MP28254

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High Efficiency 4A, 21V, 500kHz Synchronous Step down Converter



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产品描述

The MP28254 is a high frequency synchronous rectified step-down switch mode converter with built in internal power MOSFETs. It offers a very compact solution to achieve 4A continuous output current over a wide input supply range with excellent load and line regulation. The MP28254 has synchronous mode operation for higher efficiency over output current load range.  Current mode operation provides fast transient response and eases loop stabilization.  Full protection features include OCP and thermal shut down.  The MP28254 requires a minimum number of readily available standard external components and is available in a space saving 3x4mm 14-pin QFN package.

Programmable

产品特性

  • Wide 4.5V to 21V Operating Input Range
  • 4A Output Current
  • Low Rds(on) Internal Power MOSFETs
  • Proprietary Switching Loss Reduction Technique
  • High Efficiency Synchronous Mode Operation 
  • Fixed 500kHz Switching Frequency
  • Sync from 300kHz to 2MHz External Clock
  • Internal Compensation
  • Integrated Bootstrap Diode
  • OCP Protection and Thermal Shutdown
  • Output Adjustable from 0.805V
  • Available in a 3x4mm 14-Pin QFN Package

技术参数

  • fsw (max) (kHz)500
  • 最小输入电压4.5
  • Vin (max) (V)21
  • Iout (max) (A)4
  • Isw Limit (typ) (A)5
  • Max Duty Cycle (%)0.9
  • Vfb (typ) (V)0.805
  • Iq (typ) (mA)0.7
  • 额定输出1
  • Vout (min) (V)0.805
  • GradeCatalog
  • PackageQFN-14 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesPower Good, Synchronous Rectification
  • Special Features外部频率同步