Datasheet

ManualsBrandsFAIRCHILD SEMICONDUCTOR ManualsVoltage RegulatorsAdjustable Voltage Regulators, Negative

www.fairchildsemi.com

Rev. 1.0.4

Features

• Output Current in Excess of 1.5A

• Output Voltage Adjustable Between -1.2V and -37V

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe Area Compensation

• Floating Operation for High Voltage Applications

• Standard 3-Pin TO-220 Package

Description

The LM337 is a 3-terminal negative adjustable regulator. It

supplies in excess of 1.5A over an output voltage range of

-1.2V to -37V. This regulator requires only two external

resistor to set the output voltage. Included on the chip are

current limiting, thermal overload protection and safe area

compensation.

TO-220

1. Adj 2. Input 3. Output

(Single Gauge)

Internal Block Diagram

Voltage

Reference

Protection

Circuitry

Output

Input

Vadj

LM337

3-Terminal 1.5A Negative Adjustable Regulator

Summary of content (6 pages)

PAGE 1
www.fairchildsemi.com LM337 3-Terminal 1.5A Negative Adjustable Regulator Features Description • • • • • • • The LM337 is a 3-terminal negative adjustable regulator. It supplies in excess of 1.5A over an output voltage range of -1.2V to -37V. This regulator requires only two external resistor to set the output voltage. Included on the chip are current limiting, thermal overload protection and safe area compensation. Output Current in Excess of 1.5A Output Voltage Adjustable Between -1.
PAGE 2
LM337 Absolute Maximum Ratings Parameter Symbol Value Unit Input-Output Voltage Differential |VI - VO| 40 V PD Internally limited W Operating Temperature Range TOPR 0 ~ +125 °C Storage Temperature Range TSTG -65 ~ +125 °C Power Dissipation Electrical Characteristics (VI - VO = 5V, IO = 40mA, 0°C ≤ TJ ≤ +125°C, PDMAX = 20W, unless otherwise specified) Parameter Line Regulation (Note1) Load Regulation (Note1) Adjustable Pin Current Adjustable Pin Current Change Reference Voltage Tempera
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LM337 Typical Application IPROG R2 Ci 0. 1μF + + Iadj R1 Co 1μF Vadj -VI VI KA337 LM337 Vo -Vo Figure 1. Programmable Regulator • Ci is required if regulator is located more then 4 inches from power supply filter. A 1.0μF solid tantalum or 10μF aluminum electrolytic is recommended. Co is necessary for stability. A 1.0μF solid tantalum or 10μF aluminum electrolytic is recommended. • VO= -1.
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LM337 Mechanical Dimensions Package Dimensions in millimeters TO-220 [ SINGLE GAUGE ] 4
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LM337 Ordering Information Product Number Package Operating Temperature LM337T TO-220 (Single Gauge) 0°C to +125°C 5
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LM337 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.