GC3-H006F Page 1
APPLICATION MANUAL
LDO REGULATOR WITH ON/OFF SWITCH
TK717xxS
CONTENTS
1 . DESCRIPTION 2
2 . FEATURES 2
3 . APPLICATIONS 2
4 . PIN CONFIGURATION 2
5 . BLOCK DIAGRAM 2
6 . ORDERING INFORMATION 3
7 . ABSOLUTE MAXIMUM RATINGS (BOTH C
AND I RANK IN COMMON) 4
8 . ELECTRICAL CHARACTERISTICS 5
9 . TEST CIRCUIT 11
10 . TYPICAL CHARACTERISTICS 12
11 . APPLICATIONS INFORMATION 20
12 . PACKAGE OUTLINE 24
13 . NOTES 25
14 . OFFICES 25
TK717xxS
GC3-H006F Page 2
LDO REGULATOR WITH ON/OFF SWITCH
TK717xxS
1. DESCRIPTION
The TK717xxS is an integrated circuit with a silicon
monolithic bipolar structure. The regulator is of the low
saturation voltage output type with very little quiescent
current (72mA). The PNP power transistor is built-in.
The I/O voltage difference is 163 mV (typical) when a
current of 200mA is supplied to the system. Because of
the low voltage drop, the voltage source can be
effectively used; this makes it very suitable for battery
powered equipment.
The on/off function is built into the IC. The current
during standby mode becomes very small (pA level).
In addition, the output short-circuit function works at off
times. It is a unique characteristic by which the residual
charge of the output side capacitor is rapidly discharged.
The output voltage is available from 1.5 to 10.0V in 0.1V
steps. The output voltage is trimmed with high accuracy.
This allows the optimum voltage to be selected for the
equipment.
The over current sensor circuit and the reverse-bias
protection circuit are built-in.
It is a very rugged design because the ESD protection is
high. Therefore, the TK717xxS can be used with
confidence. When mounted on the PCB, the power
dissipation rating becomes about 500mW, even though
the package is very small.
The TK717xxS features very high stability in both DC
and AC. The capacitor on the output side provides
stable operation with 0.22mF with 2.0V≤Vout. A
capacitor of any type can be used; however, the larger
this capacitor is, the better the overall characteristics are.
2. FEATURES
Built-in shunt circuit of output to GND
High Precision output voltage(±50mV or ±1.5％)
Good ripple rejection ratio(80dB at 1kHz)
Built-in short circuit protection and thermal shutdown
Built-in on/off control (High On)
Built-in reverse bias over current protection
3. APPLICATIONS
Any Electronic Equipment
Battery Powered Systems
Mobile Communication
4. PIN CONFIGURATION
1
3
2
5
4
Vin Vout
Np
GND
Vcont
Top View
5. BLOCK DIAGRAM
Bandgap
Reference
Control
Circuit
Over Heat &
Over Current
Protection
Auto
Discharge
Circuit
Vin
GND
Vout
NpVcont
Constant
Current
Source
700kW
TK717xxS
GC3-H006F Page 3
6. ORDERING INFORMATION
L
S
T K 7 1 7
Voltage Code
Package Code
S : SOT23-5
Tape / Reel Code
ex. 3.3V : 33
5.0V : 50
Rank Code
C : C Rank
I : I Rank
ORDERING INFORMATION
V OUT V CODE
V OUT V CODE
V OUT V CODE
V OUT V CODE
1.5 v 15 2.5 v 25 3.5 v 35 4.5 v 45
1.6 16 2.6 26 3.6 36 4.6 46
1.7 17 2.7 27 3.7 37 4.7 47
1.8 18 2.8 28 3.8 38 4.8 48
1.9 19 2.9 29 3.9 39 4.9 49
2.0 20 3.0 30 4.0 40 5.0 50
2.1 21 3.1 31 4.1 41
2.2 22 3.2 32 4.2 42
2.3 23 3.3 33 4.3 43
2.4 24 3.4 34 4.4 44
TK717xxS
GC3-H006F Page 4
7. ABSOLUTE MAXIMUM RATINGS (BOTH C AND I RANK IN COMMON)
Ta=25°C
Parameter Symbol Rating Units Conditions
Absolute Maximum Ratings
Supply Voltage VccMAX -0.4 ~ 16 V
-0.4 ~ 6 V Vout £ 2.0V
Reverse Bias VrevMAX -0.4 ~ 12 V 2.1V £ Vout
Np pin Voltage VnpMAX -0.4 ~ 5 V
Control pin Voltage VcontMAX
-0.4 ~ 16 V
Storage Temperature Range Tstg -55 ~ 150 °C
Power Dissipation PD 500 when mounted on a
PCB mW Internal Limited Tj=150°C *
Operating Condition
Operating Temperature Range TOP -40 ~ 85 °C
2.1 ~ 14 V TOP =-40 ~ 85°C
Operating Voltage Range VOP 1.8 ~ 14 V TOP =-30 ~ 80°C
Short Circuit Current Ishort 410 mA
* PD must be decreased at rate of 4.0mW/°C for operation above 25°C.
The maximum ratings are the absolute limitation values with the possibility of the IC being damaged.
