LT3758MPMSE Equivalent & Substitute Parts

Part Overview

The LT3758MPMSE is a Boost, Flyback, and SEPIC regulator controller IC manufactured by Analog Devices Inc., designed for positive or negative output configurations with isolation capability. This device functions as a Step-Up and Step-Up/Step-Down DC-DC controller with transistor driver output, operating across a supply voltage range of 5.5V to 100V and switching frequencies from 100kHz to 1MHz.

The LT3758MPMSE is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this controller topology.

Substiute Parts

LT3758MPMSE

Analog Devices Inc.In Stock: 1040LT3758MPMSE Datasheet

Current PartRFQ

LT3758MPMSE#PBF

Analog Devices Inc.In Stock: 1572LT3758MPMSE#PBF Datasheet

DirectRFQ

LT3758AMPMSE#PBF

Analog Devices Inc.In Stock: 936LT3758AMPMSE#PBF Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LT3758MPMSE are identified based on electrical and mechanical parameter equivalence within the LT3758 product family. Substitution is valid when the following criteria are met:

Critical Substitution Parameters:

• Identical topology (Boost, Flyback, SEPIC)
• Identical output type (Transistor Driver)
• Identical function (Step-Up, Step-Up/Step-Down)
• Identical output configuration (Positive or Negative, Isolation Capable)
• Identical supply voltage range (5.5V ~ 100V)
• Identical switching frequency range (100kHz ~ 1MHz)
• Identical control features (Enable, Frequency Control, Soft Start)
• Identical operating temperature range (-55°C ~ 150°C)
• Identical package type (10-MSOP-EP)
• Identical base product number (LT3758)

The substitute parts listed below meet all electrical and mechanical parameter requirements for direct substitution with the main part number LT3758MPMSE.

Parameter Comparison

Engineering Selection Recommendations

LT3758MPMSE#PBF is the direct substitute for the obsolete LT3758MPMSE. This part maintains identical electrical and mechanical specifications while offering active product status. The #PBF suffix indicates lead-free (RoHS3 compliant) construction and tube packaging. This part is suitable for new designs and ongoing production requiring the LT3758 controller topology.

LT3758AMPMSE#PBF is a parametric equivalent within the LT3758 family. This part shares all critical electrical and mechanical parameters with the main part number and is also active with RoHS3 compliance and REACH unaffected status. The "A" grade designation indicates this variant meets the same functional specifications and is interchangeable for applications requiring the LT3758 Boost, Flyback, or SEPIC controller functionality.

Both substitute parts are ROHS3 compliant and REACH unaffected, supporting compliance requirements for modern electronic applications. Selection between LT3758MPMSE#PBF and LT3758AMPMSE#PBF should be based on availability, inventory levels, and specific design qualification requirements, as both parts are electrically and mechanically equivalent.

Frequently Asked Questions (FAQ)

Q: Can LT3758MPMSE#PBF be used as a direct replacement for LT3758MPMSE?

A: Yes. LT3758MPMSE#PBF is a direct substitute with identical electrical and mechanical parameters. The primary differences are product status (Active vs. Obsolete), packaging format (Tube), and compliance certifications (ROHS3 Compliant, REACH Unaffected). All functional specifications, including topology, output type, supply voltage range, switching frequency, and control features, are identical.

Q: What is the difference between LT3758MPMSE#PBF and LT3758AMPMSE#PBF?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The "A" grade designation in LT3758AMPMSE#PBF indicates a variant within the LT3758 family. Both parts are active, ROHS3 compliant, and REACH unaffected. Selection should be based on availability and design qualification requirements.

Q: Are the package dimensions identical across all three part numbers?

A: Yes. All three part numbers use the 10-MSOP-EP package with dimensions of 0.118" width and 3.00mm height with exposed pad. The package footprint and pinout are identical, enabling direct PCB-level substitution.

Q: Why is the original LT3758MPMSE marked as obsolete?

A: The LT3758MPMSE is classified as obsolete, indicating it is no longer in active production. LT3758MPMSE#PBF and LT3758AMPMSE#PBF are active alternatives that provide equivalent functionality with modern compliance certifications.

Q: Do the substitute parts support the same topologies and control features?

A: Yes. All three part numbers support identical topologies (Boost, Flyback, SEPIC), output configurations (Positive or Negative, Isolation Capable), and control features (Enable, Frequency Control, Soft Start). Operating temperature range (-55°C ~ 150°C) and supply voltage range (5.5V ~ 100V) are also identical.

Q: What compliance certifications apply to the substitute parts?

A: LT3758MPMSE#PBF and LT3758AMPMSE#PBF are both ROHS3 compliant and REACH unaffected. These certifications support compliance with modern environmental and regulatory requirements for electronic components.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. LT3758MPMSE#PBF and LT3758AMPMSE#PBF are electrically and mechanically equivalent to LT3758MPMSE and can be used interchangeably in existing designs without circuit modifications. The 10-MSOP-EP package, pinout, and functional specifications are identical across all three part numbers.