LM2937ES-10 Equivalent & Substitute Parts

Part Overview

The LM2937ES-10 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 10V output at 500mA in a surface-mount TO-263 (DDPAK-3) package. The main part number LM2937ES-10 is currently listed as obsolete, which necessitates identification of active equivalent alternatives for ongoing design and procurement requirements. The substitute LM2937ES-10/NOPB maintains identical electrical and mechanical specifications while offering active product status and improved compliance certifications.

Substiute Parts

LM2937ES-10

Texas InstrumentsIn Stock: 2395LM2937ES-10 Datasheet

Current PartRFQ

LM185H-1.2/NOPB

National SemiconductorIn Stock: 6071LM185H-1.2/NOPB Datasheet

DirectRFQ

LM2937ES-10/NOPB

Texas InstrumentsIn Stock: 1754LM2937ES-10/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2937ES-10 is determined by the following critical parameters:

• Output voltage specification (10V fixed)
• Output current capability (500mA minimum)
• Maximum input voltage tolerance (26V)
• Voltage dropout performance (1V @ 500mA)
• Package compatibility (TO-263 surface mount)
• Operating temperature range (-40°C ~ 125°C)
• Protection feature set (thermal, short-circuit, transient voltage protection)

The LM2937ES-10/NOPB is a direct equivalent substitute, maintaining all electrical specifications and mechanical form factor while offering active product status and RoHS3 compliance. The LM185H-1.2/NOPB is not a functional substitute for this application, as it is a shunt voltage reference IC with fundamentally different circuit topology, output characteristics (1.235V fixed reference output), and package type (TO-46-2 through-hole metal can), making it unsuitable for linear voltage regulation applications requiring 10V 500mA output.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete LM2937ES-10, the LM2937ES-10/NOPB is the direct functional and mechanical equivalent. This substitute maintains identical electrical performance across all specified parameters while offering the advantage of active product status, ensuring continued availability and supply chain stability. Additionally, the LM2937ES-10/NOPB carries RoHS3 compliance certification, meeting modern regulatory requirements for electronic component procurement.

The LM185H-1.2/NOPB does not qualify as a substitute for this linear voltage regulator application due to fundamental differences in device classification, output characteristics, and package form factor.

Frequently Asked Questions (FAQ)

Q: Can the LM2937ES-10/NOPB be used as a direct replacement for the obsolete LM2937ES-10?

A: Yes. The LM2937ES-10/NOPB is electrically and mechanically identical to the LM2937ES-10, with identical output voltage (10V), output current (500mA), input voltage rating (26V max), dropout voltage (1V @ 500mA), operating temperature range (-40°C ~ 125°C), and TO-263 surface-mount package. Pin configuration and PCB layout compatibility are maintained.

Q: What is the primary advantage of selecting the LM2937ES-10/NOPB over the obsolete part?

A: The LM2937ES-10/NOPB maintains active product status with ongoing manufacturer support and supply availability. It also meets RoHS3 compliance requirements, whereas the obsolete version does not.

Q: Is the LM185H-1.2/NOPB suitable as a substitute?

A: No. The LM185H-1.2/NOPB is a shunt voltage reference IC, not a linear voltage regulator. It produces a fixed 1.235V reference output and is packaged in TO-46-2 through-hole metal can format. It cannot provide the 10V 500mA regulated output required by applications designed for the LM2937ES-10.

Q: Are there any package or mounting differences between the obsolete and active versions?

A: Both versions use the TO-263 (DDPAK-3) surface-mount package. The primary difference is packaging format: the obsolete version is supplied in bulk, while the active version is supplied in tube format. This does not affect electrical performance or PCB integration.

Q: What compliance certifications apply to the LM2937ES-10/NOPB?

A: The LM2937ES-10/NOPB is RoHS3 compliant and REACH unaffected. Both versions carry EAR99 export classification and HTSUS code 8542.39.0001.