MP3388EY-LF-Z Equivalent & Substitute Parts

Part Overview

The MP3388EY-LF-Z is an LED Driver IC with 8 outputs, functioning as a DC-DC Step-Up (Boost) regulator with PWM dimming capability. This device is designed for backlight applications and operates across a 4.5V to 25V supply range with a 50V output voltage and 20mA per-channel current rating.

The MP3388EY-LF-Z carries a "Not For New Designs" product status, indicating it is obsolete or being phased out. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this component is currently deployed.

Substiute Parts

MP3388EY-LF-Z

Monolithic Power Systems Inc.In Stock: 3537MP3388EY-LF-Z Datasheet

Current PartRFQ

MP3388SGR-Z

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP3388EY-LF-Z is determined by the following core electrical and mechanical parameters:

• Functional Equivalence: DC-DC Step-Up (Boost) topology with 8 LED driver outputs
• Electrical Compatibility: 4.3V to 25V supply voltage range (minimum overlap with original 4.5V minimum), 50V output voltage, 20mA per-channel current rating, 1.25MHz switching frequency, and PWM dimming capability
• Application Alignment: Backlight LED driver functionality
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status
• Packaging Consideration: Surface mount technology with different package options (28-SOIC vs. 24-QFN)

The MP3388SGR-Z qualifies as a direct substitute based on these parameters, with the primary difference being package form factor and enhanced product status (Active vs. Not For New Designs).

Parameter Comparison

Engineering Selection Recommendations

The MP3388SGR-Z is the manufacturer-recommended substitute for the MP3388EY-LF-Z. Both devices share the same base product number (MP3388) and deliver identical electrical performance across all critical parameters: supply voltage range, output voltage, per-channel current, switching frequency, and PWM dimming functionality.

The MP3388SGR-Z offers several advantages:

• Active Product Status: The substitute is actively supported by the manufacturer, ensuring long-term availability and design continuity.
• Enhanced Operating Temperature Range: Extended temperature specification (-40°C to 125°C junction temperature) provides greater thermal margin compared to the original part (-20°C to 85°C ambient).
• Improved Moisture Handling: MSL 1 rating (unlimited moisture exposure) versus MSL 3 (168 hours) reduces handling and storage constraints.
• Regulatory Alignment: Maintains ROHS3 compliance and REACH unaffected status.

The primary design consideration is package form factor: the substitute uses a 24-QFN (4x4mm) package instead of the 28-SOIC package. PCB layout and footprint modifications are required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the MP3388SGR-Z be used as a direct pin-for-pin replacement?

A: No. While both devices are electrically equivalent, they use different package types (28-SOIC vs. 24-QFN). Pin assignments and physical footprints differ, requiring PCB redesign and layout modifications.

Q: What are the key electrical differences between these parts?

A: There are no functional electrical differences. Both devices operate at 1.25MHz, deliver 20mA per channel across 8 outputs, support 4.3V to 25V input, and produce 50V output with PWM dimming.

Q: Why is the MP3388EY-LF-Z marked "Not For New Designs"?

A: This status indicates the part is obsolete or being phased out by the manufacturer. The MP3388SGR-Z is the active replacement for ongoing production and new designs.

Q: Does the substitute have better temperature performance?

A: Yes. The MP3388SGR-Z operates from -40°C to 125°C (junction temperature) compared to -20°C to 85°C (ambient temperature) for the original part, providing a wider operating range.

Q: What is the impact of the different MSL ratings?

A: The MP3388SGR-Z has MSL 1 (unlimited moisture exposure), while the MP3388EY-LF-Z has MSL 3 (168-hour limit). The substitute requires less stringent moisture control during storage and handling.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the MP3388EY-LF-Z and MP3388SGR-Z are ROHS3 compliant and REACH unaffected.