MP3388DR-LF-Z Equivalent & Substitute Parts

Part Overview

The MP3388DR-LF-Z is an LED Driver IC manufactured by Monolithic Power Systems Inc., designed for backlight applications requiring an 8-output DC-DC regulator with step-up (boost) topology and PWM dimming capability. This component integrates an internal switch and delivers 20mA per channel output at up to 50V, operating from a 4.5V to 25V supply input.

The MP3388DR-LF-Z carries a "Not For New Designs" product status, indicating it has been superseded or is in end-of-life phase. Identifying equivalent substitute parts is essential for design continuity, procurement flexibility, and long-term product support.

Substiute Parts

MP3388DR-LF-Z

Monolithic Power Systems Inc.In Stock: 55299MP3388DR-LF-Z Datasheet

Current PartRFQ

MP3388SGR-Z

Monolithic Power Systems Inc.In Stock: 75192MP3388SGR-Z Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3388DR-LF-Z is determined by strict alignment of the following critical parameters:

• Topology & Architecture: Step-up (boost) DC-DC regulator with 8 outputs
• Output Specifications: 50V output voltage, 20mA per channel current rating
• Input Supply Range: 4.5V minimum to 25V maximum
• Switching Frequency: 1.25MHz
• Dimming Capability: PWM dimming support
• Package Format: 24-VFQFN Exposed Pad (4x4)
• Compliance: ROHS3 compliant, MSL 1 rating

The MP3388SGR-Z qualifies as a direct substitute based on identical topology, output configuration, frequency, dimming method, and package specification. Variations in minimum supply voltage (4.3V vs. 4.5V) and operating temperature range represent functional improvements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The MP3388SGR-Z is the direct equivalent substitute for the MP3388DR-LF-Z. Both components share identical core specifications across topology, output configuration, frequency, and package format. The MP3388SGR-Z carries an "Active" product status, ensuring ongoing manufacturer support and availability, whereas the MP3388DR-LF-Z is designated "Not For New Designs."

The MP3388SGR-Z offers functional improvements: a lower minimum supply voltage (4.3V vs. 4.5V) and an extended operating temperature range (up to 125°C junction temperature vs. 85°C ambient). Both parts maintain ROHS3 compliance and MSL 1 rating, confirming equivalent environmental and reliability characteristics.

For new designs or production transitions, the MP3388SGR-Z is the recommended selection. For existing designs currently using the MP3388DR-LF-Z, direct substitution with the MP3388SGR-Z is electrically and mechanically compatible.

Frequently Asked Questions (FAQ)

Q: Can the MP3388SGR-Z directly replace the MP3388DR-LF-Z in existing designs?

A: Yes. Both parts are identical in topology, output configuration, switching frequency, dimming capability, and package format. The MP3388SGR-Z is pin-compatible and functionally equivalent.

Q: What is the significance of the "Not For New Designs" status on the MP3388DR-LF-Z?

A: This designation indicates the part has been superseded or is in end-of-life phase. Monolithic Power Systems Inc. recommends using the MP3388SGR-Z for new development to ensure long-term availability and manufacturer support.

Q: Are there differences in supply voltage requirements between these parts?

A: The MP3388SGR-Z accepts a minimum supply voltage of 4.3V, compared to 4.5V for the MP3388DR-LF-Z. This represents a functional improvement and does not create compatibility issues in designs operating within the 4.5V to 25V range.

Q: How do the operating temperature ranges differ?

A: The MP3388DR-LF-Z operates from -40°C to 85°C (ambient temperature). The MP3388SGR-Z operates from -40°C to 125°C (junction temperature). The MP3388SGR-Z provides a wider thermal operating window, beneficial for high-temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the MP3388DR-LF-Z and MP3388SGR-Z are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the difference between the packaging formats listed?

A: The MP3388DR-LF-Z is supplied in bulk packaging, while the MP3388SGR-Z is supplied in Tape & Reel (TR) format. Both use the identical 24-VFQFN Exposed Pad (4x4) package. Tape & Reel format is standard for automated assembly processes.