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reference designLM5149

Texas Instruments LM5149

LM5149 80-V, Synchronous, Buck, DC/DC Controller with Ultra-Low IQ and Integrated Active EMI Filter

Overview

TopologyBuck Converter
Input voltage4-72 V
Output 13.3 V / 20 A
IC revisionA

Description

The LM5149 is a 80-V, ultra-low IQ synchronous buck DC/DC controller for high-current, single-output applications. The controller uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. The LM5149 can be set up in interleaved dual-phase mode with accurate current sharing for high-current applications. The device can operate with VIN as low as 3.5 V, at nearly 100% duty cycle if needed.

Features

  • Functional Safety-Capable
  • Documentation available to aid functional safety system design
  • Two integrated EMI mitigation mechanisms
  • Active EMI Filter for enhanced EMI performance at lower frequencies
  • Selectable dual random spread spectrum (DRSS) for enhanced EMI performance across

Typical applications

  • Test and measurement
  • Industrial transport
  • Building automation
  • Wireless infrastucture

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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74437368022
SPECWE-LHMI SMT Power Inductor, 2.2 µH, 14.3 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance2.2 µH
Performance Rated Current14.3 A
Saturation Current @ 10%18.1 A
Saturation Current @ 30%38.7 A
DC Resistance7 mΩ
Self Resonant Frequency27 MHz
MountSMT 
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