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C1

0.1

µF

R1

120

Ω

R2

3 k

Ω

INPUT

OUTPUT

ADJUST

LM317

+35 V

R3

680

Ω

−10 V

V

O

R2 ) R3

R1

C1

0.1

µF

C3

1

µF

R1

240

Ω

INPUT

OUTPUT

ADJUST

LM317

D1

1N4002

(see Note A)

R2

5 k

Ω

C2

10

µF

NOTE A: D1 discharges C2 if the output is shorted to ground.

ADJUST

OUTPUT

INPUT

R1

LM317

I

1.2

R1

LM317

3-TERMINAL ADJUSTABLE REGULATOR

SLVS044R – SEPTEMBER 1997 – REVISED APRIL 2007

APPLICATION INFORMATION (continued)

Figure 2. 0-V to 30-V Regulator Circuit

Figure 3. Adjustable Regulator Circuit With Improved Ripple Rejection

Figure 4. Precision Current-Limiter Circuit

8

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