If the operation exceeds any of these standards, quality cannot be guaranteed.
.
TK717xxS
GC3-H006F Page 5
8. ELECTRICAL CHARACTERISTICS
8-1. Electrical Characteristics of the C rank
The operation between -40 ~ 85°C is guaranteed by design. The parameter with limit value will be guaranteed with
test when manufacturing or SQC (Statistical Quality Control) technique.
Vin=VoutTYP+1V, Vcont=1.8V, Ta=25°C
Value
Parameter Symbol
MIN TYP MAX
Units
Conditions
Output Voltage Vout Refer to TABLE 1 V Iout = 5mA
Line Regulation LinReg - 0.0 5.0 mV DVin = 5V
Load Regulation LoaReg Refer to TABLE 1 mV Iout = 5mA ~ 100mA
Refer to TABLE 1 mV Iout = 5mA ~ 200mA
Dropout Voltage *1 Vdrop - 65 130 mV Iout = 50mA
- 103 200 mV Iout = 100mA
- 163 300 mV Iout = 180mA (2.1V £ Vout £ 2.3V)
- 163 300 mV Iout = 200mA (2.4V £ Vout)
Maximum Output Current *2
IoutMAX 280 370 - mA When Vout down 0.3V
Supply Current Icc - 72 110 mA Iout = 0mA
Standby Current Istandby - 0.0 0.1 mA Vcont = 0V
Quiescent Current Iq - 0.8 1.5 mA Iout = 50mA
Discharge Current Idis Refer to TABLE 1 mA Vrev=VoutTYP
Control Terminal
Control Current Icont - 0.86 2.5 mA Vcont = 1.8V
Control Voltage Vcont 1.8 - - V Vout ON state
- - 0.35 V Vout OFF state
TOP=-40~85°C
1.6 - - V Vout ON state
- - 0.6 V Vout OFF state
TOP=-30~80°C
*1: For Vout £ 2.0V , no regulations.
*2: The maximum output current is limited by power dissipation.
TK717xxS
GC3-H006F Page 6
TABLE 1. Output Voltage, Load Regulation, Discharge Current
Load Regulation Discharge
Current
Output Voltage
Iout = 100mA Iout = 200mA Vrev =VoutTYP
MIN TYP MAX TYP MAX TYP MAX MIN TYP
Part Number
V V V mV mV mV mV mA mA
VoutTYP=1.3V ~ 2.0V
TK71713SC 1.250 1.300 1.350 7 16 15 38 10 15
TK71714SC 1.350 1.400 1.450 7 17 16 38 11 18
TK71715SC 1.450 1.500 1.550 7 17 16 39 13 20
TK71716SC 1.550 1.600 1.650 7 17 16 40 15 22
TK71717SC 1.650 1.700 1.750 7 17 17 40 16 24
TK71718SC 1.750 1.800 1.850 7 17 17 41 17 26
TK71719SC 1.850 1.900 1.950 7 18 17 42 18 28
TK71720SC 1.950 2.000 2.050 7 18 18 43 19 29
VoutTYP=2.1V ~ 3.0V
TK71721SC 2.050 2.100 2.150 7 21 18 50 20 31
TK71722SC 2.150 2.200 2.250 7 21 18 51 21 32
TK71723SC 2.250 2.300 2.350 7 21 18 52 22 33
TK71724SC 2.350 2.400 2.450 8 22 19 53 22 34
TK71725SC 2.450 2.500 2.550 8 22 19 54 23 35
TK71726SC 2.550 2.600 2.650 8 22 19 55 24 36
TK71727SC 2.650 2.700 2.750 8 22 20 55 24 36
TK71728SC 2.750 2.800 2.850 8 23 20 56 24 37
TK71729SC 2.850 2.900 2.950 8 23 20 57 25 38
TK71730SC 2.950 3.000 3.050 8 23 21 58 25 38
VoutTYP=3.1V ~ 4.0V
TK71731SC 3.050 3.100 3.150 8 23 21 59 25 39
TK71732SC 3.150 3.200 3.250 8 23 21 60 26 39
TK71733SC 3.250 3.300 3.350 8 24 21 60 26 39
TK71734SC 3.349 3.400 3.451 8 24 22 61 26 40
TK71735SC 3.447 3.500 3.553 8 24 22 62 26 40
TK71736SC 3.546 3.600 3.654 9 24 22 63 27 40
TK71737SC 3.644 3.700 3.756 9 25 23 64 27 41
TK71738SC 3.743 3.800 3.857 9 25 23 65 27 41
TK71739SC 3.841 3.900 3.959 9 25 23 66 27 41
TK71740SC 3.940 4.000 4.060 9 25 24 66 27 41
TK717xxS
GC3-H006F Page 7
TABLE 1. Output Voltage, Load Regulation, Discharge Current (continue)
Load Regulation Discharge
Current
Output Voltage
Iout = 100mA Iout = 200mA Vrev =VoutTYP
MIN TYP MAX TYP MAX TYP MAX MIN TYP
Part Number
V V V mV mV mV mV mA mA
VoutTYP=4.1V ~ 5.0V
TK71741SC 4.038 4.100 4.162 9 26 24 67 28 42
TK71742SC 4.137 4.200 4.263 9 26 24 68 28 42
TK71743SC 4.235 4.300 4.365 9 26 24 69 28 42
TK71744SC 4.334 4.400 4.466 9 26 25 70 28 42
TK71745SC 4.432 4.500 4.568 9 27 25 71 28 43
TK71746SC 4.531 4.600 4.669 9 27 25 71 28 43
TK71747SC 4.629 4.700 4.771 9 27 26 72 29 43
TK71748SC 4.728 4.800 4.872 10 27 26 73 29 43
TK71749SC 4.826 4.900 4.974 10 27 26 74 29 44
TK71750SC 4.925 5.000 5.075 10 28 27 75 29 44
VoutTYP=5.3V, 5.4V
TK71753SC 5.220 5.300 5.380 10 28 27 77 36 55
TK71754SC 5.319 5.400 5.481 10 29 28 78 36 55
TK717xxS
GC3-H006F Page 8
8-2. Electrical Characteristics of the I rank
The operation between -40 ~ 85°C is guaranteed by design. The parameter with limit value will be guaranteed with
test when manufacturing or SQC (Statistical Quality Control) technique.
