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IC manufacturers Monolithic Power Systems

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reference designMP9943

Monolithic Power Systems MP9943

High Efficiency 3A Peak, 36V, Synchronous Step-Down Converter With Power Good

Overview

TopologyBuck Converter
Input voltage12 V
Switching frequency320-500 kHz
Output 13.3 V / 3 A
Output 25 V / 3 A
IC revision1.0

Description

The MP9943 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with built-in power MOSFETs. It offers a very compact solution to achieve a 3A peak output current with excellent load and line regulation over a wide input supply range. The MP9943 has synchronous mode operation for higher efficiency over the output current load range.

Current-mode operation provides fast transient response and eases loop stabilization.

Full protection features include over-current protection and thermal shutdown.

The MP9943 requires a minimal number of readily-available standard external components, and is available in a space-saving QFN-8 (3mmx3mm) package

Features

  • -Wide 4V to 30V Continuous Operating Input Range
  • -36V Input Transient Tolerance
  • -85mΩ/55mΩ Low RDS(ON) Internal Power MOSFETs
  • -High-Efficiency Synchronous Mode Operation
  • -410kHz Switching Frequency
  • -Synchronizes from 200kHz to 2.2MHz External Clock
  • -High Duty Cycle for Automotive Cold-crank
  • -Internal Power-Save Mode
  • -Internal Soft-Start
  • -Power Good Indicator
  • -Over Current Protection and Hiccup
  • -Thermal Shutdown
  • -Output Adjustable from 0.8V
  • -Available in an QFN-8 (3mmx3mm) package

Typical applications

  • •General Consumer
  • Distributed Power Systems
  • •Multi-Function Printers (MFP)

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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744314101
SPECWE-HCI SMT Flat Wire High Current Inductor, 10 µH, 5.3 A
Simu­lation
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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
Inductance10 µH
Performance Rated Current5.3 A
Saturation Current @ 10%1.8 A
Saturation Current @ 30%4 A
DC Resistance33 mΩ
Self Resonant Frequency40 MHz
MaterialSuperflux 
Packaging Unit1000 
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