MP8042DF-LF-P Equivalent & Substitute Parts

Part Overview

The MP8042DF-LF-P is a half bridge driver IC manufactured by Monolithic Power Systems Inc., designed for general purpose power MOSFET applications. This device features PWM interface control, inductive load capability, and integrated fault protection including current limiting, over-temperature, and UVLO functions. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MP8042DF-LF-P

Monolithic Power Systems Inc.In Stock: 790MP8042DF-LF-P Datasheet

Current PartRFQ

MP8046DF-LF-P

Monolithic Power Systems Inc.In Stock: 1129MP8046DF-LF-P Datasheet

DirectRFQ

MP8046DF-LF-Z

Monolithic Power Systems Inc.In Stock: 25112MP8046DF-LF-Z Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP8042DF-LF-P is determined by the following critical parameters:

Primary Compatibility Criteria:

• Output configuration: Half Bridge (2) driver topology
• Interface type: PWM control
• Load type: Inductive load support
• Technology: Power MOSFET driver
• Package: 20-TSSOP with exposed pad
• Peak output current: 5A minimum
• Supply voltage range: Minimum 7.5V ~ 24V overlap
• Load voltage range: Minimum 7.5V ~ 24V overlap
• Operating temperature: -40°C ~ 125°C (TJ)
• Fault protection: Current limiting, over-temperature, UVLO
• Mounting: Surface mount

Identified Substitutes:

MP8046DF-LF-P qualifies as a direct substitute. This part maintains identical output configuration, interface, load type, technology, package, peak current rating, and fault protection features. The supply voltage range extends to 28V, providing broader application coverage. The load voltage range similarly extends to 28V. RDS(on) specification differs slightly (165mOhm vs. 150mOhm), remaining within acceptable driver performance parameters.

MP8046DF-LF-Z does not qualify as a functional substitute. Although packaged identically in 20-TSSOP format, this part is classified as a Class D stereo amplifier IC rather than a half bridge driver. The functional category, output configuration, and application domain differ fundamentally from the MP8042DF-LF-P.

Parameter Comparison

Engineering Selection Recommendations

The MP8046DF-LF-P is the qualified substitute for the obsolete MP8042DF-LF-P. Both parts are manufactured by Monolithic Power Systems Inc. and maintain identical functional specifications for half bridge driver applications. The MP8046DF-LF-P carries active product status, ensuring ongoing availability and manufacturer support. Both parts comply with ROHS3 requirements and carry identical MSL ratings.

The extended supply and load voltage ranges of the MP8046DF-LF-P (7.5V ~ 28V versus 7.5V ~ 24V) provide design flexibility for applications operating at higher voltage levels while remaining fully compatible with designs specified for the original MP8042DF-LF-P voltage envelope.

The MP8046DF-LF-Z must not be used as a substitute. Despite identical packaging, this component functions as a Class D stereo amplifier and lacks the half bridge driver topology, PWM interface, and inductive load handling required for power management applications.

Frequently Asked Questions (FAQ)

Q: Can MP8046DF-LF-P directly replace MP8042DF-LF-P in existing designs?

A: Yes. The MP8046DF-LF-P maintains identical half bridge driver functionality, PWM interface, peak output current (5A), operating temperature range (-40°C ~ 125°C), fault protection features, and 20-TSSOP package configuration. The extended voltage ranges do not create compatibility issues for designs operating within the original 7.5V ~ 24V specification.

Q: What is the significance of the RDS(on) difference between MP8042DF-LF-P (150mOhm) and MP8046DF-LF-P (165mOhm)?

A: The 15mOhm increase in on-resistance remains within acceptable driver performance parameters for general purpose power MOSFET applications. This specification difference does not affect functional compatibility or switching characteristics for inductive load applications.

Q: Why is MP8046DF-LF-Z not a suitable substitute despite identical packaging?

A: MP8046DF-LF-Z is a Class D stereo amplifier IC, not a half bridge driver. The functional category, output configuration, interface type, and application domain are fundamentally different. Packaging similarity does not establish functional equivalence.

Q: Are there packaging or supply chain differences between MP8046DF-LF-P variants?

A: MP8046DF-LF-P is supplied in Tape & Reel (TR) packaging, while the original MP8042DF-LF-P packaging format is not specified. Both parts use identical 20-TSSOP case geometry and exposed pad configuration. Tape & Reel format is standard for surface mount production environments.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both MP8042DF-LF-P and MP8046DF-LF-P are ROHS3 compliant, carry identical MSL ratings (2A, 4 Weeks), and are REACH unaffected. Compliance documentation should be verified with the manufacturer for specific application requirements.