Vin=VoutTYP+1V,Vcont=1.8V,Ta=-40 ~ 85°C
Value
Parameter Symbol
MIN TYP MAX Units
Conditions
Output Voltage Vout Refer to TABLE 2 V Iout = 5mA
Line Regulation LinReg - 0.0 8.0 mV DVin = 5V
Load Regulation LoaReg Refer to TABLE 2 mV Iout = 5mA ~ 100mA
Refer to TABLE 2 mV Iout = 5mA ~ 200mA
Dropout Voltage *1 Vdrop - 65 180 mV Iout = 50mA
- 103 270 mV Iout = 100mA
- 163 350 mV Iout = 180mA (2.2V £ Vout £ 2.3V)
- 163 350 mV Iout = 200mA (2.4V £ Vout)
Maximum Output Current *2
IoutMAX 250 370 - mA When Vout down 0.3V
Supply Current Icc - 72 120 mA Iout = 0mA
Standby Current Istandby - 0.0 0.5 mA Vcont = 0V
Quiescent Current Iq - 0.8 1.8 mA Iout = 50mA
Discharge Current Idis Refer to TABLE 2 mA Vrev=VoutTYP
Control Terminal
Control Current Icont - 0.86 3.0 mA Vcont = 1.8V
Control Voltage Vcont 1.8 - - V Vout ON state
- - 0.35 V Vout OFF state
*1: For Vout £ 2.1V , no regulations.
*2: The maximum output current is limited by power dissipation.
TK717xxS
GC3-H006F Page 9
TABLE 2. Output Voltage, Load Regulation, Discharge Current
Load Regulation Discharge
Current
Output Voltage
Iout = 100mA Iout = 200mA Vrev =VoutTYP
MIN TYP MAX TYP MAX TYP MAX MIN TYP
Part Number
V V V mV mV mV mV mA mA
VoutTYP=1.3V ~ 2.0V
TK71713SI 1.220 1.300 1.380 7 26 15 49 7 15
TK71714SI 1.320 1.400 1.480 7 26 16 50 8 18
TK71715SI 1.420 1.500 1.580 7 26 16 52 9 20
TK71716SI 1.520 1.600 1.680 7 27 16 53 10 22
TK71717SI 1.620 1.700 1.780 7 27 17 54 11 24
TK71718SI 1.720 1.800 1.880 7 27 17 56 12 26
TK71719SI 1.820 1.900 1.980 7 28 17 57 13 28
TK71720SI 1.920 2.000 2.080 7 28 18 58 13 29
VoutTYP=2.1V ~ 3.0V
TK71721SI 2.020 2.100 2.180 7 28 18 60 14 31
TK71722SI 2.120 2.200 2.280 7 29 18 61 15 32
TK71723SI 2.220 2.300 2.380 7 29 18 63 15 33
TK71724SI 2.320 2.400 2.480 8 29 19 64 16 34
TK71725SI 2.420 2.500 2.580 8 30 19 65 16 35
TK71726SI 2.520 2.600 2.680 8 30 19 67 16 36
TK71727SI 2.620 2.700 2.780 8 30 20 68 17 36
TK71728SI 2.720 2.800 2.880 8 31 20 69 17 37
TK71729SI 2.820 2.900 2.980 8 31 20 71 17 38
TK71730SI 2.920 3.000 3.080 8 31 21 72 17 38
VoutTYP=3.1V ~ 4.0V
TK71731SI 3.020 3.100 3.180 8 32 21 74 18 39
TK71732SI 3.120 3.200 3.280 8 32 21 75 18 39
TK71733SI 3.217 3.300 3.383 8 32 21 76 18 39
TK71734SI 3.315 3.400 3.485 8 33 22 78 18 40
TK71735SI 3.412 3.500 3.588 8 33 22 79 18 40
TK71736SI 3.510 3.600 3.690 9 33 22 81 19 40
TK71737SI 3.607 3.700 3.793 9 34 23 82 19 41
TK71738SI 3.705 3.800 3.895 9 34 23 83 19 41
TK71739SI 3.802 3.900 3.998 9 34 23 85 19 41
TK71740SI 3.900 4.000 4.100 9 35 24 86 19 41
TK717xxS
GC3-H006F Page 10
TABLE 2. Output Voltage, Load Regulation, Discharge Current (continue)
Load Regulation Discharge
Current
Output Voltage
Iout = 100mA Iout = 200mA Vrev =VoutTYP
MIN TYP MAX TYP MAX TYP MAX MIN TYP
Part Number
V V V mV mV mV mV mA mA
VoutTYP=4.1V ~ 5.0V
TK71741SI 3.997 4.100 4.203 9 35 24 87 19 42
TK71742SI 4.095 4.200 4.305 9 35 24 89 19 42
TK71743SI 4.192 4.300 4.408 9 36 24 90 19 42
TK71744SI 4.290 4.400 4.510 9 36 25 92 20 42
TK71745SI 4.387 4.500 4.613 9 36 25 93 20 43
TK71746SI 4.485 4.600 4.715 9 37 25 94 20 43
TK71747SI 4.582 4.700 4.818 9 37 26 96 20 43
TK71748SI 4.680 4.800 4.920 10 38 26 97 20 43
TK71749SI 4.777 4.900 5.023 10 38 26 99 20 44
