Monolithic Power Systems (MPS) MP4315 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MP4315 Synchronous Step-Down Converters

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Monolithic Power Systems (MPS) MP4315 Synchronous Step-Down Converters offer a configurable frequency and an integrated internal high-side MOSFET (HS-FET) and low-side MOSFET (LS-FET). The MP4315 delivers up to 5A of highly efficient output with current mode control for fast loop response. The device accommodates a wide 3.3V to 45V input voltage range ideal for various step-down applications in automotive input environments.

The MPS MP4315 Synchronous Step-Down Converter provides a low 1.7μA shutdown mode quiescent current designed for battery-powered applications. High power conversion efficiency across a wide load range is achieved by scaling down the switching frequency under light-load conditions to reduce the switching and gate driver losses.

Additionally, the MP4315 converter’s open-drain power good signal indicates whether the output is within 93% to 106% of its nominal voltage. Frequency foldback helps prevent inductor current runaway during start-up. Meanwhile, thermal shutdown delivers reliable, fault-tolerant operation. High-duty cycle and low-dropout mode are supplied for the automotive cold crank conditions.

The MP4315 is housed in a QFN-20 (4mm x 4mm) wettable flank package.

Features

  • Wide 3.3V to 45V operating voltage range
  • 5A Continuous output current
  • 1.7μA Low shutdown supply current
  • 18μA Sleep mode quiescent current
  • Internal 48mΩ high-side MOSFET and 20mΩ low-side MOSFET
  • 350kHz to 1000kHz Configurable switching frequency for car battery applications
  • Can be synchronized to an external clock
  • Out-of-phase synchronized clock output
  • Frequency Spread Spectrum (FSS) for low EMI
  • Symmetric VIN for low EMI
  • Power good output
  • External soft start
  • 100ns Minimum on time
  • Selectable Advanced Asynchronous Mode (AAM) or Forced Continuous Conduction Mode (FCCM)
  • Low-dropout mode
  • Hiccup over-current protection
  • Available in a QFN-20 (4mm x 4mm) package
  • Available in a wettable flank package

Typical Application

more information: https://www.monolithicpower.com/en/mp4315.html

About mixos

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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