FDMF5833 Half Bridge Driver - Equivalent & Substitute Parts

Part Overview

The FDMF5833 is a half bridge driver IC designed for synchronous buck converter applications. Manufactured by onsemi, this component integrates UMOS technology with integrated gate drive functionality, supporting 50A output current per channel. The device features bootstrap circuit capability, latch function, and comprehensive fault protection including over-temperature and UVLO monitoring.

The FDMF5833 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure supply chain availability for new production runs and legacy system support.

Substiute Parts

FDMF5833

onsemiIn Stock: 2215FDMF5833 Datasheet

Current PartRFQ

FDMF5833-F085

onsemiIn Stock: 23370FDMF5833-F085 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FDMF5833 is determined by strict equivalence across the following critical parameters:

• Output Configuration: Half Bridge topology
• Current Rating: 50A per channel
• Supply Voltage Range: 4.5V ~ 5.5V
• Load Voltage Range: 4.5V ~ 24V
• On-Resistance Characteristics: 470mOhm LS, 680mOhm HS
• Package Type: 31-PowerWFQFN (5x5)
• Mounting: Surface Mount
• Fault Protection: Over Temperature and UVLO capability
• Interface: PWM control

The FDMF5833-F085 meets all substitution criteria as a direct equivalent, differing only in packaging format (Cut Tape versus standard packaging) and the addition of a specified 7A peak output current parameter.

Parameter Comparison

Engineering Selection Recommendations

The FDMF5833-F085 is a direct functional equivalent to the FDMF5833. Both parts share identical electrical specifications, thermal ratings, and fault protection mechanisms. The primary distinction is packaging format: FDMF5833-F085 is supplied in Cut Tape format, which may be advantageous for high-volume automated assembly processes.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring compatibility with standard manufacturing and storage protocols. The FDMF5833-F085 offers significantly higher inventory availability (23,300 units versus 2,145 units), supporting supply chain continuity for production requirements.

Selection between these parts should be based on packaging requirements and procurement lead times rather than electrical performance, as they are electrically and thermally equivalent.

Frequently Asked Questions (FAQ)

Q: Can FDMF5833-F085 be used as a direct replacement for FDMF5833 in existing designs?

A: Yes. The FDMF5833-F085 is electrically and thermally equivalent to the FDMF5833. Both parts feature identical output current ratings (50A), supply voltage range (4.5V ~ 5.5V), load voltage range (4.5V ~ 24V), on-resistance characteristics, and fault protection mechanisms. The difference is packaging format only.

Q: What is the significance of the Cut Tape packaging for FDMF5833-F085?

A: Cut Tape (CT) packaging is a standard format for automated pick-and-place assembly equipment. This format is suitable for high-volume production environments where components are fed directly into surface mount assembly machines. Standard packaging may be used for manual assembly or lower-volume applications.

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

A: No. Both parts operate across the same temperature range (-40°C ~ 150°C junction temperature) and share identical on-resistance specifications. Thermal performance and reliability characteristics are equivalent.

Q: Do both parts support the same PWM interface and control requirements?

A: Yes. Both FDMF5833 and FDMF5833-F085 use PWM interface control and feature identical bootstrap circuit, latch function, and status flag capabilities. Gate drive timing and control logic are identical.

Q: What is the significance of the 7A peak output current specification for FDMF5833-F085?

A: The 7A peak output current parameter is specified for FDMF5833-F085 but not explicitly listed for FDMF5833. This represents a documented transient current capability. Both parts maintain the same 50A continuous output current rating per channel.

Q: Are both parts suitable for synchronous buck converter applications?

A: Yes. Both FDMF5833 and FDMF5833-F085 are designed specifically for synchronous buck converter applications and feature all necessary integration including bootstrap circuit, gate drive functionality, and comprehensive fault protection.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Both maintain MSL 1 (unlimited) moisture sensitivity rating, indicating no special storage or handling requirements beyond standard component handling practices.