TK71750SI 4.875 5.000 5.125 10 38 27 100 20 44
VoutTYP=5.3V, 5.4V
TK71753SI 5.167 5.300 5.433 10 39 27 104 25 55
TK71754SI 5.265 5.400 5.535 10 40 28 105 25 55
TK717xxS
GC3-H006F Page 11
9. TEST CIRCUIT
Vin
Icont
Vcont
Icc Cin
CL
Cnp
Iout Vout
1.0uF
1.0uF
0.01uF
+
+
V
A
A
1
3
2
5
4
Vin Vout
Np
GND
Vcont
TK717xxS
GC3-H006F Page 12
10. TYPICAL CHARACTERISTICS
10-1. DC characteristics
Line regulation
-
35
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
0
5
10
15
20
V
in(V)
△Vout(mV)
Vo1.5V
Vo2.0V
Vo3.0V
Vo4.0V
Vo5.0V
Vin vs Vout
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
-100
0
100
200
300
△Vout(mV)
Iout=0～250mA
Iout=50mA Step
△Vin(mV)
Dropout voltage
-350
-300
-250
-200
-150
-100
-50
0
0
50
100
150
200
250
300
Iout (mA)
Vdrop(mV)
Vout(V)
Short Circuit current
0.0
1.0
2.0
3.0
4.0
5.0
0
100
200
300
400
500
Iout (mA)
Vop(V)
IoutMax(mA)
100
150
200
250
300
350
400
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
IoutMax at low Vop
TK71715
～
TK71724
Vo=2.0V
Vo=5.0V
△Vout(mV) Load regulation
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
0
50
100
150
200
Iout (mA)
Vo=3.0V
TK717xxS
GC3-H006F Page 13
Discharge current
0
10
20
30
40
50
60
0.0
1.0
2.0
3.0
4.0
5.0
Vout(V)
Idis(mA)
Standby current
1.0E
-
12
1.0E
-
11
1.0E
-
10
1.0E
-
09
1.0E
-
08
1.0E
-
07
1.0E
-
06
0
5
10
15
20
Vin(V)
Is(A)
Control current Io=0mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
0
1
2
3
4
Vcont(V
Icont(uA)
Icont
Vout
GND pin current
0
1
2
3
4
5
6
7
8
9
10
0
50
100
150
200
Iout (mA)
Ignd(mA)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
1
2
3
4
5
6
7
8
9
10
Vin(V)
Iin(mA)
Vo2.0V
Vo3.0V
Vo4.0V
Vo5.0V
Icc at Low voltage Io=0mA
TK717xxS
GC3-H006F Page 14
10-2. Temperature characteristics
Dropout voltage
0
50
100
150
200
250
300
-50
-25
0
25
50
75
100
Ta(℃)
Iout=30/50/100/150/200/250/280mA
Vdrop(mV)
Io=150mA
Io=100mA
Io=50mA
Io=200mA
Io=30mA
Io=280mA
Io=250mA
IoutMax(mA)
IoutMax
200
250
300
350
400
450
500
-50
-25
0
25
50
75
100
Ta(℃)
When Vout down 0.3V
Discharge current
0
5
10
15
20
25
30
35
40
45
50
-50
-25
0
25
50
75
100
Ta(℃)
Idis (mA)
Vrev=3.0V
Vrev=2.0V
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
-50 -25 0
25
50
75
100
Ta(℃)
Iout=30/60/100/150/200mA
GND pin current
Ignd(mA)
Io=150mA
Io=100mA
Io=60mA
Io=200mA
Io=30mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-50
-25
0
25
50
75
100
Ta(℃)
Vcont=1.8/2.0/3.0/4.0V
Control current
Icont(uA)
Vcont=
1.8
V
Vcont=
4.0V
0.6
0.8
1.0
1.2
1.4
1.6
-50
-25
0
25
50
75
100
Ta(℃)
Vcont(ONpoint)
Vcont(OFFpoint)
On/Off point voltage
Vcont(V)
TK717xxS
GC3-H006F Page 15
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
-
50
-
25
0
25
50
75
100
Ta(
℃
)
△Vout(mV) Vout=2.0V
-30
-25
-20
-15
-10
-5
0
5
10
15
20
-50
-25
0
25
50
75
100
Ta(℃)
△Vout(mV) Vout=3.0V
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
-
50
-
25
0
25
50
75
100
Ta(
℃
)
△Vout(mV) Vout=4.0V
-
30
-
25
-
20
-
15
-
10
-
5
0
5
10
15
20
-
50
-
25
0
25
50
75
100
Ta(
℃
)
△Vout(mV) Vout=5.0V
TK717xxS
GC3-H006F Page 16
10-3. Low voltage device
The operating initial voltage at normal temperature is about 1.6V. The voltage dependency of the output current at the
low input voltage is large. The operating initial voltage rises at low temperature.
