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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

Parts approved by Analog Devices

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74408943047
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-SPC SMT Power Inductor
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74438356022
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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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744316100
SPECWE-HCI SMT Flat Wire High Current Inductor

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Availability
–
Downloads–
Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
–Check availability