T = 25 °C.
A
January 1999 TOKO, Inc.
Page 3
TK715xx
TK715xx ELECTRICAL CHARACTERISTICS TABLE 1
Output
Voltage
Voltage
Code
VOUT(MIN)
VOUT(MAX)
Test
Voltage
Output
Voltage
Voltage
Code
VOUT(MIN)
VOUT(MAX)
Test
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
6.0 V
7.0 V
8.0 V
9.0 V
37
38
39
40
41
42
43
44
45
46
47
48
49
50
60
70
80
90
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
5.880 V
6.860 V
7.840 V
8.820 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
6.120 V
7.140 V
8.160 V
9.180 V
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
7.0 V
8.0 V
9.0 V
9.0 V
1.9 V
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
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
1.840 V
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
1.960 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
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
Page 4
January 1999 TOKO, Inc.
TK715xx
TEST CIRCUIT
I
IN
V
IN
V
V
V
OUT
IN
OUT
+
_
+
+
C
2.2 µF
I
OUT
L
C
IN
0.1 µF
GND
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, unless otherwise specified.
OUTPUT VOLTAGE VS
INPUT VOLTAGE
.
LOAD REGULATION
SHORT CIRCUIT PROTECTION
V
TYPICAL
OUT
5
4
3
2
V
TYPICAL
OUT
I
= 30 mA
I
= 0 mA
OUT
OUT
I
= 60 mA
OUT
I
= 90 mA
OUT
1
0
0
50
(mA)
100
0
100
200
0
V
= V
OUT
IN
V
I
I
(mA)
(V) (50 mV/DIV)
IN
OUT
OUT
REVERSE BIAS CURRENT RANGE
(V = 0 V)
QUIESCENT CURRENT VS.
INPUT VOLTAGE
LINE REGULATION
IN
V
TYPICAL
I
= 0 mA
100
2
OUT
OUT
80
60
40
20
0
V
= 2.0 V
OUT
1
0
V
V
= 3 V
OUT
5
V
= 8.0 V
OUT
0
10
20
0
5
10
0
10
V
(V)
V
(V)
(V)
IN
IN
REV
January 1999 TOKO, Inc.
Page 5
TK715xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
OUTPUT CURRENT VS.
DROPOUT VOLTAGE
GROUND CURRENT 2 VS.
OUTPUT CURRENT
GROUND CURRENT 1 VS.
OUTPUT CURRENT
5
0
500
4
3
2
400
300
200
-100
-200
1
0
100
0
0
50
(mA)
100
0
20
40
60
80
100
0
5
10
15
20
25
100
10
I
I
(mA)
I
(mA)
OUT
OUT
OUT
MAXIMUM OUTPUT CURRENT VS.
TEMPERATURE
NOISE LEVEL VS.
OUTPUT CURRENT
OUTPUT VOLTAGE VS.
TEMPERATURE
200
C
=
1 µF
2.2 µF
3.3 µF
4.7 µF
10 µF
220
200
180
160
150
L
20
10
V
IS 2.7 V OR MORE
OUT
180
160
140
3.0 V
0
2.9 V
-10
-20
-30
120
100
C
=10 µF
IN
BW = 10 Hz to 80 kHz
-50
0
50
100
-50
0
50
0
50 100
T
(°C)
T
(°C)
I
(mA)
A
A
OUT
NOISE LEVEL VS.
C
L
RIPPLE REJECTION
0
I
= 10 mA
200
OUT
C
=10 µF
IN
BW = 10 Hz to 80 kHz
-20
180
160
140
V
IN
V
OUT
I
=
OUT
5 mA
10 mA
30 mA
60 mA
90 mA
715xx
-40
-60
C
C
L
IN
0.1 to 1 µF
4.7 µF
C
= 4.7 µF
L
-80
RIPPLE REJECTION CIRCUIT
120
100
-100
0.01
0.1
1
1.0
5.0
10
C
(µF)
f (kHz)
L
Page 6
January 1999 TOKO, Inc.
TK715xx
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 °C, unless otherwise specified.
LOAD CURRENT STEP RESPONSE 2
LINE VOLTAGE STEP RESPONSE
NOISE SPECTRUM
R = 1 kHz, V = 100 Hz
B
V
+ 2 V
OUT
C
=4.7 µF
L
B
V
+ 1 V
OUT
C
= 4.7 µF, I
OUT
= 60 mA
= 5 mA
L
I
= 0 to 100 mA
OUT
C
= 4.7 µF, I
OUT
L
-50
C
L
= 4.7 µF
I
= 0 to 30 mA
OUT
SPECTRUM ANALYZER BACK-
GROUND NOISE
-100
I
= 10 mA
OUT
0
500 k
1 M
NOTE: V
OUT2
DELAYED 50 µs FOR CLARITY
TIME (50 µs/ DIV)
TIME (50 µs/ DIV)
f (kHz)
LOAD CURRENT STEP RESPONSE 1
=4.7 µF
C
L
I
= 5 to 100 mA
OUT
I
= 5 to 30 mA
OUT
NOTE: V
OUT2
DELAYED 50 µs FOR CLARITY
TIME (50 µs/ DIV)
January 1999 TOKO, Inc.