(1.5V)
-100
0
100
200
300
△
Vin(mV)
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
△Vout(mV)
50mA Step
Iout=0mA,50mA,100mA,150mA,200mA
Iout=0mA
TK71715
S
Iout MAX
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
0
100
200
300
400
Iout(mA)
Vout(V)
Vin=1.8V
1.9V
Vin≧2.0V
-
200
-
180
-
160
-
140
-
120
-
100
-
80
-
60
-
40
-
20
0
20
(1.8V）
-100
0
100
200
300
△Vin(mV)
△Vout(mV)
Iout=0mA
50mA Step
Iout=0mA,50mA,100mA,150mA,200mA
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
-100
0
100
200
300
(2.0V） △Vin(mV)
△Vout(mV)
TK71720
S
Iout=0mA
50mA Step
Iout=0mA,50mA,100mA,150mA,200mA
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
0
100
200
300
400
Iout(mA)
Vout(V) Iout MAX
Vin≧2.1V
Vin=1.8V
1.9V
2.0V
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
0
100
200
300
400
Iout(mA)
Vout(V) Iout MAX
Vin=1.8V
1.9V
Vin≧2.0V
TK717xxS
GC3-H006F Page 17
10-4. Output noise
For better noise reduction, it is more effective to increase Cnp without increasing CL. The recommended Cnp
capacitance is 6800pF (682) or 0.01mF (103). As the output voltage increases, the noise will also increase.
Please increase this capacitance when low noise is demanded. The IC does not operate abnormally about 0.1 and 0.22mF.
MLCC : Multi Layer Ceramic Capacitor.
TANTAL : Tantalum Capacitor.
TK71730S Cnp vs Noise Iout=30mA BPF=400Hz～80kHz
30
35
40
45
50
55
60
65
70
0
25
50
75
100
125
150
175
200
Iout(mA)
Noise(uVrms)
CL=0.22uF
CL=0.47uF
CL=1.0uF
CL=2.2uF
CL=10uF
CL=
ﾀﾝﾀﾙ
Cnp=103
30
35
40
45
50
55
60
65
70
0
25
50
75
100
125
150
175
200
Iout(mA)
Noise(uVrms)
CL=0.22uF
CL=0.47u
F
CL=1.0uF
CL=2.2uF
CL=10uF
CL=
ｾﾗﾐｯｸ
Cnp=103
Cnp（ｐF）
0
50
100
150
200
250
300
1
10
100
1000
10000
100000
Noise（uVrms)
CL=ﾀﾝﾀﾙ
CL=ｾﾗﾐｯｸ
CL=0.22uF
CL=0.47uF
CL=1.0uF
CL=2.2uF
CL=10uF
Cnp vs Noise Vout vs Noise
10
20
30
40
50
60
70
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Vout(V)
Noise(uVrms)
Iout=30mA Cnp=103 CL=1.0uF
BPF=400Hz～80kHz
ﾀﾝﾀﾙ
ｾﾗﾐｯｸ
0.01
0.1
1
10
0.01
0.1
1
10
100
Frequency（kHz)
Noise(
m
V/√Hz)
CL=0.22
m
F（Ceramic)
Cnp=0.01mF
Cnp=0.10
m
F
TK71730S Cin=10μF Iout=10mA
TK717xxS
GC3-H006F Page 18
10-5. Ripple Rejection
The ripple rejection characteristic depends on the characteristic and the capacitance value of the capacitor connected to the output side. The
RR characteristic of 50kHz or more varies greatly with the capacitor on the output side and PCB pattern. If necessary, please confirm
stability while operating.
Vin=5.0V Vout=3.0V Iout=10mA VR=500mVp-p f=100～1MHz Cin=0 pF Cnp=0.01uF
Tantalum Capacitor
M.L.Ceramic Capacitor
Vin
500mVp
-
p
GND
Ripple Rejection（RR） vs Iout
0
25
50
75
100
125
150
175
200
Iout(mA)
R.R(dB)
Cnp=0.01μF
CL=0.22μF（Ceramic)
Vin=5.0V
Vripple=500mVp-p
Freq=1kHz
Freq=400Hz
低入力電圧時 RR
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
+0.2
+0.4
+0.6
+0.8
+1
Vin-Vout_Typ(V)
RR (dB)
Cnp:0.01μF
CL:0.22μF（Ceramic)
Iout:1,50,100,150,200mA
Freq:1kHz
Iout=1mA
Iout=200mA
Vin=Vout
TK717xxS
GC3-H006F Page 19
10-6. Transient
The stability level to a rapid power-supply voltage change and a load current change greatly depends on the value of the
output side capacitor and the noise bypass capacitor. Please refer to the figure below.
