TL317_15 Datasheet, PDF (5/22 Pages) Texas Instruments – 3-TERMINAL ADJUSTABLE REGULATOR

TL317
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VI
C1 = 0.1 mF ^(A)
TL317
Input Output
Adjustment
SLVS004H – APRIL 1979 – REVISED OCTOBER 2011
APPLICATION INFORMATION
R1
470 Ω
VO^(B)
C2 = 1 mF ^(C)
R2
35 V
C1 = 0.1 mF
TL317
Input Output
Adjustment
10 V
R3 =
820 Ω
VO ^(A)
R1 = 120 Ω
R2 = 3 kΩ
A. Use of an input bypass capacitor is recommended if
regulator is far from the filter capacitors.
B. Output voltage is calculated from the equation:
V_O
=
V_ref
æçè₁₊
R2
R1
ö
÷ø
where: V_ref equals the difference between OUTPUT and
ADJUSTMENT voltages (≈1.25 V).
C. Use of an output capacitor improves transient response,
but is optional.
Figure 1. Adjustable Voltage Regulator
VI
C1 =
0.1 mF
TL317
Input Output
Adjustment R1 =
470 Ω
D1^(A)
1N4002
VO^(B)
R2 =
10 kΩ
+
C2 = 10 mF
+
C3 = 1 mF
1N4002
A. Output voltage is calculated from the equation:
V_O
=
V_ref
æçè₁₊
R2 + R3
R1
ö÷ø
-
10
V
where: V_ref equals the difference between OUTPUT
and ADJUSTMENT voltages (≈1.25 V).
Figure 2. 0-V to 30-V Regulator Circuit
TL317
VI
Input Output
Adjustment
R1
I_limit
=
1.25
R1
A. D1 discharges C2 if output is shorted to ground.
B. Use of an output capacitor improves transient response, but is
optional.
Figure 3. Regulator Circuit With Improved Ripple
Rejection
Figure 4. Precision Current-Limiter Circuit
Copyright © 1979–2011, Texas Instruments Incorporated
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