TS317L
3-Terminal Adjustable Positive Voltage Regulator
TO-92
Pin Definition:
1. Adjustable
2. Output
3. Input
SOP-8
Pin Definition:
1. Input
2. Output
3. Output
4. Adjustable
8. N/C
7. Output
6. Output
5. N/C
General Description
The TS317L is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 100mA 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.
Besides replacing fixed regulators, the TS317L is useful in a wide variety of other applications. Since the regulator is
“floating “ and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as
long as the maximum input-to-output differential is not exceeded.
Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting
a fixed resistor between the adjustment and output, the TS317L can be used as a precision current regulator.
Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs
the output to 1.25V where most loads draw little current.
Features
●
●
●
●
●
●
Output Voltage Range 1.25 to 37V
Output current in Excess of 100mA
Eliminates Stocking Many Fixed Voltages
Internal Thermal Overload Protection
Current Limit Constant with Temperature
Output transistor safe-area compensation
Standard Application Circuit
●
Output voltage offered in 4% tolerance
●
Floating Operation for High Voltage Applications
Ordering Information
Part No.
TS317LCT B0
TS317LCT A3
TS317LCS RL
Package
TO-92
TO-92
SOP-8
Packing
1Kpcs / Bulk
2Kpcs / Ammo
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
1/11
Version: B07
TS317L
3-Terminal Adjustable Positive Voltage Regulator
Absolute Maximum Rating
(Ta = 25
o
C unless otherwise noted)
Parameter
Input Voltage
Power Dissipation
Operating Junction Temperature
Storage Temperature Range
Symbol
V
IN
P
D
T
J
T
STG
Limit
40
Internal Limited
-20~+125
-65~+150
Unit
V
W
o
o
C
C
Electrical Characteristics
(V
I
-V
O
= 5.0 V, Io=40mA; T
J
=T
LOW
to T
HIGH
see [Note 1]; Pmax per [Note 2]; unless otherwise specified.)
Parameter
Reference voltage, 3V
≤
Vi-Vo
≤
40V
10mA
≤
Io
≤
Imax, Pd
≤
Pmax,
Line regulation (Note 3)
o
Ta = 25 C, 3V≤Vi-Vo≤40V
Load regulation Ta = 25 C, 10mA
≤
I
O
≤
Imax (Note 3)
o
o
Figure
3
1
2
Symbol
Vref
REGline
REGload
Min.
1.20
--
--
--
--
--
Typ.
1.25
0.01
5.0
0.1
0.03
50
Max.
1.30
0.07
25
0.5
0.07
100
Unit
V
%/V
mV
%V
%Vo/W
uA
Thermal regulation, Ta = 25 C (Note 6), 20mS Pulse
REGtherm
Adjustment pin current
3
Iadj
Adjustment pin current change, 3V
≤
V
I
- V
O
≤
40V
--
0.2
5.0
uA
10mA
≤
Io
≤
Imax, Pd
≤
Pmax,
1.2
ΔIadj
Maximum output current
V
I
- V
O
≤
6.25V, Pd
≤
Pmax (TO-92 package)
3
Imax
100
200
--
mA
o
V
I
- V
O
≤
40V, Pd
≤
Pmax, Ta = 25 C (TO-92
--
20
--
package)
Temperature stability (T
LOW
≤
Tj
≤
T
HIGH
)
3
T
S
--
1
--
% Vo
Minimum load current to maintain regulation
3
ILmin
--
3.5
10
mA
(V
I
- V
O
= 40 V)
o
RMS Noise, % of V
O,
Ta =25 C, 10Hz
≤
f
≤
10KHz
N
--
0.003
--
% Vo
Ripple Rejection, Vo =10V, f =120Hz (Note 4)
Without Cadj
4
PSRR
--
65
--
dB
Cadj = 10uF
66
80
--
Long-term stability (Note 5), Tj = T
HIGH
3
S
--
0.3
1.0
%
o
Ta =25 C for endpoint measurements,1000hrs
Notes:
o
o
1. T
LOW
to T
HIGH
= -20 C to +125 C
2. Pmax is internally limited
3. 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.
4. Cadj, when used, is connected between the adjustment pin and ground.
5. 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.
6. 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.
2/11
Version: B07
TS317L
3-Terminal Adjustable Positive Voltage Regulator
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
3/11
Version: B07
TS317L
3-Terminal Adjustable Positive Voltage Regulator
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
4/11
Version: B07
TS317L
3-Terminal Adjustable Positive Voltage Regulator
Electrical Characteristics Curve
Figure 11. Ripple Rejection
Figure 12. Ripple Rejection vs. Frequency
Figure 13. Line Regulation
Figure 14. Output Noise
Figure 15. Line Transient Response
Figure 16. Load Transient Response
5/11
Version: B07
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