On/Off Speed
The on/off switching speed quickens when the Cnp and CL capacitance is reduced. However, the Load transient and
Line transient response deteriorate when the capacitance is small. In addition, the noise increases. We will recommend
CL=0.22mF and Cnp=1000pF to the demand of high-speed operation. Please increase each capacitance when low noise
is desired.
The on/off switch speed greatly depends on the value of the output side capacitor and the noise bypass capacitor. Please
refer to the figures below.
TK717xxS has a short circuit during off .
TK736xxAME has a Disconnect circuit during off.
TK111xxC is a normal regulator.
Please refer to the figure.
Vin
Vo
Vcc vs step response
500μS／Div
Vo+1
Cnp=0.001μF,CL=1.0μF
Io=30mA
10mV/DiV
Vo+2
0
200 600 400
m
S
TK7
36xxAME
TK111xxC
TK717xxS
on off Speed: CL=2.2mF、
Cnp=1000pF I Load=0mA
Vout
If the current is thrown into the load, the step response is settled fast.
Cnp=0.001mF 100mV/Div
Iout vs step response 2
2mS／Div
Iout
Vout
20mV/Div
10μF
4.7μF
2.2μF
CL=1μF
30mA
0mA
Iout vs step response 1
10μS／Div
0mA
30
mA
1
0
μ
F
CL=1μF
2.2μF
4.7μF
Iout
Vo
ut
on/off Speed 2: CL=2.2mＦ
0
800
m
S
200
400
600
ＩLoad =30mA
Cnp=0.01
m
Ｆ
100pF
0.001
m
F
0
10
50
20
60
30
70
40
m
S
I Load=30mA
CL=10
m
F
4.7
m
F
2.2
m
F
1
m
F
on/off Speed 1: Cnp=1000pF
TK717xxS
GC3-H006F Page 20
11. APPLICATIONS INFORMATION
11-1. Input / output capacitors
Linear regulators require input and output capacitors in order to maintain the regulator's loop stability. The equivalent
series resistance (ESR) of the output capacitor must be in the stable operation area. However, it is recommended to use
as large a value of capacitance as is practical. The output noise and the ripple noise decrease as the capacitance value
increases.
ESR values vary widely between ceramic and tantalum capacitors. However, tantalum capacitors are assumed to provide
more ESR damping resistance, which provides greater circuit stability. This implies that a higher level of circuit stability
can be obtained by using tantalum capacitors when compared to ceramic capacitors with similar values.
The input capacitor is necessary when the battery is discharged, the power supply impedance increases, or the line
distance to the power supply is long. This capacitor might be necessary on each individual IC even if two or more
regulator ICs are used. It is not possible to determine this indiscriminately. Please confirm the stability while mounted.
The IC provides stable operation with an output side capacitor of 0.22mF (Vout≧2.0V). If it is 0.1mF or more over the
full range of temperature, either a ceramic capacitor or tantalum capacitor can be used without considering ESR.
Please increase the output capacitor value when the load current is 0.5 mA or less. The stability of the regulator improves if a big output
side capacitor is used (the stable operation area extends.)
Low Voltage device: Please increase the output capacitor like 1.0mF when the load current is used by 0.5mA or less.
Please increase the output capacitor to 1.0mF when the load current is 0.5mA or less.
Bias Voltage and Temperature Characteristics of Ceramic Capacitor
Generally, a ceramic capacitor has both a temperature characteristic and a voltage characteristic. Please consider both characteristics
when selecting the part. The B curves are the recommended characteristics.
Vout
Cn=0.01
m
F
CL=0.22
m
F
～0.1mF
Cin=0.22
m
F
～0.1mF
The recommended values: Vout≧2.0V： CL≧0.22mF. Iout≧0.5mA
Vout≧1.5V： CL≧0.47μF. Iout≧0.5mA
The exception to this is at low output current.
