TK71723S Datasheet PDF - TOKO
| Part Number | TK71723S | |
| Description | LOW DROPOUT VOLTAGE REGULATOR | |
| Manufacturers | TOKO | |
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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
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TEST CIRCUIT
A
VIN
IIN
CIN = 0.22 µF
VIN
GND
VCONT V
A
ICONT
On/Off CONT
VOUT
CL = 0.22 µF
V
IOUT
CN = 0.001 µF
Noise Bypass (VREF)
TK717xxS
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Performance
TK71730S NOISE vs. CN
300
CL = CERAMIC
250 ♠
200
♦ CL = 0.2 µF
CL = 0.4 µF
♦
CL = 1.0 µF
♠ CL = 2.2 µF
CL = 10 µF
150
100
CL = TANTALUM
50
0
0
IOUT = 30 mA
BPF = 400 Hz ~ 80 kHz
10 100 1000 10000 100000
CN (pF)
NOISE vs VOUT
70 IOUT = 30 mA
CN = 0.01µF
60 CL = 1.0 µF (TANTALUM)
50
40
30
20 BPF = 400 Hz ~ 80 kHz
10
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOUT (V)
NOISE vs. IOUT
70 CN = 0.01 µF
65
60
55
50
45
40 ♦
♦ CL = 0.22 µF
CL = 0.47 µF
CL = 1.0 µF
♠ CL = 2.2 µF
CL = 10 µF
CL = TANTALUM
35 ♠
30
0 25 50 75 100 125 150 175 200
IOUT (mA)
70
65
60
55
50
45
♦
40
35
NOISE vs. IOUT
CN = 0.01 µF
♦ CL = 0.22 µF
CL = 0.47 µF
CL = 1.0 µF
♠ CL = 2.2 µF
CL = 10 µF
CL = CERAMIC
♠
30
0 25 50 75 100 125 150 175 200
IOUT (mA)
October 2001 TOKO, Inc.
NOISE vs. FREQUENCY
10
TK71730S
CIN = 10 µF
CL = 0.22 µF (CERAMIC)
IOUT = 10 mA
1
CN = 0.01 µF
0.1 CN = 0.10 µF
0.01
0.01
0.1 1
10
FREQUENCY (kHz)
100
For better noise reduction it is
more effective to increase CN
without increasing CL.
The recommended CN capaci-
tance is 6800 pF or 0.01 mF.
As the output voltage increases,
the noise will also increase.
Page 5
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| Information | Total 13 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TK71723S.PDF Datasheet ] | |
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