TS317
3-Terminal Adjustable Positive Voltage Regulator
1/14
Version: D07
TO
-
220
TO
-
263
(D
2
PAK)
TO
-
252
(DPAK)
SOT
-
223
General Description
The TS317 is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 1.5A over an output
voltage range of 1.25 V to 37 V. This voltage regulator is exceptionally easy to use and require only two external
resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blow-out proof.
Features
● Output Voltage Range 1.25 to 37V
● Output current
- TO-220/TO-263 up to 1.5A
- TO-252/SOT-223 up to 500mA
● Eliminates Stocking Many Fixed Voltages
● Internal Thermal Overload Protection
● Current Limit Constant with Temperature
● Output transistor safe-area compensation
● Output voltage offered in 4% tolerance
● Floating Operation for High Voltage Applications
Standard Application Circuit
Ordering Information
Part No. Package Packing
TS317CZ C0 TO-220 50pcs / Tube
TS317CM RN TO-263 800pcs / 13” Reel
TS317CP RO TO-252 2.5Kpcs / 13” Reel
TS317CW RP SOT-223 2.5Kpcs / 13” Reel
Cin is required if regulator is located an appreciable
distance from power supply filter.
Co is not needed for stability, however, it does improve
transient response.
Vout = 1.25 V(1 + R2
/ R1 ) + I
Adj
R2
Since I
Adj
is controlled to less than 100 µA, the error
associated with this term is negligible in most
applications
Absolute Maximum Rating
(Ta = 25
o
C unless otherwise noted)
Parameter Symbol Limit Unit
Input Voltage V
IN
40 V
Power Dissipation P
D
Internal Limited W
Operating Junction Temperature T
J
0~+125
o
C
Storage Temperature Range T
STG
-65~+150
o
C
Pin
Definition
:
1. Adjustable
2. Output
3. Input
Heatsink is connected to Pin 2
TS317
3-Terminal Adjustable Positive Voltage Regulator
2/14
Version: D07
Thermal Performance
Condition Package type
Symbol
Typ Unit
Thermal Resistance Junction to Air
TO-220
RΘ
JA
50
o
C/W
TO-263 55
TO-252 100
SOT-223 130
Thermal Resistance Junction to Case
TO-220
RΘ
JC
5
o
C/W
TO-263 5
TO-252 10
SOT-223 15
Electrical Characteristics
(V
I
-V
O
= 5.0 V, Io=500mA for TO-220/TO-263 packages, Io=200mA for TO-252/SOT-223 package)
Parameter Figure
Symbol Min. Typ. Max. Unit
Reference voltage, 3V ≤ Vi-Vo ≤ 40V
10mA ≤ Io ≤ Imax, Pd ≤ Pmax, 3 Vref 1.20 1.25 1.30 V
Line regulation (Note 3)
Ta = 25
o
C, 3V≤Vi-Vo≤40V 1 REGline -- 0.01 0.07 %/V
Load regulation Ta = 25
o
C, 10mA ≤ I
O
≤ Imax (Note 2)
V
O
≤ 5.0
V
O
≥ 5.0
2 REGload
--
--
5.0
0.1
25
0.5
mV
%V
Thermal regulation, Ta = 25
o
C (Note 5), 20mS Pulse REGtherm
-- 0.03 0.07 %Vo/W
Adjustment pin current 3 Iadj -- 50 100 uA
Adjustment pin current change, 3V ≤ V
I
- V
O
≤ 40V
10mA ≤ Io ≤ Imax, Pd ≤ Pmax, 1.2
∆Iadj -- 0.2 5.0 uA
Maximum output current, V
I
- V
O
≤ 15V, Pd ≤ Pmax
TO-220 / TO-263 Package
TO-252 / SOT-223 Package 3 Imax
1.5
0.5
--
--
--
-- A
Temperature stability (T
LOW
≤ Tj ≤ T
HIGH
) 3 T
S
-- 1 -- % Vo
Minimum load current to maintain regulation
(V
I
- V
O
= 40 V) 3 ILmin -- 3.5 10 mA
RMS Noise, % of V
O
,
Ta =25
o
C, 10Hz
≤ f ≤ 10KHz N -- 0.003
-- % Vo
Ripple Rejection, Vo =10V, f =120Hz (Note 3)
Without Cadj
Cadj = 10uF 4 PSRR
--
66
65
80
--
-- dB
Long-term stability (Note 4), Tj
= 125ºC, 1000hrs 3 S -- 0.3 1.0 %
Notes: 1. T
LOW
to T
HIGH
= 0
o
C to +125
o
C, Pmax is internally limited
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating
effects must be taken into account separately. Pulse testing with low duty cycle is used.