0.01
0.1
1
10
100
0
50
100
150
Iout [mA]
ESR
[
Ω
]
Vout=4.6V-5.0V
Stable Area
CL=0.1uF
Vout=2.6V-3.5V
0.01
0.1
1
10
100
0
50
100
150
Iout [mA]
ESR [Ω
]
Stable Area
CL=0.1uF
150
Vout=1.5V-2.0V
0.01
0.1
1
10
100
0
50
100
ESR [
Ω]
Iout [mA]
All Stable
CL
≧
1.0
m
F
Stable Area
CL=0.1uF
Vout=2.1V-2.5V
0.01
0.1
1
10
100
0
50
100
150
Iout [mA]
All Stable
CL≧0.47mF
ESR
[
Ω
]
Stable Area
CL=0..1uF
150
0.01
0.1
1
10
100
0
50
100
Iout [mA]
ESR [
Ω]
Vout=3.6V-4.5V
Stable Area
CL=0.1uF
Stable operation area vs. voltage, current, and ESR（at 100kHz）
For evaluation KYOCERA CM05B104K10AB、CM05B224K10AB、CM105B104K16A、CM105B224K16A、CM21B225K10A
MURATA GRM36B104K10、GRM42B104K10 GRM39B104K25、GRM39B224K10、GRM39B105K6.3
%
Capacitance vs. Voltage
0
Bias voltage（V）
CAP
2 4
6
8
10
50
60
70
80
90
100
B Curve
F Curve
Capacitance vs. Temperature
%
60
50
80
90
100
70
CAP
-50
-25
0
25
50
75
100
Ta(℃)
B Curve
F Curve
TK717xxS
GC3-H006F Page 21
11-2. Board Layout
Material：Grass epoxy 20×20mm t=0.8mm
Pd=500 mW when mounted as recommended. Derate at 4.0 mW/°C for operation above 25°C. The thermal resistance is
(θja=250℃/W). The heat loss of A and B are done in total. The package loss is limited at the temperature that the
internal temperature sensor works (about 150℃). Therefore, the package loss is assumed to be an internal limitation.
There is no heat radiation characteristic of the package unit assumed because of the small size. Heat is carried away by
the device being installed on the PCB. This value changes by the material and the copper pattern etc. of the PCB.
Enduring losses of about 500mW becomes possible in a lot of applications operating at 25℃.
Determining the thermal resistance when mounted on a PCB.
The operating chip junction temperature is shown by Tj=θja×Pd+Ta.
Tj of IC is set to about 150℃.
Pd is a value when the overtemperature sensor is made to work.
Pd is easily obtained.
Mount the IC on the print circuit board. Short between the output pin and ground. after that, raise input voltage from 0V
to evaluated voltage (see*1) gradually. At shorted the output pin, the power dissipation PD can be expressed as Pd=Vin
´ Iin. The input current decreases gradually as the temperature of the chip becomes high. After a while, it reaches the
thermal equilibrium. Use this currrent value at the thermal equilibrium. In almost all the cases, it shows 500mW(SOT23-
5) or more.
*1 In the case that the power, Vin ´ Ishort (Short Circuit Current), becomes more than twice of the maximum rating of its power
dissipation in a moment, there is a possibility that the IC is destroyed before internal thermal protection works.
Pd is obtained by the normal temperature degrees. The current that can be used at the highest operating temperature is
obtained from the graph of the figure below.
Procedure (Do when PCB mounted).
1. Pd is obtained (Vin×Iin when the output side is short-circuited).
2. Pd is plotted on the horizontal line to 25℃.
3. Pd is connected with the point of 150℃ by the straight line
(bold face line).
4. A line is extended vertically above the point of the use temperature
in the design. For instance, 75℃ is assumed (broken line).
5. Extend the intersection of the derat
ing curve (fat solid line) and
(broken line) to the left and read the Pd value.
6.DPd÷(Vinmax－Vout)=Iout (at 75℃)
The maximum current that can be used at the highest operating temperature is:Iout≒ DPd÷(Vinmax－Vout).
When (Vinmax－Vout) is small, a lot of Iout is calculated. However, use that exceeds IoutMax cannot be done.
TK717xx
Vin
on／off
GND
N.pass
Vout
25 50 100
150
℃
0
P
d(m
Ｗ
)
(85)
500
-
4
.0mW/
℃
Free Air
0
Mounted
Ta (Ta=25℃）
150＝θja×Pd＋25
θja×Pd＝125
θja＝ (125/Pd) (℃/mＷ)
Pd(mＷ)
25
50
100 150℃
０ (75)
DPd
Pd 2
3
4
5
TK717xxS
GC3-H006F Page 22
11-3. On/Off control
It is recommended to turn the regulator Off when the circuit following the
regulator is non-operating. A design with a little electric power loss can be
implemented. We recommend the use of the on/off control of the regulator
without using a high side switch to provide an output from the regulator. A
highly accurate output voltage with low voltage drop is obtained.
Auto discharge circuit
This circuit operates during off. Please do not connect the battery, the
power supply, or other regulators to the output side. The charge of the
output side capacitor chiefly passes through the automatic output side
discharge circuit of the regulator during off.
For this function
It is not possible to operate by connecting two or more regulators with different voltages to the output side of the IC.
Because the control current is small, it is possible to control it directly by CMOS logic.
The PULLDOWN resistance is not built into the control terminal.
The noise and the ripple rejection characteristics depend on the capacitance on the Vref terminal. The ripple rejection
characteristic of the low frequency region improves by increasing the capacitance of Cnp. A standard value is
Cnp=0.01mF. Increase Cnp in a design with important output noise and ripple rejection requirements. The IC will not
be damaged if the capacitor value is increased.
TK717xxS
On/Off
Vout
Vin
REG
Vsat
On/Off Cont.
TK717xxS
GC3-H006F Page 23
11-4. Definition of term
¨ Output Voltage (Vout)
The output voltage is specified with Vin=(VoutTYP+1V)
and Iout=5mA.
¨ Maximum Output Current (Iout MAX)
The rated output current is specified under the condition
where the output voltage drops 0.3V the value specified
with Iout=5mA. The input voltage is set to VoutTYP+1V
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
temperature.