Page 7
TK715xx
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
current.
OUTPUT VOLTAGE (VOUT
)
RIPPLE REJECTION RATIO (RR)
The output voltage is specified with VIN = (VOUT(TYP) + 1 V)
and IOUT = 30 mA.
Ripple rejection is the ability of the regulator to attenuate
the ripple content of the input voltage at the output. It is
specified with 200 mVrms, 100 Hz superimposed on the
input voltage, where VIN = VOUT(TYP) + 2.0 V. The output
decoupling capacitor is set to 4.7 µF and the load current
is set to 5 mA. Ripple rejection is the ratio of the ripple
content of the output vs. the input and is expressed in dB.
DROPOUT VOLTAGE (VDROP
)
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.
REVERSE VOLTAGE PROTECTION
CONTINUOUS OUTPUT CURRENT (IOUT
)
Reverse voltage protection prevents damage due to the
output voltage being higher than the input voltage. This
faultconditioncanoccurwhentheoutputcapacitorremains
charged and the input is reduced to zero, or when an
external voltage higher than the input voltage is applied to
the output side.
Normaloperatingoutputcurrent.Thisislimitedbypackage
power dissipation.
PULSE OUTPUT CURRENT (IOUT(PULSE)
)
Maximumpulsewidth5msatVOUT above2.0V, dutycycle
12.5%: pulse load only.
REDUCTION OF OUTPUT NOISE
Although the architecture of the Toko regulators are
designed to minimize semiconductor noise, further
reduction can be achieved by the selection of external
components. The obvious solution is to increase the size
oftheoutputcapacitor.Pleasenotethatseveralparameters
are affected by the value of the capacitors and bench
testing is recommended when deviating from standard
values.
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 or VIN =
max 14 V.
LOAD REGULATION (Load Reg)
PACKAGE POWER DISSIPATION (PD)
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(TYP) +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.
This is the power dissipation level at which the thermal
sensor is activated. The IC contains an internal thermal
sensorwhichmonitorsthejunctiontemperature. Whenthe
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-23-3 is increased to 350 mW. For operation at
ambient temperatures over 25 °C, the power dissipation of
the SOT-23-3 device should be derated at 2.8 mW/°C. To
QUIESCENT CURRENT (IQ)
The quiescent current is the current which flows through
thegroundterminalundernoloadconditions(IOUT =0mA).
GROUND CURRENT (IGND
)
Ground current is the current which flows through the
ground pin(s). It is defined as IIN - IOUT, excluding control
Page 8
January 1999 TOKO, Inc.
TK715xx
DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.)
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.
Calculatethepowerdissipationofthedevicebysubtracting
the output power from the input power. These
measurements should allow for the ambient temperature
ofthePCB. ThevalueobtainedfromPD /(150 °C-TA)isthe
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
thermalresistancewhenmountedisexpressedasfollows:
3) Plot PD1 against 25 °C
4) 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:
I
OUT = (DPD / (VIN(MAX) - VOUT)
Tj = 0jA x PD + TA
500
For Toko ICs, the internal limit for junction temperature is
150 °C. If the ambient temperature (TA) is 25 °C, then:
MOUNTED AS
SHOWN
400
300
200
FREE AIR
150 °C = 0jA x PD + 25 °C
0jA = 125 °C/ PD
100
0
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.
0
50
100
150
T
A
(°C)
The range of usable currents can also be found from the
graph below.
SOT-23-3 POWER DISSIPATION CURVE
(mW)
3
P
D
6
D
PD
4
5
25
50
75
(°C)
150
T
A
Procedure:
1) Find PD
2) PD1 is taken to be PD x (~ 0.8 - 0.9)
January 1999 TOKO, Inc.
Page 9
TK715xx
APPLICATION INFORMATION
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output capacitors in order to maintain regulator loop stability. The output capacitor
should be selected within the Equivalent Series Resistance (ESR) range as shown in the graphs below for stable
operation. When a ceramic capacitor is connected in parallel with the output capacitor, a maximum of 1000 pF is
recommended. This is because the ceramic capacitor's electrical characteristics (capacitance and ESR) vary widely over
temperature. If a large ceramic capacitor is used, a resistor should be connected in series with it to bring it into the stable
operating area shown in the graphs below. Minimum resistance should be added to maintain load and line transient
response.
Note: It is very important to check the selected manufacturers electrical characteristics (capacitance and ESR) over
temperature.
TK715xxS
715xxS
C
C
L
L
ESR
ESR
Note: It is not necessary to connect a ceramic capacitor
in parallel with an aluminum or tantalum output capacitor.
