LM137H

$15.72

Description：IC REG LINEAR NEG ADJ 1.5A TO3
Series：-
Mfr：Texas Instruments
Package：Bulk

SKU:941032c3beb1 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR NEG ADJ 1.5A TO3
Series：-
Mfr：Texas Instruments
Package：Bulk
Output Configuration：Negative
Output Type：Adjustable
Number of Regulators：1
Voltage - Input (Max)：-40V
Voltage - Output (Min/Fixed)：-1.2V
Voltage - Output (Max)：-37V
Voltage Dropout (Max)：-
Current - Output：1.5A
Current - Quiescent (Iq)：-
Current - Supply (Max)：-
PSRR：66dB (120Hz)
Control Features：-
Protection Features：Over Current, Over Temperature, Short Circuit
Operating Temperature：-55°C ~ 150°C
Mounting Type：Through Hole
Package / Case：TO-205AD, TO-39-3 Metal Can
Supplier Device Package：TO-3
Grade：-
Qualification：-

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LM137H

Overview

The LM137H is a three-terminal adjustable negative linear voltage regulator from the LM137 series, manufactured by Texas Instruments. It provides an output current of 1.5 A with an adjustable output voltage range from -37 V to -1.2 V. The device operates within an input voltage range of -40 V to -4.2 V and supports an extended operating temperature range from -55°C to +150°C. Key electrical specifications include a quiescent current of 65 µA, line regulation of 0.04%/V, load regulation of 1%, and a typical power supply rejection ratio (PSRR) of 77 dB at 120 Hz. It is housed in a TO-39-3 metal can package.

Feature Summary

Integrated internal current limiting and thermal protection mechanisms prevent device damage during overload or short-circuit conditions.
Capable of maintaining stable performance across an extended industrial temperature range suitable for harsh environments.
Features low quiescent current operation to minimize power consumption in standby or light-load scenarios.

Applications

Adjustable negative power supplies for electronic test equipment
Industrial control systems requiring reliable negative voltage rails
Military and aerospace applications utilizing extended temperature components

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm exact pinout, tolerance, and environmental compliance details. Ensure that the procurement channel is an authorized distributor to guarantee component authenticity and traceability. Confirm that the TO-39-3 package dimensions match the mechanical constraints of the target printed circuit board design before finalizing orders.

Selection Notes

Select this component when a robust, high-current negative voltage source is required for demanding applications. The LM137H is appropriate for designs needing wide input voltage ranges and extended thermal stability. Consider the through-hole mounting requirement and the need for external heat sinking due to the package's thermal characteristics compared to surface-mount alternatives.

Part Context

The LM137H belongs to the LM137 family of three-terminal adjustable negative regulators produced by Texas Instruments. This series is designed as a direct replacement for older discrete solutions, offering improved reliability and integrated protection features. It complements the positive regulator counterpart, the LM317, providing a complete solution for dual-polarity power supply designs.