LM5033MM Equivalent & Substitute Parts

Part Overview

The LM5033MM is a Full-Bridge, Half-Bridge, Push-Pull Regulator controller IC manufactured by Texas Instruments, designed for positive output step-up/step-down DC-DC conversion applications. This device operates across a 15V to 90V supply voltage range and generates PWM control signals at switching frequencies of 200kHz or 600kHz. The LM5033MM is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. Substitute parts maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Substiute Parts

LM5033MM

Texas InstrumentsIn Stock: 2468LM5033MM Datasheet

Current PartRFQ

LM5033MM/NOPB

Texas InstrumentsIn Stock: 2308LM5033MM/NOPB Datasheet

DirectRFQ

LM5033MMX/NOPB

Texas InstrumentsIn Stock: 4225LM5033MMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM5033MM are classified based on strict equivalence across all electrical and mechanical parameters. The substitution logic is determined by the following criteria:

Direct Manufacturer Equivalent: LM5033MM/NOPB maintains identical electrical specifications, package configuration, and functional characteristics as the main part. This variant differs only in product status (Last Time Buy versus Obsolete) and RoHS compliance certification (ROHS3 Compliant versus RoHS non-compliant).

Parametric Equivalent: LM5033MMX/NOPB provides complete electrical and mechanical compatibility with the main part. All critical parameters—supply voltage range (15V ~ 90V), switching frequencies (200kHz, 600kHz), output configuration, topology, control features, and package dimensions—are identical. This variant offers the most favorable product status (Active) and RoHS3 compliance certification.

All substitute parts share the following key parameters with the main part:

• 10-VSSOP package configuration
• PWM signal output type
• Step-up/step-down function
• Positive output configuration
• Full-Bridge, Half-Bridge, Push-Pull topology
• 2 outputs, 1 phase
• Synchronous rectifier and clock sync capability
• Frequency control and soft start features
• -40°C to 125°C operating temperature range
• Surface mount mounting type
• MSL 1 rating

Parameter Comparison

Engineering Selection Recommendations

For New Designs: LM5033MMX/NOPB is the recommended selection. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. ROHS3 compliance certification aligns with current environmental and regulatory requirements for electronic components. Current inventory of 4200 units supports immediate procurement needs.

For Legacy System Support: LM5033MM/NOPB provides direct compatibility with existing designs while offering improved compliance status. This part is designated Last Time Buy, indicating a defined procurement window before discontinuation. ROHS3 compliance enables compliance with modern supply chain requirements. Inventory of 2290 units is available.

End-of-Life Transition: The original LM5033MM (Obsolete status, 2450 units in stock) should be phased out in favor of LM5033MMX/NOPB to ensure design continuity and regulatory compliance. All three variants are electrically and mechanically interchangeable without circuit modification.

Frequently Asked Questions (FAQ)

Q: Are LM5033MM, LM5033MM/NOPB, and LM5033MMX/NOPB pin-for-pin compatible?

A: Yes. All three parts use the 10-VSSOP package with identical pin assignments, electrical characteristics, and functional behavior. Direct substitution is possible without PCB redesign.

Q: What is the difference between these part numbers?

A: The differences are limited to product status and compliance certifications. LM5033MM is obsolete with RoHS non-compliant status. LM5033MM/NOPB is Last Time Buy with ROHS3 compliance. LM5033MMX/NOPB is Active with ROHS3 compliance. All three deliver identical electrical performance and functionality.

Q: Can I use LM5033MMX/NOPB as a direct replacement in existing designs?

A: Yes. LM5033MMX/NOPB is a parametric equivalent with identical electrical specifications, package configuration, and control features. No circuit modifications are required.

Q: Why should I transition from LM5033MM to LM5033MMX/NOPB?

A: LM5033MM is obsolete, creating long-term supply and support risks. LM5033MMX/NOPB offers active product status, ensuring continued availability, technical support, and compliance with current regulatory standards. ROHS3 certification is required by many supply chain and environmental regulations.

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

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

Q: What is the MSL rating for these parts?

A: All three variants carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.