LM5033MMX Equivalent & Substitute Parts

Part Overview

The LM5033MMX is a Full-Bridge, Half-Bridge, and Push-Pull Regulator controller IC manufactured by Texas Instruments, designed for positive output step-up/step-down DC-DC conversion applications. This PWM signal-based controller operates across a 15V to 90V supply voltage range with selectable switching frequencies of 200kHz or 600kHz, incorporating synchronous rectifier support and clock synchronization capabilities.

The LM5033MMX is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this controller.

Substiute Parts

LM5033MMX

Texas InstrumentsIn Stock: 3082LM5033MMX Datasheet

Current PartRFQ

LM5033MM/NOPB

Texas InstrumentsIn Stock: 2308LM5033MM/NOPB Datasheet

Parametric EquivalentRFQ

LM5033MMX/NOPB

Texas InstrumentsIn Stock: 4225LM5033MMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5033MMX are identified based on strict parametric equivalence across all electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Output Type: PWM Signal
• Function: Step-Up/Step-Down
• Output Configuration: Positive
• Topology: Full-Bridge, Half-Bridge, Push-Pull
• Number of Outputs: 2
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 15V ~ 90V
• Frequency - Switching: 200kHz, 600kHz
• Synchronous Rectifier: Yes
• Clock Sync: Yes
• Control Features: Frequency Control, Soft Start
• Operating Temperature: -40°C ~ 125°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Supplier Device Package: 10-VSSOP

All identified substitute parts maintain complete parametric compatibility with the LM5033MMX across these critical specifications.

Parameter Comparison

Engineering Selection Recommendations

Selection between LM5033MMX and its substitute parts should be based on product status, regulatory compliance, and supply availability:

LM5033MMX (Obsolete, RoHS non-compliant): This part is classified as obsolete and does not meet ROHS3 compliance requirements. Use only when existing inventory must be consumed or when legacy system maintenance requires exact part matching.

LM5033MM/NOPB (Last Time Buy, ROHS3 Compliant): This part is in Last Time Buy status and meets ROHS3 compliance standards. It is suitable for designs requiring regulatory compliance and represents a transitional option with limited future availability.

LM5033MMX/NOPB (Active, ROHS3 Compliant): This part maintains Active product status and full ROHS3 compliance. It is the preferred selection for new designs, production continuity, and long-term supply chain reliability. Highest inventory availability supports sustained production requirements.

All three parts maintain identical electrical and mechanical parameters, ensuring direct functional interchangeability within the specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can LM5033MMX be directly replaced with LM5033MM/NOPB or LM5033MMX/NOPB?

A: Yes. All three parts are parametrically equivalent across all electrical specifications, control features, operating temperature range, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between LM5033MMX and LM5033MMX/NOPB?

A: The primary differences are product status and regulatory compliance. LM5033MMX is obsolete and RoHS non-compliant. LM5033MMX/NOPB is an active product with ROHS3 compliance. Both share identical electrical and mechanical specifications.

Q: Why is packaging listed as both bulk and Tape & Reel?

A: The LM5033MMX is supplied in bulk packaging, while LM5033MM/NOPB and LM5033MMX/NOPB are supplied in Tape & Reel format. Both packaging formats contain the same die and are functionally equivalent. Tape & Reel packaging is standard for automated assembly processes.

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

A: No. All three parts operate across the identical temperature range (-40°C to 125°C junction temperature) and maintain the same switching frequency options (200kHz, 600kHz), control features, and output specifications.

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

A: LM5033MMX/NOPB is the recommended selection for new designs. It maintains Active product status, ROHS3 compliance, and the highest inventory availability, ensuring long-term supply chain support and regulatory alignment.

Q: Is the 10-VSSOP package compatible with 10-TFSOP and 10-MSOP footprints?

A: The supplier device package is specified as 10-VSSOP for all three parts. The package case designation includes both 10-TFSOP and 10-MSOP references, indicating compatible footprint options. Verify PCB layout compatibility with the specific package variant being used.