C = 4.7 µF
C =1.0µF
C = 2.2 µF
L
L
L
100
100
10
100
10
10
STABLE
STABLE
OPERATION
AREA
STABLE
OPERATION
AREA
OPERATION
1
1
1
AREA
0.1
0.1
0 .01
0.1
0 .01
0 .01
0
50
(mA)
100
0
50
100
0
50
100
I
I
(mA)
OUT
OUT
I
(mA)
OUT
Page 10
January 1999 TOKO, Inc.
TK715xx
APPLICATION INFORMATION (CONT.)
In general, the capacitor should be at least 1 µF 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
2.2 µF
3.3 µF
10 µF
2.4 Ω
2.0 Ω
4.6 Ω
1.4 Ω
2.3 Ω
1.9 Ω
1.0 Ω
0.5 Ω
0.140 Ω
0.059 Ω
0.049 Ω
0.025 Ω
Note: ESR is measured at 10 kHz.
BOARD LAYOUT
Copper pattern should be as large as possible. Power dissipation is 350 mW for SOT-23-3. 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 recommended capacitance is
2.2 µF.
The internal reverse bias protection eliminates the requirement for a reverse voltage protection diode. This saves both
cost and board space.
V
GND
V
IN
OUT
+
+
SOT-23-3 BOARD LAYOUT
January 1999 TOKO, Inc.
Page 11
TK715xx
APPLICATION INFORMATION (CONT.)
REVERSE BIAS PROTECTION
SWITCHING OPERATION
The internal reverse bias protection eliminates the
requirement for a reverse voltage protection diode. This
saves both cost and board space.
Even though the input voltages or the output voltages are
different, the outputs of the TK715xx regulators can be
connected together, and the output voltages switched. If
two or more TK715xx regulators are turned ON
simultaneously, the highest output voltage will be present.
V
V
OUT
IN
715xxS
V
IN
IN
TK71530
TK71528
GND
V
V
OUT
3.0 OR 2.8 V
Another reverse bias protection technique is illustrated
below. The extra diode and extra capacitor are not
necessary with the TK715xx. The high output voltage
accuracy is maintained because the diode forward voltage
variations over temperature and load current have been
eliminated.
CURRENT BOOST OPERATION
The output current can be increased by connecting an
external PNP transistor as shown below. The output
current capability depends upon the Hfe of the external
transistor. Note: The TK715xx internal short circuit
protection and thermal sensor do not protect the external
transistor.
V
V
OUT
IN
TK715xxS
V
IN
V
IN
V
OUT
PARALLEL OPERATION
TK715xx
150 Ω
3.3 µF
0.22 µF
TheseriesresistorRisputintheinputlineofthelowoutput
voltage regulator in order to prevent overdissipation. The
voltage dropped across the resistor reduces the large
input-to-output voltage across the regulator, reducing the
power dissipation in the device.
V
IN
5 V
3 V
TK71550
TK71530
R
2 V
TK71520
Page 12
January 1999 TOKO, Inc.
TK715xx
PACKAGE OUTLINE
Marking Information
SOT-23-3
Product Code
T
0.7
Voltage Code
19
3
TK71519S
TK71520S
TK71521S
TK71522S
TK71523S
TK71524S
TK71525S
TK71526S
TK71527S
TK71528S
TK71529S
TK71530S
TK71531S
TK71532S
TK71533S
TK71534S
TK71535S
TK71536S
TK71537S
TK71538S
TK71539S
TK71540S
TK71541S
TK71542S
TK71543S
TK71544S
TK71545S
TK71546S
TK71547S
TK71548S
TK71549S
TK71550S
TK71560S
TK71570S
TK71580S
TK71590S
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
60
Marking
e
e
Product Code
0.95 0.95
Voltage Code
e1
1.90
Recommended Mounting Pad
+ 0.1
0.4
0.1
C1
e
e
0.95
0.95
1
2
1.6
2.9
(0.4)
0.1
+ 0.3
2.8
Dimensions are shown in millimeters
Tolerance: x.x = ± 0.2 mm (unless otherwise specified)
70
80
90
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
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
Fax: (847) 699-7864
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.
January 1999 TOKO, Inc.
Page 13
Printed in the USA
© 1999 Toko, Inc.
IC-xxx-TK715xx
0798O0.0K
All Rights Reserved
相关型号：
TK71524SC
Fixed Positive LDO Regulator, 2.4V, 0.28V Dropout, PDSO3, MINIATURE, SOT-23, 3 PINWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71524SCL
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71524SCL/24
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525AS
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525ASCL
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525ASCL/25
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525S
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525SC
Fixed Positive LDO Regulator, 2.5V, 0.28V Dropout, PDSO3, MINIATURE, SOT-23, 3 PINWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525SCL
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71525SCL/25
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
TK71526
LOW DROPOUT VOLTAGE REGULATORWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
TOKO
©2020 ICPDF网 联系我们和版权申明