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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 voltage6-60 V
Switching frequency1000-3000 kHz
Output 11.2 V / 3 A
Output 21.8 V / 1 A
Output 35 V / 10 A
Output 42.5 V / 1 A
Output 53.3 V / 3 A

Description

The LTCR3372 is a highly flexible multioutput power supply IC. The device includes a high-performance, high voltage (HV) step-down DC/DC switching regulator controller thatdrives 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). Precisionenable 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
SamplesAvailability & Sample
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744383360068
SPECWE-MAPI SMT Power Inductor, 0.68 µH, 6.75 A
Simu­lation
Availability
–
Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance0.68 µH
Performance Rated Current6.75 A
Saturation Current @ 30%8.1 A
DC Resistance22 mΩ
Self Resonant Frequency85 MHz
Operating Voltage80 V
MountSMT 
–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 
–Check availability