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LM337BD2TG

1.5 A, Adjustable Output, Negative Voltage Regulator

ON Semiconductor 

LM337

1.5 A, 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.

Features

• Output Current in Excess of 1.5 A

• Output Adjustable between −1.2 V and −37 V

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting Constant with Temperature

• Output Transistor Safe−Area Compensation

• Floating Operation for High Voltage Applications

• Eliminates Stocking many Fixed Voltages

• Available in Surface Mount D2PAK and Standard 3−Lead Transistor

Package

• Pb−Free Packages are Available

Standard Application

IPROG

Cin*

+

1.0 mF

IAdj

R2

R1

120

CO** +

1.0 mF

Vin

Vout

−Vin

LM337

−Vout

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

* A 1.0 mF solid tantalum or 10 mF aluminum electrolytic is recommended.

**C O is necessary for stability. A 1.0 mF solid tantalum or 10 mF aluminum electrolytic

** is recommended.

ǒ Ǔ Vout + –1.25 V

1

)

R2

R1

http://onsemi.com

THREE−TERMINAL

ADJUSTABLE NEGATIVE

VOLTAGE REGULATOR

MARKING

DIAGRAMS

D2PAK

LM

337yyyy

D2T SUFFIX

AWLYWWG

1

CASE 936

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

Pin 1. Adjust

2. Vin

3. Vout

TO−220AB

T SUFFIX

CASE 221AB

Heatsink surface

connected to Pin 2.

LM

337xx

AWLYWWG

1

xx

yyyy

A

WL

Y

WW

G

= BT, T

= BD2T, D2T

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

© Semiconductor Components Industries, LLC, 2006

1

August, 2006 − Rev. 6

Publication Order Number:

LM337/D

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