TK717xxS
LOW DROPOUT VOLTAGE REGULATOR
FEATURES
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Very Good Stability (CL = 0.22
mF
is Stable For
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Any Type Capacitor withV
OUT
³
1.8 V)
Built-in Shunt Circuit of Output to GND. The Stored
Energy of the Output Capacitor is Discharged
Quickly
Wide Operating Voltage Range (1.8 V ~ 14 V)
Very Low Dropout Voltage (V
DROP
= 103 mV at
100 mA)
Peak Output Current is 370 mA (0.3 V DROP Point)
Very Low Quiescent Current (I
Q
= 72 uA at I
OUT
= 0 mA)
Good Ripple Rejection Ratio (80 dB at 1 kHz)
High Precision Output Voltage (± 1.5 % or ± 50 mV)
Suitable for Very Low Noise Applications
Built-in Active High On/Off Control (0.1
mA
Max
Standby Current)
Built-in Short Circuit Protection
Built-in Thermal Shutdown
Very Small Surface Mount Package (SOT23-5)
APPLICATIONS
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Battery Powered Systems
Measurement Systems
Mobile Communications Systems
Cordless Phone, PHS, GSM, CDMA
Industrial Equipment
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
VIN
GND
VOUT
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
mV
RMS
. 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
01 S
CONTROL
NOISE
BYPASS
ORDERING INFORMATION
BLOCK DIAGRAM
TK717
Voltage Code
Package Code
S L
VIN
VOUT
CONTROL CIRCUIT
CONTROL
CONSTANT
CURRENT
SOURCE
-
+
Tape/Reel Code
Operating Temp. Range
VOLTAGE CODE
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
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 =
43 =
44 =
45 =
46 =
47 =
48 =
49 =
50 =
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
TAPE/REEL CODE
L: Tape Left
OPERATING TEMP. RANGE
C: -30 ~ 80°C
PACKAGE CODE
S: SOT23-5
BANDGAP
REFERENCE
THERMAL &
OVER CURRENT
PROTECTION
AUTO
DISCHARGE
CIRCUIT
GND
NOISE
BYPASS
October 2001 TOKO, Inc.
Page 1
TK717xxS
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ............................................... -0.4 to16 V
Power Dissipation (Note 1) ................................. 500 mW
Reverse Bias Voltage ..................................... -0.4 to 6 V
Operating Voltage Range ............................... 1.8 to 14 V
Storage Temperature Range ..................... -55 to +150 °C
Test conditions: T
A
= 25 °C, unless otherwise specified.
Operating Temperature Range ..................... -30 to +80 °C
Noise Bypass Pin Voltage .............................. -0.4 to 5 V
Control Pin Voltage ....................................... -0.4 to 16 V
Short Circuit Current ............................................ 410 mA
TK717xxSCL ELECTRICAL CHARACTERISTICS
SYMBOL
V
OUT
Line Reg
PARAMETER
Output Voltage
Line Regulation
TEST CONDITIONS
MIN
TYP
MAX
UNITS
See Table 1
V
IN
= V
OUT(TYP)
+ 1 V to V
OUT(TYP)
+ 6 V,
D
V = 5 V
0.3
8
27
65
103
163
163
280
370
250
72
0.0
0.8
13
23
25
27
29
38
41
44
5
24
61
130
200
300
300
mV
mV
mV
mV
mV
mV
mV
mA
mA
Load Reg Load Regulation
5 mA < I
OUT
< 100 mA, Note 2
5 mA < I
OUT
< 200 mA, Note 2
V
DROP
Dropout Voltage
(Note 5)
I
OUT
= 50 mA
I
OUT
= 100 mA
I
OUT
= 200 mA (2.4 V
£
V
OUT
)
I
OUT
= 180 mA (2.1 V
£
V
OUT
< 2.4 V)
I
OUT (MAX)
Maximum Output Current
When V
OUT
Down 0.3 V, Note 2
1.8 V
£
V
IN
£
2.1 V, Reference Value
I
Q
I
STBY
I
GND
I
dis
Quiescent Current
Standby Current
GND Pin Current
Discharge Current
I
OUT
= 0 mA Excluding I
CONT
V
CC
= 8 V, V
CONT
£
0.15 V, Off Mode
I
OUT
= 50 mA
V
REV
= 2 V, Off Mode (71720)
V
REV
= 3 V, Off Mode (71730)
V
REV
= 4 V, Off Mode (71740)
V
REV
= 5 V, Off Mode (71750)
110
0.1
1.5
mA
mA
mA
mA
mA
mA
mA
Page 2
October 2001 TOKO, Inc.
TK717xxS
TK717xxSCL ELECTRICAL CHARACTERISTICS (CONT.)
Test conditions: T
A
= 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
CONTROL TERMINAL SPECIFICATIONS (See Note 3 and 4)
I
CONT
V
CONT(ON)
V
CONT(OFF)
V
REF
DV
OUT
/DT
V
NO
Control Current
Control Voltage ON
Control Voltage OFF
Noise Bypass Terminal
Voltage
Temperature Coefficient
Output Noise
Reference Value
Reference Value
V
OUT
= 1.8 V On State
On Mode
Off Mode
1.26
Typ = 25 ppm/°C
0.20
m
V/
Ö
Hz Typical at 1kHz
1.6
0.6
0.86
2.5
µA
V
V
V
Note 1: Power dissipation is 150 mW in free air. Power dissipation is 500 mW when mounted as recommended. Derate at 4.0 mW/°C for operation
above 25°C.
