FDMF6704V Equivalent & Substitute Parts

Part Overview

The FDMF6704V is a half bridge driver IC designed for synchronous buck converter applications. Manufactured by onsemi, this DrMOS device integrates gate driver functionality with power switches in a 40-MLP package. The part is currently in Last Time Buy status, making identification of equivalent alternatives essential for design continuity and long-term supply chain planning. Substitute parts must maintain identical electrical performance and mechanical compatibility across critical parameters including output current rating, voltage specifications, and thermal operating range.

Substiute Parts

FDMF6704V

onsemiIn Stock: 6178FDMF6704V Datasheet

Current PartRFQ

FDMF6704V

Fairchild SemiconductorIn Stock: 6195FDMF6704V Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FDMF6704V is determined by strict alignment across the following critical parameters:

Electrical Compatibility Requirements:

• Output configuration must be Half Bridge
• Current rating (output/channel) must be 35A minimum
• Peak output current must be 80A minimum
• Supply voltage range must encompass 8V ~ 14V
• Load voltage range must encompass 3V ~ 14V
• Operating temperature range must cover -55°C ~ 150°C (TJ)
• Interface type must be PWM
• Load type must be Inductive
• Technology must be DrMOS-based

Mechanical Compatibility Requirements:

• Package must be 40-WFQFN Exposed Pad (40-MLP 6x6)
• Mounting type must be Surface Mount

Functional Requirements:

• Bootstrap circuit functionality required
• Fault protection must include Shoot-Through and UVLO protection

Parts meeting all these criteria are considered direct functional equivalents suitable for design substitution.

Parameter Comparison

Engineering Selection Recommendations

The FDMF6704V from Fairchild Semiconductor is a direct functional equivalent to the onsemi FDMF6704V. Both parts share identical electrical specifications, thermal ratings, and mechanical packaging. The primary distinction is product status: the onsemi version is in Last Time Buy status, while the Fairchild Semiconductor variant is Active.

For new designs or long-term production requirements, the Fairchild Semiconductor FDMF6704V is the appropriate selection due to its Active product status, ensuring continued availability and supply chain stability. The onsemi version should be reserved for existing designs requiring component-level compatibility or where Last Time Buy inventory is available for legacy production runs.

Both parts comply with RoHS requirements and are suitable for synchronous buck converter applications requiring 35A continuous output current and 80A peak current capability across the specified voltage and temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can the Fairchild Semiconductor FDMF6704V directly replace the onsemi FDMF6704V in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The 40-WFQFN Exposed Pad package, pin configuration, and electrical characteristics are equivalent. Substitution requires no circuit modifications.

Q: What is the significance of the Last Time Buy status on the onsemi version?

A: Last Time Buy status indicates that onsemi will discontinue this part number. Existing inventory may be available for a limited period. For new designs or long-term production, the Active Fairchild Semiconductor variant should be selected to ensure ongoing supply availability.

Q: Are there packaging format differences between the two parts?

A: Yes. The onsemi version is supplied in Tape & Reel (TR) format, while the Fairchild Semiconductor version is supplied in Bulk format. Both use the same 40-MLP (6x6) package. Packaging format selection depends on production volume and assembly requirements.

Q: What are the critical parameters that define substitution eligibility for this part?

A: Substitution eligibility is determined by: half bridge output configuration, 35A continuous current rating, 80A peak current capability, 8V–14V supply voltage range, 3V–14V load voltage range, -55°C to 150°C operating temperature, PWM interface, DrMOS technology, 40-WFQFN package, and integrated shoot-through and UVLO protection.

Q: Are both parts RoHS compliant?

A: The onsemi FDMF6704V is explicitly ROHS3 compliant. RoHS compliance status for the Fairchild Semiconductor variant is not specified in the provided data.