LT3748MPMS#TR Equivalent & Substitute Parts

Part Overview

The LT3748MPMS#TR 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 part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

LT3748MPMS#TR

Analog Devices Inc.In Stock: 1171LT3748MPMS#TR Datasheet

Current PartRFQ

LT3748MPMS#TRPBF

Analog Devices Inc.In Stock: 1195LT3748MPMS#TRPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Topology & Function: The substitute must maintain Flyback topology with step-up/step-down DC-DC controller functionality.

Output Configuration: The substitute must provide positive, isolation-capable output configuration with single output and single phase operation.

Electrical Specifications: The substitute must support the same supply voltage range (5V ~ 100V) and operating temperature range (-55°C ~ 150°C).

Control Architecture: The substitute must include enable and soft start control features with transistor driver output type.

Physical Form Factor: The substitute must use identical 16-TFSOP surface mount packaging with 12 leads and 3.00mm width.

Base Product Lineage: Substitutes must share the LT3748 base product number designation.

The LT3748MPMS#TRPBF meets all substitution criteria as a direct equivalent with identical electrical and mechanical specifications, differentiated only by packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The LT3748MPMS#TRPBF is the direct functional equivalent of the LT3748MPMS#TR. Both devices are identical in electrical performance, control architecture, and physical form factor. The primary distinction is product lifecycle status: the original part is obsolete while the substitute is active in production.

Selection of the LT3748MPMS#TRPBF is appropriate for new designs and ongoing production requirements. The substitute carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic components in regulated markets. The packaging format difference (Tape & Reel vs. standard packaging) does not affect electrical or mechanical compatibility and is determined by procurement and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Are the LT3748MPMS#TR and LT3748MPMS#TRPBF electrically identical?

A: Yes. Both devices share identical electrical specifications, including supply voltage range (5V ~ 100V), operating temperature range (-55°C ~ 150°C), control features (Enable, Soft Start), and output configuration (Positive, Isolation Capable). The devices are functionally interchangeable at the circuit level.

Q: What is the difference between these two part numbers?

A: The primary difference is packaging format and product status. The LT3748MPMS#TR is obsolete, while the LT3748MPMS#TRPBF is active production. The #TRPBF designation indicates Tape & Reel packaging with lead-free (PbF) termination. Both use the same 16-TFSOP physical package.

Q: Can I use the LT3748MPMS#TRPBF as a direct replacement in existing designs?

A: Yes. The LT3748MPMS#TRPBF is a direct substitute with identical pin configuration, electrical performance, and mechanical form factor. No circuit modifications are required.

Q: Does the packaging format affect circuit performance?

A: No. Packaging format (Tape & Reel vs. standard) is a supply and assembly consideration only. It does not affect electrical characteristics, thermal performance, or functional behavior of the device.

Q: What compliance certifications does the substitute part carry?

A: The LT3748MPMS#TRPBF is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

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

A: No. Both devices operate across the same temperature range (-55°C ~ 150°C) and carry identical Moisture Sensitivity Level (MSL 1 - Unlimited), indicating equivalent thermal and reliability characteristics.

Q: What is the lead-free (PbF) designation in the part number?

A: The #TRPBF suffix indicates lead-free solder termination, compliant with ROHS3 regulations. This is a manufacturing process specification that does not affect electrical performance or compatibility.