LM337LM Linear Voltage Regulator IC Negative Adjustable

Part Overview

The LM337LM is a linear voltage regulator IC designed for negative adjustable output applications. It delivers 100mA output current in an 8-SOIC surface mount package. The device features integrated over-temperature and short-circuit protection, making it suitable for precision negative voltage regulation in power management circuits.

The main part (LM337LM) carries a Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for ongoing production and maintenance applications.

Substiute Parts

LM337LM

Texas InstrumentsIn Stock: 3521LM337LM Datasheet

Current PartRFQ

LM337LM/NOPB

Texas InstrumentsIn Stock: 16176LM337LM/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM337LM is determined by strict equivalence across the following critical parameters:

Output configuration (negative), output type (adjustable), single regulator topology, input voltage rating (-40V maximum), output voltage range (-1.2V to -37V), output current capacity (100mA), protection features (over-temperature and short-circuit), operating temperature range (-25°C to 125°C), and physical package specification (8-SOIC surface mount).

The substitute part LM337LM/NOPB maintains identical electrical and mechanical specifications while differing only in product status and inventory availability. The "/NOPB" suffix indicates lead-free plating compliance and does not alter functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LM337LM/NOPB is a direct functional equivalent to the LM337LM. Both parts are manufactured by Texas Instruments and maintain identical electrical performance specifications and physical packaging. The primary distinction is product lifecycle status: LM337LM is designated Last Time Buy, while LM337LM/NOPB maintains Active status with higher inventory availability (16,089 units versus 3,419 units).

For new designs or ongoing production requiring negative adjustable voltage regulation at 100mA output, LM337LM/NOPB is the preferred selection due to its active product status and sustained supply chain support. Both parts satisfy ROHS3 compliance and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can LM337LM/NOPB be used as a direct replacement for LM337LM in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The "/NOPB" designation indicates lead-free plating and does not affect functional performance or pin compatibility.

Q: What does the Last Time Buy status mean for LM337LM?

A: Last Time Buy indicates the manufacturer has ceased production and will not accept new orders after a specified cutoff date. Existing inventory may be available but will not be replenished. LM337LM/NOPB, with Active status, ensures continued availability.

Q: Are there any thermal or electrical performance differences between these parts?

A: No. Both parts deliver identical PSRR (60dB at 120Hz), output current (100mA), voltage ratings, and protection features across the same operating temperature range (-25°C to 125°C).

Q: Is the 8-SOIC package footprint identical for both parts?

A: Yes. Both parts use the 8-SOIC package with 0.154" width (3.90mm). PCB layouts and assembly processes require no modification.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both LM337LM and LM337LM/NOPB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.