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reference designLTC7131-1

Analog Devices LTC7131-1

25A Monolithic Synchronous DC/DC Step-Down Converter with PMBus Interface

Overview

TopologyBuck Converter
Input voltage4.5-20 V
Switching frequency250-2000 kHz
Output 15 V / 25 A
IC revisionA

Description

The LTC®7131-1 is a high efficiency, 25A monolithicsynchronous buck regulator using a phase lockable controlled on-time, current mode architecture. The output voltage is programmable with a single external resistor or an external voltage reference through the reference input (REF) pin. The output voltage can be margined up or down up to ±25% with 0.1% resolution via a PMBus-compliant serial interface. The serial interface can also be used to read back fault status and both time-averaged (~4ms) and peak input/output current, input/output voltage and temperature. System configuration and monitoring is supported by the LTpowerPlay® development system.

Features

  • 4.5V to 20V VIN Range
  • 1% Total VOUT Accuracy Over Temperature
  • Single Resistor-Programmable Reference Voltage: 0.4V to 3.5V
  • PMBus Compliant Serial Interface:
  • Programmable Output Voltage Margining: Up to ±25% VOUT Range with 0.1% Resolution
  • Read Back of Average and Peak Temperature, Current, and Voltage (25Hz Refresh Rate)
  • Fault Status
  • Phase-Lockable Fixed Frequency Up to 2MHz
  • Less Than 1ms Power-Up Time
  • Optional External Reference Input
  • Pin Selectable Fast-Margining of the Output Voltage
  • Power Good Flag with Pin Programmable Thresholds and Filter Delay
  • Differential Remote Output Voltage Sensing
  • Master Shutdown Mode: 125μA Supply Current
  • Clock Out for 2-Phase Operation (50A Load)
  • Available in a Thermally-Enhanced 6.25mm × 7.5mm× 2.22mm BGA Package

Typical applications

  • Point of Load Conversion, Intelligent Energy Efficient Power Conversion
  • ASIC/FPGA/Processor Power

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
VOP(V)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
SamplesAvailability & Sample
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744308025
SPECWE-HCM SMT High Current Flat Wire Inductor, 80 V, 54 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Operating Voltage80 V
Performance Rated Current54 A
Saturation Current @ 10%41 A
Saturation Current @ 30%51 A
DC Resistance0.37 mΩ
Self Resonant Frequency44 MHz
MaterialMnZn 
–Check availability
7443082015
SPECWE-HCM SMT High Current Flat Wire Inductor, 80 V, 60 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Operating Voltage80 V
Performance Rated Current60 A
Saturation Current @ 10%75 A
Saturation Current @ 30%86 A
DC Resistance0.18 mΩ
Self Resonant Frequency45 MHz
MaterialMnZn 
–Check availability
7443082018
SPECWE-HCM SMT High Current Flat Wire Inductor, 80 V, 60 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Operating Voltage80 V
Performance Rated Current60 A
Saturation Current @ 10%64 A
Saturation Current @ 30%75 A
DC Resistance0.18 mΩ
Self Resonant Frequency34 MHz
MaterialMnZn 
–Check availability
7443082017
SPECWE-HCM SMT High Current Flat Wire Inductor, 80 V, 60 A
Simu­lation
Availability
–
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Operating Voltage80 V
Performance Rated Current60 A
Saturation Current @ 10%70 A
Saturation Current @ 30%79 A
DC Resistance0.18 mΩ
Self Resonant Frequency41 MHz
MaterialMnZn 
–Check availability