¨ Line Regulation (LinReg)
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=VoutTYP+1V to Vin=VoutTYP+6V. It is a pulse
measurement to minimize temperature effect.
¨ Load Regulation (LoaReg)
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=VoutTYP+1V. The load
regulation is specified output current step conditions of
5mA to 100mA and 5mA to 200mA.
¨ Ripple Rejection (R.R)
Ripple rejection is the ability of the regulator to attenuate
the ripple content of the input voltage at the output. It is
specified with 200mVrms, 1kHz super-imposed on the
input voltage, where Vin=Vout+1.5V. Ripple rejection is
the ratio of the ripple content of the output vs. input and is
expressed in dB.
¨Standby Current (Istandby)
Standby current is the current, which flows into the
regulator when the output is turned off by the control
function (Vcont=0V).
¨ Over Current Sensor
The over current sensor protects the device when there is
excessive output current. It also protects the device if the
output is accidentally connected to ground.
¨ Thermal Sensor
The thermal sensor protects the device in case the
junction temperature exceeds the safe value (TJ=150°C).
This temperature rise can be caused by external heat,
excessive power dissipation caused by large input to
output voltage drops, or excessive output current. The
regulator will shut off when the temperature exceeds the
safe value. As the junction temperatures 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.
Please reduce the loss of the regulator when this
protection operate, by reducing the input voltage or make
better heat efficiency.
* In the case that the power, Vin ´ Ishort(Short Circuit Current),
becomes more than twice of the maximum rating of its power
dissipation in a moment, there is a possibility that the IC is
destroyed before internal thermal protection works.
¨ ESD
MM: 200pF 0W 200V or more
HBM: 100pF 1.5kW 2000V or more
TK717xxS
GC3-H006F Page 24
12. PACKAGE OUTLINE
SOT23-5
2.9
1.6
1.1
0.15
0.4
2.8
2.4
Reference Mount Pad
1.0
0.7
(0.3)
0 ~0.1 ±0.1
1.3max
0.1
±0.2
Mark
±0.2
±0.2
54
13
+0.10
-0.05
+0.10
-
0.05
0.95 0.95
0.95 0.95
M
0.1
Unit : mm
Package Structure
Package Material : Epoxy Resin
Terminal Material : Copper Alloy
Mass (Reference) : 0.016g
Ｖ OUT
V CODE
Ｖ OUT
V CODE
Ｖ OUT
V CODE
Ｖ OUT
V CODE
1.5 v 15 2.5 v 25 3.5 v 35 4.5 v 45
1.6 16 2.6 26 3.6 36 4.6 46
1.7 17 2.7 27 3.7 37 4.7 47
1.8 18 2.8 28 3.8 38 4.8 48
1.9 19 2.9 29 3.9 39 4.9 49
2.0 20 3.0 30 4.0 40 5.0 50
2.1 21 3.1 31 4.1 41
2.2 22 3.2 32 4.2 42
2.3 23 3.3 33 4.3 43
2.4 24 3.4 34 4.4 44
x x K
Voltage
Code
TK717xxS
GC3-H006F Page 25
13. NOTES
Please be sure that you carefully discuss your planned
purchase with our office if you intend to use the products in
this application manual under conditions where particularly
extreme standards of reliability are required, or if you intend
to use products for applications other than those listed in this
application manual.
Power drive products for automobile, ship or aircraft
transport systems; steering and navigation systems,
emergency signal communications systems, and any
system other than those mentioned above which include
electronic sensors, measuring, or display devices, and
which could cause major damage to life, limb or property
if misused or failure to function.
Medical devices for measuring blood pressure, pulse,
etc., treatment units such as coronary pacemakers and heat
treatment units, and devices such as artificial organs and
artificial limb systems which augment physiological
functions.
Electrical instruments, equipment or systems used in
disaster or crime prevention.
Semiconductors, by nature, may fail or malfunction in
spite of our devotion to improve product quality and
reliability. We urge you to take every possible precaution
against physical injuries, fire or other damages which may
cause failure of our semiconductor products by taking
appropriate measures, including a reasonable safety margin,
malfunction preventive practices and fire-proofing when
designing your products.
This application manual is effective from Aug. 2010. Note
that the contents are subject to change or discontinuation
without notice. When placing orders, please confirm
specifications and delivery condition in writing.
ASAHI KASEI TOKO POWER DEVICES is not
responsible for any problems nor for any infringement of
third party patents or any other intellectual property rights
that may arise from the use or method of use of the products
listed in this application manual. Moreover, this application
manual does not signify that ASAHI KASEI TOKO
POWER DEVICES agrees implicitly or explicitly to license
any patent rights or other intellectual property rights which it
holds.
None of the ozone depleting substances(ODS) under the
Montreal Protocol are used in our manufacturing process.
14. OFFICES
If you need more information on this product and other
ASAHI KASEI TOKO POWER DEVICES products, please
contact us.
ASAHI KASEI TOKO POWER DEVICES CORPORATION
13-45, Senzui 3-chome, Asaka-shi, Saitama-ken
351-0024, Japan
TEL: +81-48-460-1870 (Marketing Department)
FAX: +81-48-460-1600
YOUR DISTRIBUTOR
