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reference designMP2143H

Monolithic Power Systems MP2143H

3A, 5.5V, 2.0MHz Synchronous Stepdown Switcher

Overview

TopologyBuck Converter
Input voltage2.5-5.5 V
Switching frequency1800-3000 kHz
Output 11.2 V / 3 A
IC revision1.0

Description

The MP2143H is a monolithic, step-down, switch-mode converter with internal power MOSFETs. It can achieve up to 3A continuous output current from a 2.5V to 5.5V input voltage with excellent load and line regulation. The output voltage can be regulated as low as 0.6V.

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

The MP2143H is available in small QFN-10 package and requires only a minimal number of readily-available standard external components.

The MP2143H is ideal for a wide range of applications including high-performance DSPs, FPGAs, and portable instruments.

Features

  • -Wide 2.5V to 5.5V Operating Input Range
  • -Output Voltage as Low as 0.6V
  • -100% Duty Cycle in Dropout
  • -Up to 3A Output Current
  • -80mΩ and 40mΩ Internal Power MOSFET Switches
  • -Default 2.0MHz Switching Frequency
  • -EN and Power-Good for Power Sequencing
  • -Cycle-by-Cycle Over-Current Protection
  • -Auto Discharge at Power Off
  • -Short-Circuit Protect with Hiccup Mode
  • -Stable with Low-ESR Output Ceramic Capacitors
  • -Available in QFN-10 (2mmx3mm) Package

Typical applications

  • Wireless/Networking Cards
  • Handheld/Battery-powered Systems
  • Low Voltage I/O System Power

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

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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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