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reference designLTC3860EUH | Demoboard DC1755A

Analog Devices LTC3860EUH | Demoboard DC1755A

LTC3860EUH - Wide Input Range,High Efficiency Step-Down DC/DC Converter

Overview

TopologyBuck Converter
Input voltage6-14 V
Output 11.5 V / 50 A
Output 21.2 V / 50 A
IC revision2

Description

Demonstration circuit DC1755A provides the user with two high current dual phase synchronous buck converters driven by the LTC3860. These buck converters provide outputs of 1.5V/50A and 1.2V/50A over an input voltagerange of 6V to 14V and a switching frequency of 500kHz. The board can be easily modified for a 4-phase, single VO, 100A supply. The power stage for each phase consists of the tri-state PWM compatible 6mm × 6mm FairchildDrMOS module and a 0.47μH 13.2mm × 12.8mm iron powder type inductor from Würth. A high density, two sided drop-in layout is used. The entire converter, excluding the bulk output and input capacitors, fits within a 2.25” × 1.38” area on the board.

Features

  • High efficiency and high current density.
  • Remote sensing for each output.
  • Optional resistors to tie the two outputs together.
  • Connector and header to tie two or more boards together for up to 12-phase operation.
  • RUN, PGOOD and TRACK/SS pins for each output.
  • CLKIN and CLKOUT pins.
  • Onboard bias voltage regulator.
  • BNC connectors to monitor each output voltage.

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
RDC max.(mΩ)
fres(MHz)
Size
Version
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
Material
Qty.
SamplesAvailability & Sample
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744355147
SPECWE-HCI SMT Flat Wire High Current Inductor, 0.47 µH, 54.9 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance0.47 µH
Performance Rated Current54.9 A
DC Resistance0.704 mΩ
Self Resonant Frequency100 MHz
Size1365 
VersionSMT 
Saturation Current @ 10%25 A
Saturation Current @ 30%50 A
DC Resistance0.67 mΩ
MaterialWE-PERM 
Packaging Unit400 
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7447789127
SPECWE-PD SMT Power Inductor, 27 µH, 2 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Inductance27 µH
Performance Rated Current2 A
DC Resistance210 mΩ
Self Resonant Frequency18 MHz
Size7332 
VersionRobust 
Saturation Current @ 10%1.35 A
Saturation Current @ 30%1.6 A
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–
Packaging Unit1000 
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