3. Cadj, when used, is connected between the adjustment pin and ground. Since Long-Term Stability cannot
be measured on each device before shipment, this specification is an engineering estimate of average
stability from lot to lot.
4. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting
individual IC components on the die. These effects can be minimized by proper integrated circuit design and
layout techniques. Thermal Regulation in the effect of these temperature gradients on the output voltage
and is expressed in the percentage of output change per watt of power change in a specified time.
TS317
3-Terminal Adjustable Positive Voltage Regulator
3/14
Version: D07
Functional Block Diagram
Test Circuit
Figure 1. Line Regulation Test Circuit Figure 2. Load Regulation and
∆Iadj/Load Test Circuit
Figure 3. Standard Test Circuit Figure 4. Ripple Rejection Test Circuit
TS317
3-Terminal Adjustable Positive Voltage Regulator
4/14
Version: D07
Electrical Characteristics Curve
Figure 5. Load Regulation
Figure 6. Current Limit
Figure 7. Adjustment Pin Current
Figure 8. Dropout Voltage
Figure 9. Temperature Stability
Figure 10. Minimum Operating Current
TS317
3-Terminal Adjustable Positive Voltage Regulator
5/14
Version: D07
Electrical Characteristics Curve
Figure 11. Ripple Rejection vs. Output Voltage
Figure 12. Ripple Rejection vs. Output Current
Figure 13. Ripple Rejection vs. Frequency
Figure 14. Output Impedance
Figure 15. Line Transient Response
Figure 16. Load Transient Response
TS317
3-Terminal Adjustable Positive Voltage Regulator
6/14
Version: D07
Application information
Basic Circuit Operation
The TS317 is a 3-terminal floating regulator. In operation, the TS317 develops and maintains a nominal 1.25V reference (Vref)
between its output and adjustment terminals. This reference voltage is converted to a programming current (Iprog.) by R
1
(see
Figure 17), and this constant current flows through R
2
to ground. The regulated output voltage is given by:
Vout = Vref ( 1 + R2 / R1 ) + Iadj * R2
Since the current from the adjustment terminal (Iadj) represents an error term in the equation, the TS317 was designed to control
Iadj to less than 100uA and keep it constant. To do this, all quiescent operating current is returned to the output terminal. This
imposes the requirement for a minimum load current. If the load current is less than this minimum, the output voltage will rise.
Since the TS317 is a floating regulator, it is only the voltage differential across the circuit which is important to performance, and
operation at high voltages with respect to ground is possible.
Figure 17. Basic Circuit Configuration
Figure 18. Voltage Regulator with Protection Diode
Protection Diode
When external capacitors are used with any I.C. regulator it is sometimes necessary to add protection diodes to prevent the
capacitors from discharging through low current points into the regulator.
Figure 18 shows the TS317 with the recommended protection diodes for output voltages in excess of 25 V or high capacitance
values (Co > 25uF, Cadj > 10uF). Diode D1 prevents Co from discharging thru the I.C. during an input short circuit. Diode D2
protects against capacitor C
ADJ
discharging through the I.C. during an output short circuit. The combination of diodes D1
and D2
prevents C
ADJ
from discharging through the I.C. during an input short circuit.
Load Regulation
The TS317 is capable of providing extremely good load regulation, but a few precautions are needed to obtain maximum
performance. For best performance, the programming resistor (R1) should be connected as close to the regulator as possible to
minimize line drops which effectively appear in series with the reference, thereby degrading regulation. The ground end of R2 can
be returned near the load ground to provide remote ground sensing and improve load regulation.
External Capacitor
A 0.1µF disc or 1µF tantalum input bypass capacitor (Cin) is recommended to reduce the sensitivity to input line impedance.
The adjustment terminal may be bypassed to ground to improve ripple rejection. This capacitor (Cadj) prevents ripple from being
amplified as the output voltage is rejection about 15dB at 120 H
Z
in a 10V application.
Although the TS317 is stable with no output capacitance, like any feedback circuit, certain values of external capacitance can
cause excessive ringing. An output increased. A 10uµF capacitor should improve ripple capacitance (Co) in the form of a 1uF
tantalum or 25uF aluminum electrolytic capacitor on the output swamps this effect and insures stability.
