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TK71740S 데이터시트 PDF




TOKO에서 제조한 전자 부품 TK71740S은 전자 산업 및 응용 분야에서
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부품번호 TK71740S 기능
기능 LOW DROPOUT VOLTAGE REGULATOR
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TK71740S 데이터시트, 핀배열, 회로
TK717xxS
LOW DROPOUT VOLTAGE REGULATOR
FEATURES
n Very Good Stability (CL = 0.22 mF is Stable For
Any Type Capacitor withVOUT ³ 1.8 V)
n Built-in Shunt Circuit of Output to GND. The Stored
Energy of the Output Capacitor is Discharged
Quickly
n Wide Operating Voltage Range (1.8 V ~ 14 V)
n Very Low Dropout Voltage (V = 103 mV at
DROP
100 mA)
n Peak Output Current is 370 mA (0.3 V DROP Point)
n Very Low Quiescent Current (IQ = 72 uA at IOUT = 0 mA)
n Good Ripple Rejection Ratio (80 dB at 1 kHz)
n High Precision Output Voltage (± 1.5 % or ± 50 mV)
n Suitable for Very Low Noise Applications
n Built-in Active High On/Off Control (0.1 mA Max
Standby Current)
n Built-in Short Circuit Protection
n Built-in Thermal Shutdown
n Very Small Surface Mount Package (SOT23-5)
APPLICATIONS
n Battery Powered Systems
n Measurement Systems
n Mobile Communications Systems
n Cordless Phone, PHS, GSM, CDMA
n Industrial Equipment
n Personal Computers, Barcode Readers
low quiescent current of 72 mA at no load and 0.8 mA with
a 50 mA load. The standby current is typically 100 pA. The
circuit features very good stability. The ripple rejection is 90
dB at 400 Hz and 80 dB at 1 kHz. Stable operation is
achieved with an output capacitor as low as 0.22 mF; a
capacitor of any type may be used. (However, the larger the
output capacitor is, the better the overall characteristics will
be.)
The TK717xxS is available in a very small SOT23-5 surface
mount package.
TK717xxS
DESCRIPTION
TK717xxS is a low dropout linear regulator with a built-in
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. In the OFF
state, the output impedance becomes very low, quickly
discharging the output capacitor. An external capacitor can
be connected to the noise bypass pin to lower the output
noise level to 30 ~ 50 mVRMS. An internal PNP pass transistor
is included to achieve a low dropout voltage of 103 mV at
100 mA load current. The TK717xx has an exceptionally
ORDERING INFORMATION
TK717 S L
Voltage Code
Package Code
Tape/Reel Code
Operating Temp. Range
VOLTAGE CODE
15 = 1.5 V 24 = 2.4 V
16 = 1.6 V 25 = 2.5 V
17 = 1.7 V 26 = 2.6 V
18 = 1.8 V 27 = 2.7 V
19 = 1.9 V 28 = 2.8 V
20 = 2.0 V 29 = 2.9 V
21 = 2.1 V 30 = 3.0 V
22 = 2.2 V 31 = 3.1 V
23 = 2.3 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
TAPE/REEL CODE
L: Tape Left
OPERATING TEMP. RANGE
C: -30 ~ 80°C
PACKAGE CODE
S: SOT23-5
VIN
GND01S
CONTROL
VOUT
NOISE
BYPASS
BLOCK DIAGRAM
VIN
CONTROL
CONTROL CIRCUIT
CONSTANT
CURRENT
SOURCE
BANDGAP
REFERENCE
THERMAL &
OVER CURRENT
PROTECTION
VOUT
+
-
AUTO
DISCHARGE
CIRCUIT
GND
NOISE
BYPASS
October 2001 TOKO, Inc.
Page 1




