MP4575

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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.

Programmable

Product Features

  • Wide 4.5V to 55V Input Voltage Range
  • 90mΩ and 70mΩ 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

Parametrics

  • 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
  • GradeCatalog
  • PackageTSSOP20 EP
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesExternal Frequency Sync, Programmable Frequency

Evaluation Kit

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Kit details

The EV4575-F-00A is an evaluation board for the MP4575, a frequency programmable step-down switching converter with integrated internal high-side and low side power MOSFETs. It can provide 5A 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 those applications in industrial, PoE, automotive and printer with DC high voltage bus.

The valley current detection is used to avoid current running way at over current protection. Also it has accurate and reliable over voltage protection, and auto recovery thermal protection. In addition, the optional external soft start is available. Enable and power good indication function can be used to power track easily. In order to increase the efficiency, MP4575 will automatically scaling down the switching frequency when load is light. Meanwhile, the low side MOSFET will be turned off to reduce driver loss when zero inductor current is detected. Synchronous operation mode with integrated low side MOSFET is much helpful to reduce the conduction loss and also beneficial to reduce external components space and save the cost.

The MP4575 is available in a TSSOP-20 EP with exposed pad package.

US$ 25.00 + tax