LT3748MPMS Equivalent & Substitute Parts

Part Overview

The LT3748MPMS is a Flyback Regulator controller IC manufactured by Analog Devices Inc., designed for positive, isolation-capable output step-up/step-down DC-DC conversion applications. This device functions as a transistor driver with integrated enable and soft start control features, operating across a supply voltage range of 5V to 100V.

The LT3748MPMS is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for legacy systems utilizing this controller topology.

Substiute Parts

LT3748MPMS

Analog Devices Inc.In Stock: 653LT3748MPMS Datasheet

Current PartRFQ

LT3748MPMS#PBF

Analog Devices Inc.In Stock: 1309LT3748MPMS#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LT3748MPMS is determined by strict equivalence across the following critical parameters:

Topology & Function: The substitute part must implement flyback regulation with step-up/step-down capability and positive, isolation-capable output configuration.

Electrical Specifications: Supply voltage range (5V ~ 100V), output type (transistor driver), control features (enable, soft start), and operating temperature range (-55°C ~ 150°C) must be identical.

Physical Compatibility: The substitute must utilize the same 16-TFSOP package with 12 leads and 3.00mm width to ensure PCB layout compatibility.

Manufacturer Consistency: Parts from Analog Devices Inc. maintain design and performance continuity within the LT3748 base product family.

The LT3748MPMS#PBF qualifies as a direct substitute based on complete parameter alignment across all specified electrical and mechanical criteria.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LT3748MPMS#PBF

The LT3748MPMS#PBF is the direct equivalent substitute for the obsolete LT3748MPMS. Both parts share identical electrical specifications, package configuration, and functional characteristics across all critical parameters.

Product Status Advantage: The LT3748MPMS#PBF maintains active product status with Analog Devices Inc., ensuring continued availability and technical support. The original LT3748MPMS is classified as obsolete, making the #PBF variant the recommended selection for new procurement and ongoing supply chain management.

Compliance & Certification: The LT3748MPMS#PBF carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components in industrial and commercial applications. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Packaging Consideration: The LT3748MPMS#PBF is supplied in tube packaging, which is standard for surface mount components and compatible with automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LT3748MPMS#PBF directly replace the LT3748MPMS in existing designs?

A: Yes. The LT3748MPMS#PBF is a direct substitute with identical electrical specifications, package configuration, pin count, and functional characteristics. No design modifications are required for PCB layout or schematic implementation.

Q: What is the primary difference between LT3748MPMS and LT3748MPMS#PBF?

A: The LT3748MPMS is classified as obsolete, while the LT3748MPMS#PBF maintains active product status. The #PBF designation indicates lead-free (Pb-free) compliance and ROHS3 certification. Both parts are electrically and mechanically identical.

Q: Are there any compatibility concerns with the 16-TFSOP package?

A: No. Both parts utilize the identical 16-TFSOP package with 12 leads and 3.00mm width. PCB footprints, land patterns, and assembly processes remain unchanged.

Q: Does the LT3748MPMS#PBF support the same supply voltage range?

A: Yes. The LT3748MPMS#PBF operates across the identical 5V to 100V supply voltage range as the original LT3748MPMS, maintaining full functional compatibility in flyback regulator applications.

Q: What is the significance of the MSL rating for these parts?

A: Both the LT3748MPMS and LT3748MPMS#PBF carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly.

Q: Are regulatory certifications identical between the two parts?

A: Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The LT3748MPMS#PBF additionally carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory standards.