FDMF5833-F085 Equivalent & Substitute Parts

Part Overview

The FDMF5833-F085 is a half bridge driver IC manufactured by onsemi, designed for synchronous buck converter applications. This device integrates UMOS technology with a 50A output capability and operates across a 4.5V to 5.5V supply range. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Substitute parts must maintain functional equivalence in half bridge driver topology while meeting the electrical and mechanical requirements of the original application.

Substiute Parts

FDMF5833-F085

onsemiIn Stock: 23370FDMF5833-F085 Datasheet

Current PartRFQ

NCV3025833MTW

onsemiIn Stock: 1182NCV3025833MTW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDMF5833-F085 is based on the following critical parameters that define functional equivalence:

Core Functional Requirements:

• Output configuration: Half bridge topology
• Current rating: 50A output per channel
• Supply voltage range: 4.5V ~ 5.5V
• Load voltage range: 4.5V ~ 24V
• Operating temperature range: -40°C ~ 150°C (TJ)
• Mounting type: Surface mount
• Load type compatibility: Inductive applications

Mechanical Compatibility:

• Package family: PowerWFQFN or equivalent surface mount QFN
• Pin count and footprint: 31-pin or compatible pin configuration

The NCV3025833MTW qualifies as a substitute based on matching these core parameters while operating in the same application space (DC-DC converters and synchronous buck topologies).

Parameter Comparison

Engineering Selection Recommendations

The NCV3025833MTW is the manufacturer-recommended substitute for the obsolete FDMF5833-F085. Selection is justified on the following basis:

Electrical Compatibility: Both devices maintain identical supply voltage (4.5V ~ 5.5V), load voltage (4.5V ~ 24V), output current (50A), and operating temperature range (-40°C ~ 150°C TJ). The half bridge output configuration and inductive load capability are preserved.

Product Status: The FDMF5833-F085 is obsolete, while the NCV3025833MTW is active and in production. This ensures long-term availability and supply chain continuity.

Compliance & Certification: The NCV3025833MTW carries AEC-Q100 automotive qualification and meets ROHS3 compliance requirements, providing enhanced reliability documentation for regulated applications.

Package Considerations: The substitute uses a 33-pin PowerWFQFN package versus the original 31-pin configuration. Both packages share the same 5x5mm footprint and surface mount technology. PCB layout modifications may be required to accommodate the additional pins; refer to device datasheets for pinout and footprint specifications.

Enhanced Features: The NCV3025833MTW includes additional fault protection mechanisms (ESD, Shoot Through) and diode emulation capability, providing improved robustness over the original design.

Frequently Asked Questions (FAQ)

Q: Can the NCV3025833MTW be used as a direct pin-for-pin replacement?

A: No. While both devices are 5x5mm PowerWFQFN packages, the pin counts differ (31 vs. 33 pins). PCB layout and schematic modifications are required. Consult the device datasheets for detailed pinout comparison and footprint requirements.

Q: Are the electrical specifications identical between FDMF5833-F085 and NCV3025833MTW?

A: Core electrical specifications match: 50A output current, 4.5V ~ 5.5V supply, 4.5V ~ 24V load voltage, and -40°C ~ 150°C operating range. The NCV3025833MTW uses NMOS technology versus UMOS in the original, and Rds On values are not specified for the substitute. Verify on-resistance characteristics against your application requirements using the NCV3025833MTW datasheet.

Q: What is the impact of the additional fault protection features in the NCV3025833MTW?

A: The substitute includes ESD and shoot-through protection not present in the original FDMF5833-F085. These features enhance system reliability and do not negatively impact compatibility with existing synchronous buck converter designs.

Q: Is the NCV3025833MTW suitable for automotive applications?

A: Yes. The NCV3025833MTW carries AEC-Q100 qualification, making it suitable for automotive-grade applications. The original FDMF5833-F085 does not specify automotive qualification.

Q: What are the supply chain implications of using the substitute?

A: The FDMF5833-F085 is obsolete with no ongoing production. The NCV3025833MTW is active and in production, ensuring availability for new designs and production continuity. Existing inventory of the original part should be managed according to your supply chain strategy.