LM3100MHX Equivalent & Substitute Parts

Part Overview

The LM3100MHX is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with positive adjustable output. The device delivers 1.5A output current across an input voltage range of 4.5V to 36V, with adjustable output from 0.8V to 7.2V. The LM3100MHX is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

LM3100MHX

Texas InstrumentsIn Stock: 2579LM3100MHX Datasheet

Current PartRFQ

LM3100MHX/NOPB

Texas InstrumentsIn Stock: 5317LM3100MHX/NOPB Datasheet

DirectRFQ

TPS54262QPWPRQ1

Texas InstrumentsIn Stock: 3003TPS54262QPWPRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM3100MHX is determined by the following critical parameters:

• Topology & Function: Buck (step-down) switching regulator with positive adjustable output
• Package Compatibility: 20-PowerTSSOP form factor (0.173", 4.40mm Width)
• Electrical Specifications: Input voltage range, output voltage range, and output current capability
• Output Configuration: Positive adjustable topology

Two substitute parts are identified based on these criteria:

1. LM3100MHX/NOPB — Direct equivalent with identical electrical specifications and package, differentiated by product status (Active vs. Obsolete) and packaging format (Cut Tape & Digi-Reel®)
2. TPS54262QPWPRQ1 — Manufacturer-recommended substitute with enhanced specifications and automotive qualification

Parameter Comparison

Engineering Selection Recommendations

LM3100MHX/NOPB is the direct functional equivalent for applications requiring identical electrical performance and package footprint. This part maintains the same input/output voltage ranges, output current rating, and switching frequency as the obsolete LM3100MHX. The primary distinction is product status (Active) and packaging format (Cut Tape & Digi-Reel®), making it suitable for direct replacement in existing designs without circuit modification.

TPS54262QPWPRQ1 is the manufacturer-recommended substitute for applications requiring enhanced specifications or automotive-grade qualification. This part offers expanded input voltage range (3.6V to 48V), higher output current capability (2A), and extended output voltage range (0.8V to 18V). The TPS54262QPWPRQ1 carries AEC-Q100 automotive qualification and ROHS3 compliance. Applications operating within the LM3100MHX electrical envelope will function with the TPS54262QPWPRQ1, though circuit design may be optimized to leverage its higher current and voltage capabilities.

Frequently Asked Questions (FAQ)

Q: Can LM3100MHX/NOPB be used as a direct replacement for LM3100MHX?

A: Yes. The LM3100MHX/NOPB is electrically and mechanically identical to the LM3100MHX. Both devices share the same input voltage range (4.5V to 36V), output voltage range (0.8V to 7.2V), output current (1.5A), switching frequency (up to 1MHz), and 20-PowerTSSOP package. The primary difference is product status; LM3100MHX/NOPB is Active while LM3100MHX is Obsolete.

Q: What are the key differences between LM3100MHX and TPS54262QPWPRQ1?

A: The TPS54262QPWPRQ1 offers expanded specifications: lower minimum input voltage (3.6V vs. 4.5V), higher maximum input voltage (48V vs. 36V), higher output current (2A vs. 1.5A), and extended maximum output voltage (18V vs. 7.2V). The TPS54262QPWPRQ1 also includes automotive qualification (AEC-Q100) and operates across a wider temperature range (-40°C to 150°C vs. -40°C to 125°C). Both devices use the same 20-PowerTSSOP package.

Q: Is the TPS54262QPWPRQ1 a pin-compatible replacement?

A: Both devices use the 20-PowerTSSOP package with identical pinout and footprint. Pin compatibility is confirmed for direct PCB substitution.

Q: Which substitute part should be selected for new designs?

A: For new designs, LM3100MHX/NOPB is recommended if the application requires the exact electrical specifications of the original LM3100MHX. The TPS54262QPWPRQ1 is recommended for applications requiring automotive qualification, extended voltage ranges, or higher output current capability.

Q: Are there compliance differences between the substitute parts?

A: LM3100MHX is RoHS non-compliant. Both LM3100MHX/NOPB and TPS54262QPWPRQ1 are ROHS3 compliant. The TPS54262QPWPRQ1 additionally carries AEC-Q100 automotive qualification.