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reference designMP28257

Monolithic Power Systems MP28257

4A, Fast Transient, 4.2V-to-20V Input Synchronous Step-Down Converter 2mmx3mm QFN12

Overview

TopologyBuck Converter
Input voltage3.3-20 V
Output 11.2 V / 4 A
IC revision1

Description

The MP28257 is a fully-integrated, synchronous, step-down, switch-modeconverter with a programmable frequency. It offers a very compact solution that can provide up to 4A of continuous output current over a wide input supply range with excellent load and line regulation, and can operate at high efficiency over a wide output current load range.Constant-on-time control mode provides fast transient response and eases loop stabilization.Protections include short-circuit protection, over-current protection, over-voltage protection,under-voltage protection, and thermal shut down.The MP28257 requires a minimal number of readily-available standard external components.The device is available in a space saving 2mmx3mm QFN12 package that complies with ROHS.

Features

  • Wide 4.2V-to-20V Operating Input Range
  • 4A Continuous Output Current
  • Internal 120mΩ High-Side, 50mΩ Low-Side Power MOSFETs
  • Stable with Ceramic Output Capacitors
  • Proprietary Switching Loss-Reduction Technology
  • Power-Good Indicator
  • Soft Startup/Shutdown
  • Programmable Switching Frequency
  • SCP, OCP, OVP, UVP Protection and Thermal Shutdown
  • Output Adjustable from 0.815V to 13V
  • Available in a 2mmx3mm QFN12Package

Typical applications

  • Networking Systems
  • Distributed Power Systems

More information

Products

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Data­sheet
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Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
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7443552200
SPECWE-HCI SMT Flat Wire High Current Inductor, 2 µH, 14.8 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance2 µH
Performance Rated Current14.8 A
Saturation Current @ 10%5 A
Saturation Current @ 30%13 A
DC Resistance7.3 mΩ
Self Resonant Frequency53 MHz
MaterialWE-PERM 
Packaging Unit800 
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