LM5035MH Half-Bridge DC-DC Controller Equivalent & Substitute Parts

Part Overview

The LM5035MH is a half-bridge regulator controller IC from Texas Instruments designed for positive, isolation-capable step-up/step-down DC-DC conversion applications. This device operates across a wide supply voltage range of 13V to 105V and integrates synchronous rectifier control with frequency synchronization capabilities.

The LM5035MH is currently discontinued at DiGi Electronics, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Direct manufacturer equivalents and parametric alternatives are available to maintain design functionality and performance specifications.

Substiute Parts

LM5035MH

Texas InstrumentsIn Stock: 3970LM5035MH Datasheet

Current PartRFQ

LM5035MH/NOPB

Texas InstrumentsIn Stock: 923LM5035MH/NOPB Datasheet

DirectRFQ

LM5035CMH/NOPB

Texas InstrumentsIn Stock: 1315LM5035CMH/NOPB Datasheet

Parametric EquivalentRFQ

LM5039MH/NOPB

Texas InstrumentsIn Stock: 2806LM5039MH/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM5035MH is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Voltage supply range (13V ~ 105V), switching frequency options (200kHz, 500kHz), output configuration (positive, isolation capable), topology (half-bridge), and control features (frequency control, ramp, soft start).

Physical Parameters: Package type (20-PowerTSSOP), mounting method (surface mount), and mechanical dimensions (0.173", 4.40mm width).

Environmental Parameters: Operating temperature range (-40°C ~ 125°C), moisture sensitivity level (MSL 1), and mechanical compatibility.

All substitute parts listed maintain identical electrical functionality, package compatibility, and thermal specifications. Substitutes are grouped by manufacturer part number designation and product status availability.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent: LM5035MH/NOPB is the direct equivalent with NOPB (No Plumbum/Lead-Free) designation. This part maintains identical electrical and mechanical specifications while offering ROHS3 compliance and Last Time Buy status, providing better long-term availability assurance than the discontinued LM5035MH.

Parametric Equivalents: LM5035CMH/NOPB and LM5039MH/NOPB are parametric equivalents that maintain all critical electrical parameters, switching frequencies, control features, and package compatibility. Both parts are ROHS3 compliant with Last Time Buy status.

Compliance Consideration: All substitute parts are ROHS3 compliant, whereas the original LM5035MH is RoHS non-compliant. For applications requiring RoHS compliance certification, any of the three substitute parts satisfy regulatory requirements.

Inventory Availability: LM5039MH/NOPB offers the highest current inventory (2704 Pcs), followed by LM5035CMH/NOPB (1261 Pcs) and LM5035MH/NOPB (850 Pcs). Selection based on immediate availability requirements should prioritize LM5039MH/NOPB.

Frequently Asked Questions (FAQ)

Q: Can LM5035MH/NOPB be used as a direct replacement for LM5035MH?

A: Yes. LM5035MH/NOPB is the direct manufacturer equivalent with identical electrical specifications, switching frequencies, control features, and 20-PowerTSSOP package. The /NOPB suffix indicates lead-free construction and ROHS3 compliance.

Q: What is the difference between LM5035CMH/NOPB and LM5039MH/NOPB?

A: Both parts are parametric equivalents with identical electrical performance across all specified parameters: 13V ~ 105V supply range, 200kHz/500kHz switching frequencies, half-bridge topology, and synchronous rectifier control. The primary difference is the base product number designation (LM5035 vs. LM5039). Functionally, they are interchangeable for this application.

Q: Are all substitute parts compatible with existing PCB layouts designed for LM5035MH?

A: Yes. All substitute parts use the identical 20-PowerTSSOP package with 0.173" width and 4.40mm dimensions. Pin configuration and mechanical footprint are compatible with existing designs.

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

A: For new designs, LM5035MH/NOPB or LM5035CMH/NOPB are recommended as they maintain the LM5035 base product number lineage. Both are ROHS3 compliant with Last Time Buy status. LM5039MH/NOPB is also acceptable if higher inventory availability is a priority.

Q: Does RoHS compliance affect electrical performance?

A: No. ROHS3 compliance affects material composition (lead-free solder) but does not alter electrical specifications, switching frequencies, control features, or thermal performance. All substitute parts maintain identical functional characteristics.

Q: What is the moisture sensitivity level (MSL) for all parts?

A: All parts, including the original LM5035MH and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.