5A, 4.5V - 55V Input, Frequency-Programmable, Fully Integrated, Synchronous, Step-Down Converter

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Product Description

The MP4575 is a frequency-programmable, step-down, switching converter with integrated, internal, high-side and low-side power MOSFETs. The MP4575 can provide 5A of continuous output current with peak current control for excellent transient response and efficiency performance. The wide 4.5V to 55V input voltage range accommodates a variety of step-down applications, including industrial, PoE, automotive, and printers with a DC high-voltage bus. The MP4575 uses peak-current-mode control to regulate the output voltage. The MP4575 provides over-current protection (OCP) with valley current detection, which is used to prevent the current from running away. The MP4575 also has accurate and reliable over-voltage protection (OVP) and auto-recovery thermal protection. An optional external soft start is available. Enable and power good indication functions can be used to track the power easily. To increase efficiency, the MP4575 scales down the switching frequency automatically when the load is light. Meanwhile, the low-side MOSFET is turned off to reduce driver loss when zero inductor current is detected. Synchronous operation mode with the integrated low-side MOSFET is useful for reducing conduction loss and reducing external components space to save cost. The MP4575 is available in a TSSOP-20 EP package with an exposed pad.

Product Features

  • Wide 4.5V to 55V Input Voltage Range
  • 90m? and 70m? Internal High-Side and Low-Side Power MOSFETs
  • Peak-Current-Mode Control
  • Programmable Switching Frequency
  • Optional External Soft Start
  • Over-Current Protection (OCP) with Valley Current Detection
  • Supports External Synchronous Clock
  • Over-Voltage Protection (OVP)
  • Current Limit Decreases during Output Short for Better Thermal Performance
  • Power Good Indication
  • Thermal Shutdown Protection
  • Available in a TSSOP-20 EP Package


  • fsw (max) (kHz)0
  • Vin (min) (V)4.5
  • Vin (max) (V)55
  • Iout (max) (A)5
  • Vfb (typ) (V)1
  • Iq (typ) (mA)0.45
  • mps_Status2
  • Mps StatusActive
  • GradeCatalog
  • PackageTSSOP20 EP
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync, Programmable Frequency