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reference designMP9181

Monolithic Power Systems MP9181

High Efficiency, Fast Transient, 3A, 4.5V-20V Input Synchronous Step-down Converter in a Tiny 2mmx3mm QFN12 Package

Overview

TopologyBuck Converter
Input voltage4.5-20 V
Output 11.2 V / 3 A
IC revision1.01

Description

The MP9181 is a fully-integrated, highefficiency,synchronous, step-down, switch mode converter. It offers a very compact solution that can achieve 3A continuous output current over a wide input supply range with excellent load and line regulation. This device operates with high efficiency over a wide output-current load range.Constant-On-Time (COT) control mode provides fast transient response and eases loop stabilization.Full protection features include SCP, OCP, UVP, and thermal shut down.The MP9181 requires a minimal number of readily-available standard external components.This device is available in a space-saving 2mmx3mm 12-pin QFN package.

Features

  • Compatible with Intel Thunderbolt Specs
  • Wide 4.5V to 20V Operating Input Range
  • 3A Output Current
  • +/-1% VFB Voltage Tolerance
  • Low RDS(ON) Internal Power MOSFETs
  • Proprietary Switching Loss Reduction Technique
  • Up to 95% Peak Efficiency
  • High Light Load Efficiency
  • Soft Start-up/Shutdown
  • Programmable Switching Frequency
  • SCP, OCP, UVP Protection and Thermal Shutdown
  • Hiccup Mode during OCP
  • Power Good Indicator
  • Ultra-small (2mmx3mm) QFN Package

Typical applications

  • Distributed Power Systems
  • Networking/Communication Systems
  • System I/O Power

More information

Products

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Data­sheet
Simu­lation
Downloads
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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7443552200
SPECWE-HCI SMT Flat Wire High Current Inductor, 2 µH, 14.8 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 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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