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LM337BTG

ONLM337BTG

onsemi
Linear Voltage Regulator IC Negative Adjustable 1 Output 1.5A TO-220
Active7,411 in stock
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Overview

The LM337BTG is an adjustable 3-terminal negative voltage regulator capable of supplying in excess of 1.5A over an output voltage range of -1.2V to -37V. This robust linear regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. It features internal current limiting, thermal shutdown, and safe-area compensation, making it essentially blowout-proof.

Why Choose This Part

The LM337BTG offers a high Power Supply Rejection Ratio (PSRR) of 77dB at 120Hz, ensuring clean power for noise-sensitive analog circuitry. Its TO-220 package provides excellent thermal dissipation for high-current applications up to 1.5A, and the device eliminates the need to stock multiple fixed-voltage regulators.

Applications

Split Power Supplies
Used alongside the LM317 to create symmetrical positive and negative voltage rails for operational amplifiers and high-fidelity audio circuits.
Precision Instrumentation
Provides a stable negative reference or supply rail for sensitive analog-to-digital converters and measurement front-ends.
Variable Power Supplies
Serves as the core regulation stage for benchtop or embedded negative adjustable power sources.
Negative Logic Supplies
Regulates negative rails required for ECL (Emitter-Coupled Logic) or certain legacy communication interfaces.

Key Specifications

PSRR 77dB (120Hz)
Output Type Adjustable
Mounting Type Through Hole
Package / Case TO-220-3
Current - Output 1.5A
Protection Features Over Current, Over Temperature
Number of Regulators 1
Output Configuration Negative
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) -40V
Current - Supply (Max) 10 mA
Voltage - Output (Max) -37V
Supplier Device Package TO-220
Current - Quiescent (Iq) 6 mA
Voltage - Output (Min/Fixed) -1.2V

Getting Started

To implement the LM337BTG, connect a resistive divider between the output, adjustment, and ground pins to set the desired negative voltage. Ensure that input and output capacitors are placed close to the device pins for stability, typically using a 1uF tantalum or 25uF electrolytic capacitor on the output to improve transient response. Note that the TO-220 tab is electrically connected to the input terminal, not ground.

Categories

Power Management > LDO Voltage Regulators