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LM137, LM337-N

SNVS778E – MAY 1999 – REVISED JANUARY 2016

LM137, LM337-N 3-Terminal Adjustable Negative Regulators

1 Features

3 Description

The LM137 and LM337-N are adjustable 3-terminal

1

•

1.5-A Output Current

negative voltage regulators capable of supplying

•

Line Regulation 0.01%/V (Typical)

−1.5 A or more currents over an output voltage range

•

Load Regulation 0.3% (Typical)

of

−1.25 V to −37 V. It requires only two external

resistors to set the output voltage and one output

•

77-dB Ripple Rejection

capacitor for frequency compensation. The circuit

•

50 ppm/°C Temperature Coefficient

design has been optimized for excellent regulation

•

Thermal Overload Protection

and low thermal transients. Further, the LM137 and

LM337-N feature internal current limiting, thermal

•

Internal Short-Circuit Current Limiting Protections

shutdown and safe-area compensation, making it

virtually blowout-proof against overloads.

2 Applications

The LM137 and LM337-N are ideal complements to

•

Industrial Power Supplies

the LM117 and LM317 adjustable positive regulators.

•

Factory Automation Systems

The LM137 has a wider operating temperature range

•

Building Automation Systems

than the LM337-N and is also offered in military and

•

PLC Systems

space qualified versions.

•

Instrumentation

Device Information(1)

•

IGBT Drive Negative Gate Supplies

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Networking

LM137

TO (3)

8.255 mm × 8.255 mm

•

Set-Top Boxes

SOT-223 (4)

3.50 mm × 6.50 mm

LM337-N

TO (3)

8.255 mm × 8.255 mm

TO-220 (3)

10.16 mm × 14.986 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet. The LF01 is a lead formed (bent)

version of the TO-220 package.

Adjustable Negative Voltage Regulator

Full output current not available at high input-output voltages

†C1 = 1-

μF solid tantalum or 10-μF aluminum electrolytic required for stability

*C2 = 1-

μF solid tantalum is required only if regulator is more than 4″ from power-supply filter capacitor

Output capacitors in the range of 1-

μF to 1000-μF of aluminum or tantalum electrolytic are commonly used to provide

improved output impedance and rejection of transients

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.