LM2853MH-3.3 Equivalent & Substitute Parts

Part Overview

The LM2853MH-3.3 is a buck switching regulator IC from Texas Instruments' SIMPLE SWITCHER® series, designed for step-down voltage conversion with a fixed 3.3V output at 3A maximum current. The device operates across an input voltage range of 3V to 5.5V and features a synchronous rectifier topology with 550kHz switching frequency. The main part number is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

LM2853MH-3.3

Texas InstrumentsIn Stock: 2174LM2853MH-3.3 Datasheet

Current PartRFQ

LM2853MH-3.3/NOPB

Texas InstrumentsIn Stock: 1743LM2853MH-3.3/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM2853MH-3.3 is determined by strict equivalence across the following electrical and mechanical parameters:

• Fixed output voltage of 3.3V
• Output current capability of 3A
• Input voltage range of 3V to 5.5V
• Switching frequency of 550kHz
• Synchronous rectifier topology
• 14-PowerTSSOP package configuration
• Operating temperature range of -40°C to 125°C

The substitute part LM2853MH-3.3/NOPB maintains identical electrical specifications and mechanical packaging, with the primary distinction being product status and compliance certification. The "/NOPB" suffix indicates lead-free (no-lead) packaging compliance.

Parameter Comparison

Engineering Selection Recommendations

The LM2853MH-3.3/NOPB is the direct functional equivalent of the obsolete LM2853MH-3.3. Selection between these parts is determined by regulatory and compliance requirements:

• For applications requiring ROHS3 compliance, the LM2853MH-3.3/NOPB is the appropriate choice.
• For legacy systems or applications without RoHS compliance mandates, either part meets the electrical and mechanical specifications.
• The LM2853MH-3.3/NOPB is actively manufactured and stocked, ensuring long-term availability and supply chain continuity.
• Both parts share identical electrical performance characteristics, thermal ratings, and package footprints, enabling direct PCB-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can LM2853MH-3.3/NOPB be used as a direct replacement for LM2853MH-3.3?

A: Yes. Both parts are electrically and mechanically identical. The LM2853MH-3.3/NOPB features ROHS3 compliance and active product status, making it the preferred choice for new designs and ongoing procurement.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix denotes a lead-free (no-lead) package configuration that meets RoHS3 compliance requirements. This affects material composition but not electrical performance or package dimensions.

Q: Are there any PCB layout considerations when substituting these parts?

A: No. Both parts use the identical 14-PowerTSSOP package with 0.173" width and 4.40mm dimensions. PCB footprints, trace routing, and component placement remain unchanged.

Q: Why is the original LM2853MH-3.3 listed as obsolete?

A: The original part has been superseded by the RoHS3-compliant LM2853MH-3.3/NOPB variant. Texas Instruments has transitioned manufacturing to the compliant version to meet regulatory standards.

Q: Do both parts have the same thermal and electrical performance?

A: Yes. Operating temperature range (-40°C to 125°C), output current (3A), switching frequency (550kHz), and all electrical characteristics are identical between both parts.