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IC manufacturers Monolithic Power Systems

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reference designMP28256

Monolithic Power Systems MP28256

21V, 3A 500kHz Synchronous Step-Down Coverter

Overview

TopologyBuck Converter
Input voltage4.5-21 V
Switching frequency425-575 kHz
Output 11.2 V / 3 A
IC revision1.01

Description

The MP28256 is a synchronous rectified stepdown switch mode converter with built in internal power MOSFETs. It offers a very compact solution to achieve 3A continuous output current over a wide input supply range with excellent load and line regulation. The MP28256 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 thermalshut down.The MP28256 requires a minimum number of readily available standard external components and is available in a space saving QFN14 (3x4mm) package.

Features

  • Wide 4.5V to 21V Operating Input Range
  • 0.6V internal reference with 2% accuracy
  • 3A Output Current
  • Low Rds(ON) Internal Power MOSFETs
  • Fixed 500kHz Switching Frequency
  • Frequency SYNC from 300kHz to 2MHz
  • External Clock
  • External Soft Start
  • OCP and Thermal Shutdown
  • Separate EN and SYNC pins
  • Available in a QFN14 (3x4mm) Package.

Typical applications

  • Cable Modems
  • Set Top Boxes
  • DSL Modems

More information

Products

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Data­sheet
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Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
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7443552280
SPECWE-HCI SMT Flat Wire High Current Inductor, 2.8 µH, 12.1 A
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Downloads9 files

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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance2.8 µH
Performance Rated Current12.1 A
Saturation Current @ 10%4.8 A
Saturation Current @ 30%11 A
DC Resistance10.6 mΩ
Self Resonant Frequency46 MHz
MaterialWE-PERM 
Packaging Unit800 
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