MP3427GL-P Equivalent & Substitute Parts

Part Overview

The MP3427GL-P is a boost switching regulator IC manufactured by Monolithic Power Systems, designed for step-up voltage conversion applications. It delivers 17A switch current with adjustable positive output from a 3V to 8V input range, operating at 450kHz to 690kHz switching frequency. The device is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product roadmap. Applications requiring this topology and performance envelope require evaluation of active alternative components to ensure long-term supply chain viability and design continuity.

Substiute Parts

MP3427GL-P

Monolithic Power SystemsIn Stock: 2149MP3427GL-P Datasheet

Current PartRFQ

TPS61088RHLT

Texas InstrumentsIn Stock: 1476TPS61088RHLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP3427GL-P is determined by the following critical parameters:

• Topology: Boost (step-up) switching regulator configuration
• Output Type: Adjustable positive voltage regulation
• Input Voltage Compatibility: Minimum 3V input support
• Output Current Capability: Minimum 17A switch current requirement
• Switching Frequency Range: Operation within 450kHz to 690kHz envelope
• Synchronous Rectification: Both (internal and external diode support)
• Package Compatibility: Surface mount QFN format
• Compliance: ROHS3 and REACH compliance maintained

The TPS61088RHLT from Texas Instruments operates as a boost regulator with adjustable output, synchronous rectification, and surface mount packaging. However, critical parameter differences exist that must be evaluated for application compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TPS61088RHLT is an active product from Texas Instruments and maintains ROHS3 compliance, supporting long-term design viability. However, direct substitution requires design-level evaluation due to parameter deviations:

Output Current Limitation: The TPS61088RHLT delivers 10A maximum output current versus the MP3427GL-P's 17A capability. Applications requiring the full 17A output current cannot use this substitute without external current multiplication or parallel configuration.

Output Voltage Range Offset: The TPS61088RHLT minimum output voltage is 4.5V, whereas the MP3427GL-P supports 3V minimum output. Applications requiring 3V to 4.4V output cannot be directly substituted.

Operating Temperature Range: The MP3427GL-P operates to 125°C junction temperature; the TPS61088RHLT is rated to 85°C ambient. High-temperature applications must verify thermal margin compatibility.

Package Footprint Difference: The 22-PowerVFQFN (3x4) differs from the 20-VFQFN (4.6x4.5) in pin count and layout. PCB redesign is required.

Switching Frequency Flexibility: The TPS61088RHLT offers wider frequency range (200kHz to 2.2MHz) compared to the fixed 450kHz to 690kHz envelope, providing design flexibility for EMI and efficiency optimization.

Frequently Asked Questions (FAQ)

Q: Can the TPS61088RHLT directly replace the MP3427GL-P in existing designs?

A: Direct replacement is not possible without design modification. The TPS61088RHLT has lower output current (10A vs. 17A), higher minimum output voltage (4.5V vs. 3V), different package pinout, and reduced temperature rating. PCB layout changes and circuit validation are required.

Q: What applications are suitable for TPS61088RHLT substitution?

A: The TPS61088RHLT is suitable for boost regulator applications requiring output voltages between 4.5V and 12.6V, output currents up to 10A, and operating temperatures up to 85°C ambient. Input voltage range extends to 12V, providing broader input compatibility than the MP3427GL-P.

Q: Are both parts RoHS compliant?

A: Yes, both the MP3427GL-P and TPS61088RHLT are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What is the package compatibility consideration?

A: The MP3427GL-P uses 22-PowerVFQFN (3x4) packaging with 22 pins, while the TPS61088RHLT uses 20-VFQFN (4.6x4.5) with 20 pins. Footprint, pin assignment, and PCB layout differ significantly, requiring complete redesign of the power stage.

Q: How do switching frequency ranges affect substitution?

A: The MP3427GL-P operates at fixed 450kHz to 690kHz, while the TPS61088RHLT ranges from 200kHz to 2.2MHz. The wider range in the substitute allows frequency optimization for specific EMI and efficiency requirements but requires circuit design adjustment.

Q: What is the current output limitation impact?

A: The 7A reduction in output current (17A to 10A) limits the TPS61088RHLT to lower power applications. High-current designs must either reduce output power or implement parallel device configurations with current-sharing circuitry.