MP3908DK-LF-Z Equivalent & Substitute Parts

Part Overview

The MP3908DK-LF-Z is an active DC-DC controller IC manufactured by Monolithic Power Systems, designed for multi-topology power conversion applications. This component functions as a transistor driver for boost, flyback, forward converter, and SEPIC topologies with positive, isolation-capable output configurations. The part is currently in active production status with 18,434 units available in new original inventory. Substitute parts are identified when electrical specifications, mechanical packaging, and compliance certifications remain identical across manufacturing batches or packaging variants.

Substiute Parts

MP3908DK-LF-Z

Monolithic Power SystemsIn Stock: 18530MP3908DK-LF-Z Datasheet

Current PartRFQ

MP3908DK-LF-P

Monolithic Power Systems Inc.In Stock: 4456MP3908DK-LF-P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3908DK-LF-Z is determined by strict equivalence across the following parameters:

• Voltage supply range: 4.5V ~ 10V
• Switching frequency: 260kHz
• Maximum duty cycle: 81%
• Package type: 10-MSOP
• Output configuration: Positive, Isolation Capable
• Supported topologies: Boost, Flyback, Forward Converter, SEPIC
• Control features: Current Limit, Enable, Soft Start
• Operating temperature range: -40°C ~ 85°C
• RoHS and REACH compliance status
• Moisture sensitivity level: 1 (Unlimited)

The MP3908DK-LF-P qualifies as a parametric equivalent based on identical electrical specifications and mechanical packaging. The difference between these part numbers reflects packaging format variation (Cut Tape with Digi-Reel® versus standard Cut Tape).

Parameter Comparison

Engineering Selection Recommendations

Both MP3908DK-LF-Z and MP3908DK-LF-P maintain active product status with full compliance to ROHS3 and REACH regulations. Selection between these parts should be based on packaging format requirements and inventory availability. The MP3908DK-LF-Z offers higher stock levels at 18,434 units. Both parts carry identical electrical performance specifications and thermal operating ranges suitable for industrial and commercial power conversion applications. Moisture sensitivity level 1 (Unlimited) indicates no special storage or handling requirements for either variant.

Frequently Asked Questions (FAQ)

Q: Are MP3908DK-LF-Z and MP3908DK-LF-P electrically interchangeable?

A: Yes. Both parts share identical electrical specifications including supply voltage range (4.5V ~ 10V), switching frequency (260kHz), duty cycle maximum (81%), and control feature sets. They are functionally equivalent for circuit design purposes.

Q: What is the difference between these part numbers?

A: The difference lies in packaging format. MP3908DK-LF-Z is supplied in Cut Tape with Digi-Reel® packaging, while MP3908DK-LF-P uses standard Cut Tape packaging. The physical component and electrical performance remain identical.

Q: Can I use either part in the same PCB assembly?

A: Yes. Both parts use the 10-MSOP package with identical pin configuration and mechanical dimensions (0.118", 3.00mm Width). Surface mount assembly equipment and PCB layouts require no modification when substituting between these parts.

Q: Are there any compliance differences?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and moisture sensitivity level 1 (Unlimited). Regulatory and environmental certifications are equivalent.

Q: Which part should I select for new designs?

A: Selection should be based on packaging format preference and supply chain availability. Both parts are active products with no planned obsolescence. The MP3908DK-LF-Z offers higher inventory levels.