C1

+

C2

R1

R2

+

INPUT

OUTPUT

ADJUSTMENT

LM237

or

LM337

V

V

O

I

ADJUSTMENT

OUTPUT

INPUT

VI

S

R

VO

LM237

or

LM337

RS =

1.25 V

ILIMIT

OUT

I

LM237, LM337

www.ti.com

SLVS047L – NOVEMBER 1981 – REVISED JANUARY 2015

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

9.1.1 General Configurations

Figure 2. Current-Limiting Circuit

This application uses the LMx37 device's reference voltage, combined with the series resistor RS, to limit the

current to 1.25 V ÷ RS

9.2 Typical Application

Figure 3. Adjustable Negative-Voltage Regulator

9.2.1 Design Requirements

•

1-µF solid tantalum on the input pin if the regulator is more than 10 cm from the power supply filter capacitor

•

1-µF solid tantalum or 10-µF aluminum electrolytic capacitor is required on the output pin for stability.

•

R1, which is usually 120

Ω as part of the resistor divider.

•

R2, which can be varied to change the value of VO.

Copyright © 1981–2015, Texas Instruments Incorporated

Submit Documentation Feedback

9

Product Folder Links: LM237 LM337