LTC3404MPMS8 Equivalent & Substitute Parts

Part Overview

The LTC3404MPMS8 is an active, production-status buck switching regulator IC manufactured by Analog Devices Inc. This positive adjustable step-down converter delivers 600mA output current with a fixed input voltage range of 2.65V to 6V and adjustable output voltage from 0.8V to 6V. The device integrates a synchronous rectifier and operates at a switching frequency of 1.4MHz, making it suitable for compact power management applications requiring efficient DC-DC conversion.

Equivalent and substitute parts are identified to address component availability, packaging preferences, and supply chain requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

LTC3404MPMS8

Analog Devices Inc.In Stock: 1044LTC3404MPMS8 Datasheet

Current PartRFQ

LTC3404MPMS8#PBF

Analog Devices Inc.In Stock: 2145LTC3404MPMS8#PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTC3404MPMS8 are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

Electrical Equivalence Requirements:

• Identical buck topology and step-down function
• Matching input voltage range: 2.65V to 6V
• Matching output voltage range: 0.8V to 6V
• Identical output current rating: 600mA
• Identical switching frequency: 1.4MHz
• Synchronous rectifier present
• Matching operating temperature range: -55°C to 125°C

Mechanical Equivalence Requirements:

• Identical package type: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Surface mount mounting type
• Identical supplier device package: 8-MSOP

Compliance Equivalence Requirements:

• ROHS3 Compliant status
• REACH Unaffected status
• Moisture Sensitivity Level 1 (Unlimited)

Parts meeting all three categories are classified as direct substitutes. Packaging format variations (tube versus other formats) do not affect electrical or mechanical compatibility and are noted separately.

Parameter Comparison

Engineering Selection Recommendations

The LTC3404MPMS8#PBF is a direct electrical and mechanical equivalent to the LTC3404MPMS8. Both parts are manufactured by Analog Devices Inc., share identical base product number LTC3404, and maintain active production status. All critical electrical parameters—input voltage range, output voltage range, output current, switching frequency, and synchronous rectifier functionality—are identical across both variants.

Both parts comply with ROHS3 requirements and maintain REACH Unaffected status. Moisture sensitivity classification is identical at MSL Level 1 (Unlimited), indicating no special handling requirements during storage or assembly.

The primary distinction between these parts is packaging format: the LTC3404MPMS8#PBF is supplied in tube packaging, while the LTC3404MPMS8 uses standard packaging. This difference does not affect electrical performance, thermal characteristics, or mechanical fit on printed circuit boards. The #PBF suffix indicates lead-free, RoHS-compliant termination, consistent with both parts' ROHS3 compliance status.

Selection between these variants depends on procurement requirements, inventory management practices, and assembly line handling preferences. Both parts are suitable for direct substitution in applications requiring buck regulation with 600mA output current and adjustable output voltage from 0.8V to 6V.

Frequently Asked Questions (FAQ)

Q: Can LTC3404MPMS8#PBF be used as a direct replacement for LTC3404MPMS8?

A: Yes. Both parts are electrically and mechanically identical. All voltage ratings, current specifications, switching frequency, and package dimensions match exactly. The #PBF designation indicates tube packaging format, which does not affect circuit performance or PCB compatibility.

Q: What does the #PBF suffix mean?

A: The #PBF suffix indicates lead-free, RoHS-compliant termination. Both the LTC3404MPMS8 and LTC3404MPMS8#PBF are ROHS3 compliant, so this designation reflects manufacturing process compliance rather than a functional difference.

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

A: No. Both parts operate across the identical temperature range of -55°C to 125°C. Thermal performance, switching frequency, and output current capability are identical.

Q: What is the significance of the 8-MSOP package designation?

A: The 8-MSOP (8-pin Micro Small Outline Package) is a surface mount package measuring 0.118 inches (3.00mm) in width. This compact form factor is standard for both variants and ensures identical PCB footprint and layout compatibility.

Q: Can these parts be used interchangeably in production?

A: Yes, provided that assembly processes accommodate the packaging format differences. The LTC3404MPMS8#PBF in tube packaging may require different handling or tape-and-reel conversion depending on assembly equipment specifications. Electrical and mechanical performance are identical.

Q: What is MSL Level 1 (Unlimited)?

A: Moisture Sensitivity Level 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. These parts do not require special dry-pack storage, desiccant handling, or bake-out procedures prior to assembly.

Q: Are both parts currently in production?

A: Yes. Both the LTC3404MPMS8 and LTC3404MPMS8#PBF maintain active product status with Analog Devices Inc., ensuring continued availability and support.