R1

Adjustment

Output

Input

LM317L

I

limit

1.25

R1

=

R2 = 3 kW

1N4002

R3 =

820 W

−10 V

C1 = 0.1 µF

35 V

Adjustment

Output

Input

LM317L

R1 = 120 W

2

3

OUT

REF

1

R

R

V

V

1

10 V

R

æ

ö

+

=

+

-

ç

÷

è

ø

R1 =

470 W

1N4002

C3 = 1 µF

C2 = 10 µF

R2 =

10 kW

+

+

−

−

Adjustment

Output

Input

LM317L

C1 =

0.1 µF

LM317L

SLCS144E – JULY 2004 – REVISED OCTOBER 2014

www.ti.com

9.3 General Configurations

9.3.1 Regulator Circuit With Improved Ripple Rejection

C2 helps to stabilize the voltage at the adjustment pin, which will help reject noise. Diode D1 exists to discharge

C2 in case the output is shorted to ground.

Figure 3. Regulator Circuit With Improved Ripple Rejection

9.3.2 0-V to 30-V Regulator Circuit

In the 0-V to 30-V regulator circuit application, the output voltage is determined by Equation 4.

(4)

Figure 4. 0-V to 30-V Regulator Circuit

9.3.3 Precision Current-Limiter Circuit

Figure 5. Precision Current-Limiter Circuit

10

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