LM337AT datasheet(1/10 Pages) ONSEMI

Part #	LM337AT

Description	1.5 A, Adjustable Output, Negative Voltage Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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April, 2012 − Rev. 9

1

Publication Order Number:

LM337/D

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

Figure 1. Standard Application

Vout + –1.25V 1 )

R

2

R

1

*Cin 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.

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

** is recommended.

LM337

IPROG

Cin*

1.0

mF

+

-Vin

Vin

Vout

-Vout

CO**

1.0

mF

+

IAdj

R1

120

R2

THREE−TERMINAL

ADJUSTABLE NEGATIVE

VOLTAGE REGULATOR

TO−220AB

T SUFFIX

CASE 221AB

1

MARKING

DIAGRAMS

LM

337xx

AWLYWWG

Pin 1. Adjust

2. Vin

3. Vout

Heatsink surface

connected to Pin 2.

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

ORDERING INFORMATION

xx

= BT, T

yyyy = BD2T, D2T

A

= Assembly Location

WL

= Wafer Lot

Y

= Year

WW = Work Week

G= Pb−Free Package

http://onsemi.com

D2PAK

D2T SUFFIX

CASE 936

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

LM

337yyyy

AWLYWWG

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