Note 2: This value depends on the output voltage. This is a reference value for a 3 V output device.
Note 3: The input current decreases to the pA level by connecting the control terminal to GND.
Note 4: The pull-down resistor is not built-in.
Note 5: The minimum operating voltage for V
IN
can be 1.8 V. Also, the minimum voltage required for V
IN
is V
IN
= V
DROP
+ V
OUT
. As a result, operating
at V
OUT
£
2.0 V at the mimimum input operating voltage is not preferred.
General Note: The operation of -30 °C to 80 °C is guaranteed by design (verified by sample inspection).
General Note: Exceeding the “Absolute Maximum Rating “may damage the device.
General Note: Output noise is 0.20
mV/ ÖHz
typical at 1 kHz: BW 400 to 30 kHz and 30 ~ 60
m
Vrms.
General Note: Connecting a capacitor to the noise by pass pin will decrease the output noise voltage.
October 2001 TOKO, Inc.
Page 3
TK717xxS
TK717xxSCL ELECTRICAL CHARACTERISTICS TABLE 1
Test Conditions: V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 5 mA, TA = 25 °C, unless otherwise specified.
OUTPUT VOLTAGE
VOLTAGE
CODE
V
OUT
MIN
1.5 V
1.6 V
1.7 V
1.8 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
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1.450 V
1.550 V
1.650 V
1.750 V
1.850 V
1.950 V
2.050 V
2.150 V
2.250 V
2.350 V
2.450 V
2.550 V
2.650 V
2.750 V
2.850 V
2.950 V
3.050 V
3.150 V
V
OUT
MAX
1.550 V
1.650 V
1.750 V
1.850 V
1.950 V
2.050 V
2.150 V
2.250 V
2.350 V
2.450 V
2.550 V
2.650 V
2.750 V
2.850 V
2.950 V
3.050 V
3.150 V
3.250 V
TEST
VOLTAGE
2.5 V
2.6V
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
OUTPUT
VOLTAGE
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
VOLTAGE
CODE
V
OUT
MIN
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
3.250 V
3.349 V
3.447 V
3.546 V
3.644 V
3.743 V
3.841 V
3.940 V
4.038 V
4.137 V
4.235 V
4.334 V
4.432 V
4.531 V
4.629 V
4.728 V
4.826 V
4.925 V
V
OUT
MAX
3.350 V
3.451 V
3.553 V
3.654 V
3.756 V
3.857 V
3.959 V
4.060 V
4.162 V
4.263 V
4.365 V
4.466 V
4.568 V
4.669 V
4.771 V
4.872 V
4.974 V
5.075 V
TEST
VOLTAGE
4.3 V
4.4 V
4.5 V
4.6 V
4.7 V
4.8 V
4.9 V
5.0 V
5.1 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
The output voltage table indicates the standard value when manufactured.
Page 4
October 2001 TOKO, Inc.
TK717xxS
TEST CIRCUIT
VIN
IIN
VOUT
CL = 0.22
µF
GND
IOUT
A
VIN
CIN = 0.22
µF
V
A
VCONT
V
ICONT
CN = 0.001
µF
On/Off CONT
Noise Bypass (VREF)
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Performance
TK71730S NOISE vs. CN
300
250
♠
CL = CERAMIC
♦
♦
CL
CL
CL
CL
CL
= 0.2
µF
= 0.4
µF
= 1.0
µF
= 2.2
µF
= 10
µF
NOISE vs VOUT
70
70
NOISE (µVrms)
IOUT = 30 mA
CN = 0.01µF
CL = 1.0
µF
(TANTALUM)
NOISE vs. IOUT
65
60
♦
♠
CN = 0.01
µF
CL
CL
CL
CL
CL
= 0.22
µF
= 0.47
µF
= 1.0
µF
= 2.2
µF
= 10
µF
NOISE (µVrms)
NOISE (µVrms)
200
150
100
50
0
0
CL = TANTALUM
♠
60
50
40
30
20
10
55
50
45
40
♦
35
30
0
25
♠
CL = TANTALUM
IOUT = 30 mA
BPF = 400 Hz ~ 80 kHz
BPF = 400 Hz ~ 80 kHz
10
100 1000 10000 100000
CN (pF)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VOUT (V)
50 75 100 125 150 175 200
IOUT (mA)
NOISE vs. IOUT
70
65
60
NOISE (µVrms)
NOISE vs. FREQUENCY
10
TK71730S
CIN = 10
µF
CL = 0.22
µF
(CERAMIC)
IOUT = 10 mA
CN = 0.01
µF
♦
♠
CL
CL
CL
CL
CL
= 0.22
µF
= 0.47
µF
= 1.0
µF
= 2.2
µF
= 10
µF
45
40
35
30
0
25
♦
♠
CL = CERAMIC
µ
V/
50
Hz
55
1
CN = 0.01
µF
0.1
CN = 0.10
µF
For better noise reduction it is
more effective to increase C
N
without increasing CL.
The recommended C
N
capaci-
tance is 6800 pF or 0.01
mF.
As the output voltage increases,
the noise will also increase.
0.01
50 75 100 125 150 175 200
IOUT (mA)
0.01
0.1
1
10
FREQUENCY (kHz)
100
October 2001 TOKO, Inc.
Page 5
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