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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
L(µH)
LR(µH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
SamplesAvailability & Sample
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7443082015
SPECWE-HCM SMT High Current Flat Wire Inductor, 0.15 µH, 0.147 µH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 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
Inductance0.15 µH
Rated Inductance0.147 µH
Rated Current60 A
Saturation Current @ 10%80.5 A
Saturation Current @ 30%87.1 A
DC Resistance0.18 mΩ
Self Resonant Frequency63 MHz
MaterialMnZn 
–Check availability
7443082017
SPECWE-HCM SMT High Current Flat Wire Inductor, 0.17 µH, 0.15 µH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 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
Inductance0.17 µH
Rated Inductance0.15 µH
Rated Current60 A
Saturation Current @ 10%62.9 A
Saturation Current @ 30%69.3 A
DC Resistance0.18 mΩ
Self Resonant Frequency56 MHz
MaterialMnZn 
–Check availability
7443082018
SPECWE-HCM SMT High Current Flat Wire Inductor, 0.18 µH, 0.165 µH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 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
Inductance0.18 µH
Rated Inductance0.165 µH
Rated Current60 A
Saturation Current @ 10%59.3 A
Saturation Current @ 30%66.4 A
DC Resistance0.18 mΩ
Self Resonant Frequency53 MHz
MaterialMnZn 
–Check availability
744308025
SPECWE-HCM SMT High Current Flat Wire Inductor, 0.25 µH, 0.246 µH

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
–
Downloads9 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
Inductance0.25 µH
Rated Inductance0.246 µH
Rated Current25 A
Saturation Current @ 10%41.6 A
Saturation Current @ 30%46.5 A
DC Resistance0.37 mΩ
Self Resonant Frequency40 MHz
MaterialMnZn 
–Check availability