LM337HVH/NOPB Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM337HVH/NOPB is a linear voltage regulator IC designed for negative adjustable output applications. Manufactured by Texas Instruments, this device delivers 500mA output current in a TO-3 package configuration. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning. Equivalent parts must maintain functional compatibility across output configuration, adjustability, and thermal performance parameters while accommodating modern active product availability.

Key Parameters

Parameter	LM337HVH/NOPB
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Product Status	Obsolete
Output Configuration	Negative
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	-50V
Voltage - Output (Min/Fixed)	-1.2V
Voltage - Output (Max)	-47V
Current - Output	500mA
PSRR	60dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-205AD, TO-39-3 Metal Can
Supplier Device Package	TO-3
Base Product Number	LM337
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the LM337HVH/NOPB is determined by the following critical parameters:

Output Configuration: Must be Negative
Output Type: Must be Adjustable
Number of Regulators: Must be 1
Voltage - Output (Min/Fixed): Must be -1.2V or lower
Voltage - Output (Max): Must accommodate -47V or higher
Voltage - Input (Max): Must accommodate -50V or higher
Package / Case: Must be TO-205AD or TO-39-3 Metal Can (TO-3)
Mounting Type: Must be Through Hole
RoHS Status: Must be ROHS3 Compliant

The LM137H/NOPB qualifies as a manufacturer-recommended substitute. While it operates at reduced maximum input voltage (-40V vs. -50V), it exceeds the output current capability (1.5A vs. 500mA), maintains identical output voltage range (-1.2V to -37V), preserves the TO-3 package configuration, and is classified as an active product with extended operating temperature range (-55°C ~ 150°C vs. 0°C ~ 125°C).

Parameter Comparison

Parameter	LM337HVH/NOPB	LM137H/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active
Output Configuration	Negative	Negative
Output Type	Adjustable	Adjustable
Number of Regulators	1	1
Voltage - Input (Max)	-50V	-40V
Voltage - Output (Min/Fixed)	-1.2V	-1.2V
Voltage - Output (Max)	-47V	-37V
Current - Output	500mA	1.5A
PSRR	60dB (120Hz)	66dB (120Hz)
Protection Features	Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C	-55°C ~ 150°C
Package / Case	TO-205AD, TO-39-3 Metal Can	TO-205AD, TO-39-3 Metal Can
Supplier Device Package	TO-3	TO-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The LM137H/NOPB is the manufacturer-recommended substitute for the obsolete LM337HVH/NOPB. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system updates.

The LM137H/NOPB is an active product with extended availability, addressing the obsolescence constraint of the original part. The substitute provides enhanced current capability (1.5A vs. 500mA) and improved PSRR performance (66dB vs. 60dB), with the addition of over-current protection. The extended operating temperature range (-55°C ~ 150°C) accommodates broader environmental specifications.

Design consideration: The LM137H/NOPB operates at a reduced maximum input voltage (-40V vs. -50V). Applications requiring input voltages exceeding -40V must be evaluated against the substitute's voltage rating. The identical output voltage range (-1.2V to -37V) and TO-3 package configuration ensure mechanical and electrical compatibility for standard negative adjustable regulator applications.

Frequently Asked Questions (FAQ)

Q: Can the LM137H/NOPB directly replace the LM337HVH/NOPB in existing designs?

A: The LM137H/NOPB is compatible for applications where the input voltage does not exceed -40V. Both devices share identical output voltage adjustment range (-1.2V to -37V), TO-3 package configuration, and through-hole mounting. Verify your circuit's maximum input voltage specification against the -40V rating of the substitute.

Q: What are the key differences between these two regulators?

A: The LM137H/NOPB provides higher output current (1.5A vs. 500mA), improved power supply rejection ratio (66dB vs. 60dB), extended operating temperature range (-55°C ~ 150°C vs. 0°C ~ 125°C), and includes over-current protection. The maximum input voltage is reduced from -50V to -40V.

Q: Why is the LM337HVH/NOPB classified as obsolete?

A: The LM337HVH/NOPB is no longer in active production. The LM137H/NOPB represents the current active equivalent from Texas Instruments for negative adjustable regulator applications in the TO-3 package.

Q: Are both parts RoHS compliant?

A: Yes. Both the LM337HVH/NOPB and LM137H/NOPB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does the package configuration remain the same?

A: Yes. Both devices use the TO-205AD / TO-39-3 Metal Can (TO-3) package with through-hole mounting, ensuring identical PCB layout compatibility.

Q: What protection features does the substitute provide?

A: The LM137H/NOPB includes over-current, over-temperature, and short-circuit protection. The original LM337HVH/NOPB provides over-temperature and short-circuit protection.

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