LM337

Order this document by LM337/D

Device

Operating

Temperature Range

Package

ORDERING INFORMATION

LM337D2T

LM337T

Surface Mount

Insertion Mount

LM337BD2T

LM337BT

TJ = – 40° to +125°C

Surface Mount

Insertion Mount

TJ = 0° to +125°C

SEMICONDUCTOR

TECHNICAL DATA

THREE–TERMINAL

ADJUSTABLE NEGATIVE

VOLTAGE REGULATOR

Pin 1. Adjust

2. Vin

3. Vout

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface

connected to Pin 2.

3

1

2

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

(D2PAK)

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

3

1

2

1

MOTOROLA ANALOG IC DEVICE DATA

Three-Terminal Adjustable

Output Negative Voltage

Regulator

The LM337 is an adjustable 3–terminal negative voltage regulator

capable of supplying in excess of 1.5 A over an output voltage range of

–1.2 V to – 37 V. This voltage regulator is exceptionally easy to use and

requires only two external resistors to set the output voltage. Further, it

employs internal current limiting, thermal shutdown and safe area

compensation, making it essentially blow–out proof.

The LM337 serves a wide variety of applications including local, on card

regulation. This device can also be used to make a programmable output

regulator, or by connecting a fixed resistor between the adjustment and

output, the LM337 can be used as a precision current regulator.

Package

Standard Application

Vout + –1.25 V 1 )

R

2

R

1

*Cin is required if regulator is located more than 4 inches from power supply filter.

µF solid tantalum or 10 µF aluminum electrolytic is recommended.

** CO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum electrolytic

LM337

IPROG

Cin*

1.0

µF

+

–Vin

Vin

Vout

–Vout

CO**

1.0

µF

+

IAdj

R1

120

R2

© Motorola, Inc. 1996

Rev 1