TS317
3-Terminal Adjustable Positive Voltage Regulator
7/14
Version: D07
Application information (Continue)
Figure 19. “LABORATORY” power supply with adjustable current limit and output voltage
Figure 20. Adjustable Current Limiter
Figure 21. 5V Electronic Shutdown Regulator
TS317
3-Terminal Adjustable Positive Voltage Regulator
8/14
Version: D07
Application information (Continue)
Figure 22. Slow Turn-on Regulator
Figure 23. Current Regulator
TS317
3-Terminal Adjustable Positive Voltage Regulator
9/14
Version: D07
Application Information
Figure 24. D
2
PAK Thermal Resistance and Maximum Power
Dissipation vs. P.C.B Copper Length
Figure 25. DPAK Thermal Resistance and Maximum Power
Dissipation vs. P.C.B Copper Length
Figure 26. SOT-223 Thermal Resistance and Maximum Power
Dissipation vs. P.C.B Copper Length
TS317
3-Terminal Adjustable Positive Voltage Regulator
10/14
Version: D07
TO-220 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
CZ
= Package Code for TO
-220
TO-220 DIMENSION
DIM
MILLIMETERS INCHES
MIN MAX MIN MAX
A 10.000 10.500 0.394 0.413
B
3.740 3.910 0.147 0.154
C 2.440 2.940 0.096 0.116
D - 6.350 - 0.250
E 0.381 1.106 0.015 0.040
F 2.345 2.715 0.092 0.058
G 4.690 5.430 0.092 0.107
H 12.700 14.732 0.500 0.581
I 8.382 9.017 0.330 0.355
J 14.224 16.510 0.560 0.650
K 3.556 4.826 0.140 0.190
L 0.508 1.397 0.020 0.055
M 27.700 29.620 1.060 1.230
N 2.032 2.921 0.080 0.115
O 0.255 0.610 0.010 0.024
P 5.842 6.858 0.230 0.270
TS317
3-Terminal Adjustable Positive Voltage Regulator
11/14
Version: D07
TO-263 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
CM
= Package Code for TO
-263
TO-263 DIMENSION
DIM
MILLIMETERS INCHES
MIN MAX MIN MAX
A 10.000 10.500 0.394 0.413
B 14.605 15.875 0.575 0.625
C 0.508 0.991 0.020 0.039
D 2.420 2.660 0.095 0.105
E 4.064 4.830 0.160 0.190
F 1.118 1.400 0.045 0.055
G 0.450 0.730 0.018 0.029
H 8.280 8.800 0.325 0.346
I 1.140 1.400 0.044 0.055
J 1.480 1.520 0.058 0.060
TS317
3-Terminal Adjustable Positive Voltage Regulator
12/14
Version: D07
TO-252 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
CP
= Package Code for TO
-252
TO-252 DIMENSION
DIM
MILLIMETERS INCHES
MIN MAX MIN MAX
A 2.3BSC 0.09BSC
A1
4.6BSC 0.18BSC
B 6.80 7.20 0.268 0.283
C 5.40 5.60 0.213 0.220
D 6.40 6.65 0.252 0.262
E 2.20 2.40 0.087 0.094
F 0.00 0.20 0.000 0.008
G 5.20 5.40 0.205 0.213
G1
0.75 0.85 0.030 0.033
G2
0.55 0.65 0.022 0.026
H 0.35 0.65 0.014 0.026
I 0.90 1.50 0.035 0.059
J 2.20 2.80 0.087 0.110
K 0.50 1.10 0.020 0.043
L 0.90 1.50 0.035 0.059
M 1.30 1.70 0.051 0.67
TS317
3-Terminal Adjustable Positive Voltage Regulator
13/14
Version: D07
SOT-223 Mechanical Drawing
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
CW
= Package Code for TO
-223
SOT-223 DIMENSION
DIM
MILLIMETERS INCHES
MIN MAX MIN MAX
A 6.350 6.850 0.250 0.270
B 2.900 3.100 0.114 0.122
C 3.300 3.750 0.129 0.148
D 0.660 0.840 0.025 0.033
E 4.550 4.650 0.179 0.183
F 2.250 2.350 0.088 0.093
G 0.850 1.050 0.033 0.041
H 6.700 7.300 0.263 0.287
I 0.230 0.355 0.009 0.014
J 10° 16° 10° 16°
K 1.550 1.800 0.061 0.071
TS317
3-Terminal Adjustable Positive Voltage Regulator
14/14
Version: D07
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to any
intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for
such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale
and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability,
or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for
any damages resulting from such improper use or sale.
