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IC manufacturers Monolithic Power Systems

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reference designMP2249

Monolithic Power Systems MP2249

1MHz, 6V, 3A, Low-Voltage Synchronous Step-Down Converter

Overview

TopologyBuck Converter
Input voltage2.5-6 V
Output 11.8 V / 3 A
IC revision1.0

Description

The MP2249 is a 1MHz constant frequency,current mode, PWM step-down converter. The device integrates a main switch and a synchronous rectifier for high efficiency and eliminates the need for an external Schottky diode. It is ideal for powering portable equipment that runs from a single cell Lithium- Ion (Li+) battery.

The MP2249 can supply 3A of load current from a 2.5V to 6V input voltage. It can run at 100% duty cycle for low dropout applications. The MP2249 provides internal soft-start control to reduce rush current and output discharge function to control discharging of the output capacitor.

The MP2249 is available in small 3mmx3mm TQFN10 or SOIC8E package.

Features

  • High Efficiency: Up to 90%
  • Power Save Mode at Light Load
  • 1MHz Constant Switching Frequency
  • Up to 4.5A Peak Current
  • 2.5V to 6V Input Voltage Range
  • Output Adjustable from 0.6V to VIN
  • 100% Duty Cycle in Dropout
  • Output Discharge Function
  • Internal Soft-Start Control
  • Power Good Indicator
  • Short Circuit Protection
  • Thermal Fault Protection
  • Available in 3mmx3mm TQFN10 or SOIC8E Package

Typical applications

  • Portable Instruments
  • MP3 Players
  • Microprocessors and DSP Core Supplies
  • Smart Phones
  • PDAs
  • Cellular Phones
  • Digital Still and Video Cameras

More information

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L(µH)
IRP,40K(A)
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744777002
SPECWE-PD SMT Power Inductor, 2.2 µH, 6.9 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance2.2 µH
Performance Rated Current6.9 A
Saturation Current6.5 A
DC Resistance20 mΩ
Self Resonant Frequency60 MHz
Size7345 
VersionStandard 
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