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IC manufacturers Monolithic Power Systems

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reference designMP2145

Monolithic Power Systems MP2145

5.5V, 6A, 1.2MHz, High-Efficiency, 40μA IQ, Constant On-Time Synchronous, Step-Down Switcher

Overview

TopologyBuck Converter
Input voltage2.8-5.5 V
Switching frequency960-1440 kHz
Output 11.2 V / 6 A
IC revision1.1

Description

The MP2145 is a monolithic, step-down, switch-mode converter with internal power MOSFETs. It can achieve up to 6A continuous output current from a 2.8V-to-5.5V input voltage with excellent load and line regulation. The output voltage can be regulated to as low as 0.6V.

Constant-on-time control provides a fast transient response and eases loop stabilization. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown.

The MP2145 is available in a small QFN2×3mm package and requires only a minimal number of readily-available, standard, external components.

The MP2145 is ideal for a wide range of applications, including storage (SSD, HDD), high-performance DSPs, FPGAs, and distributed power systems.

Features

  • Up to 6A Output Current
  • Wide 2.8V-to-5.5V Operating Input Range
  • 20mΩ and 12mΩ Internal Power MOSFETs
  • 40µA Quiescent Current
  • 1.2MHz Fixed Switching Frequency
  • 1% Feedback Accuracy
  • External Mode Control
  • External VCON Control
  • Adjustable Output from 0.6V
  • 1.5ms Internal SS Time with Pre-Bias Startup
  • Cycle-by-Cycle Over Current Protection
  • Short Circuit Protection with Hiccup Mode
  • Stable with Low-ESR Output Ceramic Capacitors
  • Thermal Shutdown
  • Available in a 2mm×3mm QFN Package
  • Output Discharge Function

Typical applications

  • Battery-Powered Devices
  • Storage (SSD, HDD)
  • Portable Instruments

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
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744373240047
SPECWE-LHMI SMT Power Inductor, 0.47 µH, 8.7 A
Simu­lation
Availability
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Downloads9 files

EDA models: Components ZIP

CAD files ZIP

Electric models ZIP

Download all 9 files as zip archive
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance0.47 µH
Performance Rated Current8.7 A
Saturation Current @ 10%10.4 A
Saturation Current @ 30%19.6 A
DC Resistance14 mΩ
Self Resonant Frequency122 MHz
MountSMT 
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