TK71740S pdf, 반도체, 판매, 대치품
TK717xxS
TK717xxSCL ELECTRICAL CHARACTERISTICS TABLE 1
Test Conditions: VIN = VOUT(TYP) + 1 V, IOUT = 5 mA, TA = 25 °C, unless otherwise specified.
OUTPUT VOLTAGE
VOLTAGE CODE
1.5 V
15
VOUT MIN
1.450 V
VOUT MAX
1.550 V
TEST
VOLTAGE
2.5 V
OUTPUT
VOLTAGE
3.3 V
VOLTAGE
CODE
33
VOUT MIN
3.250 V
VOUT
MAX
3.350 V
TEST
VOLTAGE
4.3 V
1.6 V
16 1.550 V 1.650 V 2.6V
3.4 V
34 3.349 V 3.451 V 4.4 V
1.7 V
17 1.650 V 1.750 V 2.7 V
3.5 V
35 3.447 V 3.553 V 4.5 V
1.8 V
18 1.750 V 1.850 V 2.8 V
3.6 V
36 3.546 V 3.654 V 4.6 V
1.9 V
19 1.850 V 1.950 V 2.9 V
3.7 V
37 3.644 V 3.756 V 4.7 V
2.0 V
20 1.950 V 2.050 V 3.0 V
3.8 V
38 3.743 V 3.857 V 4.8 V
2.1 V
21 2.050 V 2.150 V 3.1 V
3.9 V
39 3.841 V 3.959 V 4.9 V
2.2 V
22 2.150 V 2.250 V 3.2 V
4.0 V
40 3.940 V 4.060 V 5.0 V
2.3 V
23 2.250 V 2.350 V 3.3 V
4.1 V
41 4.038 V 4.162 V 5.1 V
2.4 V
24 2.350 V 2.450 V 3.4 V
4.2 V
42 4.137 V 4.263 V 5.2 V
2.5 V
25 2.450 V 2.550 V 3.5 V
4.3 V
43 4.235 V 4.365 V 5.3 V
2.6 V
26 2.550 V 2.650 V 3.6 V
4.4 V
44 4.334 V 4.466 V 5.4 V
2.7 V
27 2.650 V 2.750 V 3.7 V
4.5 V
45 4.432 V 4.568 V 5.5 V
2.8 V
28 2.750 V 2.850 V 3.8 V
4.6 V
46 4.531 V 4.669 V 5.6 V
2.9 V
29 2.850 V 2.950 V 3.9 V
4.7 V
47 4.629 V 4.771 V 5.7 V
3.0 V
30 2.950 V 3.050 V 4.0 V
4.8 V
48 4.728 V 4.872 V 5.8 V
3.1 V
31 3.050 V 3.150 V 4.1 V
4.9 V
49 4.826 V 4.974 V 5.9 V
3.2 V
32 3.150 V 3.250 V 4.2 V
5.0 V
50 4.925 V 5.075 V 6.0 V
The output voltage table indicates the standard value when manufactured.
Page 4
October 2001 TOKO, Inc.

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TK71740S 전자부품, 판매, 대치품
TK717xxS
DEFINITION AND EXPLANATION OF TECHNICAL TERMS
OUTPUT VOLTAGE (VOUT)
The output voltage is specified with VIN = (VOUT(TYP) + 1 V)
and IOUT = 5 mA.
mA. Ripple rejection is the ratio of the ripple content of the
output vs. the input and is expressed in dB.
STANDBY CURRENT (ISTBY)
MAXIMUM OUTPUT CURRENT (IOUT(MAX))
Theratedoutputcurrentisspecifiedundertheconditionwherethe
output voltage drops 0.3 V below the value specified with IOUT =
5 mA. This input voltage is set to VOUT(TYP) +1 V, and the current
is pulsed to minimize temperature effect.
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 tempera-
ture.
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 + 1 V to VIN = VOUT + 6 V.
Standby current is the current which flows into the regulator
when the output is turned off by the control function.
OVER CURRENT SENSOR
The overcurrent sensor protects the device if the output is
shorted to ground.
THERMAL SENSOR
The thermal sensor protects the device if the junction
temperature exceeds the safe value (Tj = 150 °C). This
temperature rise can be caused by extreme heat, excessive
power dissipation caused by large output voltage drops, or
excessive output current. The regulator will shut off when
the temperature exceeds the safe value. As the junction
temperature decreases, 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.
REVERSE VOLTAGE PROTECTION
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 5 mA
to 100 mA and 5 mA to 200 mA.
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. Toko’s regulators do not need an inherent diode
connected between the input and output.
QUIESCENT CURRENT (IQ)
The quiescent current is the current which flows through the
ground terminal under no load conditions (IOUT = 0 mA).
RIPPLE REJECTION RATIO (RR)
VIN
TK717xxS
VOUT
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, 400 Hz and 1 kHz superimposed
on the input voltage, where VIN = VOUT + 1.5 V. The output
decoupling capacitor is set to 1.0 µF, the noise bypass
capacitor is set to 0.01 µF, and the load current is set to 10
GND
October 2001 TOKO, Inc.
Page 7

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부품번호상세설명 및 기능제조사
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LOW DROPOUT VOLTAGE REGULATOR

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