Datasheet

V
O
(A)
R2 = 3 kΩ
1N4002
R3 =
820 Ω
10 V
C1 = 0.1 mF
35 V
Adjustment
OutputInput
TL317
R1 = 120 Ω
A. Output voltage is calculated from the equation:
O ref
R2 + R3
V = V 1+ -10 V
R1
æ ö
ç ÷
è ø
where: V equals the difference between OUTPUT
and ADJUSTMENT voltages ( 1.25 V).
ref
≈
C1 = 0.1
mF
(A)
V
I
470 Ω
R1
R2
C2 = 1 mF
V
O
(B)
Adjustment
OutputInput
TL317
(C)
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:
O ref
R2
V = V 1+
R1
æ ö
ç ÷
è ø
where: V equals the difference between OUTPUT and
ADJUSTMENT voltages ( 1.25 V).
ref
≈
C. Use of an output capacitor improves transient response,
but is optional.
V
I
R1
Adjustment
OutputInput
TL317
I
limit
1.25
R1
=
R1 =
470 Ω
D1
(A)
1N4002
C3 = 1 mF
C2 = 10 mF
R2 =
10 kΩ
V
I
+
+
Adjustment
OutputInput
TL317
V
O
(B)
C1 =
0.1 mF
A. D1 discharges C2 if output is shorted to ground.
B. Use of an output capacitor improves transient response, but is
optional.
TL317
www.ti.com SLVS004H –APRIL 1979– REVISED OCTOBER 2011
APPLICATION INFORMATION
Figure 1. Adjustable Voltage Regulator Figure 2. 0-V to 30-V Regulator Circuit
Figure 3. Regulator Circuit With Improved Ripple Figure 4. Precision Current-Limiter Circuit
Rejection
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Product Folder Link(s): TL317