LM317

240 W

Adjust

0.1 µF

1.0 µF

Output

Input

D1

1N4002

D2

1N4002

LM317

SLVS044W – SEPTEMBER 1997 – REVISED OCTOBER 2014

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The flexibility of the LM317 allows it to be configured to take on many different functions in DC power

applications.

9.2 Typical Application

Figure 9. Adjustable Voltage Regulator

9.2.1 Design Requirements

•

R1 and R2 are required to set the output voltage.

•

is adjusted higher.

•

0.1-µF disc or 1-µF tantalum capacitor provides sufficient bypassing for most applications, especially when

adjustment and output capacitors are used.

•

•

prevent the capacitor from discharging into the output of the regulator.

•

prevent the capacitor from discharging into the output of the regulator.

9.2.2 Detailed Design Procedure

(1)

10

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