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reference designMPQ2451-5-33

Monolithic Power Systems MPQ2451-5-33

36V, 2.2MHz, 0.6A Step-Down Converter, Available in AEC-Q100

Overview

TopologyBuck Converter
Input voltage3.6-36 V
Switching frequency1800-2600 kHz
Output 13.3 V
IC revision1.0

Description

The MPQ2451 is a high frequency, step-down, switching regulator with an integrated high-voltage high-side power MOSFET. It efficiently provides up to a 0.6A output with current-mode control for fast loop response.

The wide 3.3V-to-36V input range accommodates a variety of automotive step-down applications, and the 3μA shutdown-mode quiescent current allows use in battery-powered applications.

The MPQ2451 achieves high power-conversion efficiency over a wide load range by scaling down the switching frequency under light-load condition to reduce the switching and gate driving losses.

Frequency fold-back prevents inductor current runaway during start-up. Thermal shutdown provides reliable, fault-tolerant operation.

The MPQ2451 is available in a cost-effective SOT23-6L package.

Features

  • Guaranteed Industrial/Automotive Temp. Range Limits
    • 130μA Operating Quiescent Current
    • Wide 3.3V-to-36V Operating Input Range
    • 500mΩ Internal Power MOSFET
    • 2MHz Fixed Switching Frequency
    • Internally Compensated
    • Stable with Ceramic Output Capacitors
    • Internal Soft-Start
    • Precision Current Limit Without Current Sensing Resistor

    • 90% Efficiency

    • Output Adjustable from 0.8V to 0.8∙VIN
    • 6-Lead SOT23 Package

Typical applications

  • Distributed Power Systems
  • Battery-Powered Systems
  • High-Voltage Power Conversion
  • Automotive Systems
  • Industrial Power Systems

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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74437324033
SPECWE-LHMI SMT Power Inductor, 3.3 µH, 3.5 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
Inductance3.3 µH
Performance Rated Current3.5 A
Saturation Current @ 10%2.75 A
Saturation Current @ 30%5.45 A
DC Resistance76 mΩ
Self Resonant Frequency40 MHz
MountSMT 
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