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reference designLTC3372

Analog Devices LTC3372

60V Low IQ Buck Controller Plus 4-Channel 8A Configurable Buck DC/DCs

Overview

TopologyBuck Converter
Input voltage4.5-60 V
Switching frequency1000-3000 kHz
Output 15 V / 2 A
Output 25 V / 4 A
Output 35 V / 1 A
IC revisionA

Description

The LTC3372 is a highly flexible multioutput power supply IC. The device includes a high-performance, high voltage (HV) step-down DC/DC switching regulator controller that drives an all N-channel synchronous power FET stage from a 4.5V to 60V input.The LTC3372 also includes four low voltage (LV) synchronous buck regulators that can be programmed by the C1-C3 pins to share eight 1A integrated power stages in one of eight possible configurations. Each power stage is powered from independent inputs which may be connected to the HV buck’s VOUT or to other 2.25V to 5.5V supplies.The CT pin programs timing parameters of the watchdog timer and LV outputs’ Power-On Reset (RST). Precision enable thresholds facilitate reliable power-up sequencing.The LTC3372 is available in a 48-pin 7mm × 7mm QFN package.

Features

  • HV Buck Controller: VIN = 4.5V to 60V, VOUT = 5V/3.3V
  • LV Buck Regulators: VINA-H = 2.25V to 5.5V, VOUT1-4 ≥ 0.8V
  • 8×1A LV Buck Integrated Power Stages, Configurable as 2, 3 or 4 Output Channels
  • 8 Unique Output Configurations (1A to 4A Per Channel)
  • Low Total No-Load Input Supply Current (IQ)
  • 15µA HV Controller Only (5VOUT)
  • 23μA HV Controller Only (3.3VOUT)
  • 33μA HV Controller (3.3VOUT) Plus One LV Regulator
  • 9μA Per Additional LV Regulator Channel
  • 1MHz to 3MHz Operation (HV Runs at 1/6 Frequency)
  • Programmable or Synchronizable to External Clock
  • Programmable Watchdog and Power-On Reset Delay
  • IC Die Temperature Monitor Output
  • Thermally Enhanced 48-Pin 7mm × 7mm QFN Package

Typical applications

  • General Purpose Multi-Channel Power Supplies
  • Automotive and Industrial Always-On Systems

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
IR(A)
ISAT(A)
RDC max.(mΩ)
Material
Version
ISAT,10%(A)
RDC(mΩ)
Qty.
SamplesAvailability & Sample
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744316100
SPECWE-HCI SMT Flat Wire High Current Inductor, 1 µH, 14.8 A
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance1 µH
Performance Rated Current14.8 A
Saturation Current @ 30%11.5 A
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Self Resonant Frequency158 MHz
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MountSMT 
–
–
DC Resistance5.225 mΩ
MaterialSuperflux 
VersionSMT 
Saturation Current @ 10%5.5 A
DC Resistance4.75 mΩ
Packaging Unit1500 
–Check availability
74438356022
SPECWE-MAPI SMT Power Inductor, 2.2 µH, 6.2 A

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
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance2.2 µH
Performance Rated Current6.2 A
Saturation Current @ 30%7.9 A
DC Resistance29 mΩ
Self Resonant Frequency34 MHz
Operating Voltage80 V
MountSMT 
Rated Current4.7 A
Saturation Current6.2 A
DC Resistance35 mΩ
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VersionSMT 
Saturation Current @ 10%4.05 A
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Packaging Unit1000 
–Check availability
74408943047
SPECWE-SPC SMT Power Inductor, 4.7 µH, –
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-SPC SMT Power Inductor
Inductance4.7 µH
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–
DC Resistance45 mΩ
Self Resonant Frequency44 MHz
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MountSMT 
Rated Current2.2 A
Saturation Current3.2 A
DC Resistance52 mΩ
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VersionSMT 
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Packaging Unit500 
–Check availability