IC manufacturers Analog Devices

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Analog Devices LTC3374

8-Channel Parallelable 1A Buck DC/DCs

Overview

TopologyBuck Converter
Input voltage2.25-5.5 V
Switching frequency1000-3000 kHz
Output 15.5 V / 3 A
IC revisionC

Description

The LTC®3374 is a high efficiency multioutput power supply IC. The DC/DCs consist of eight synchronous buck converters (1A each) all powered from independent 2.25V to 5.5V input supplies.The DC/DCs may be used independently or in parallel to achieve higher currents of up to 4A per output with a shared inductor. The common buck switching frequency may be programmed with an external resistor, synchronized to an external oscillator, or set to a default internal 2MHz clock. The operating mode for all DC/DCs may be programmedvia the MODE pin.To reduce input noise the buck converters are phased in 90° steps. Precision enable pin thresholds provide reliable power-up sequencing. The LTC3374 is available in a compact 38-lead 5mm × 7mm QFN package as well as a38-lead TSSOP package.

Features

  • 8-Channel Independent Step-Down DC/DCs
  • Master-Slave Configurable for Up to 4A per Output Rail with a Single Inductor
  • Independent VIN Supplies for Each DC/DC (2.25V to 5.5V)
  • All DC/DCs Have 0.8V – VIN Output Range
  • Precision Enable Pin Thresholds for Autonomous Sequencing
  • 1MHz to 3MHz Programmable/SynchronizableOscillator Frequency (2MHz Default)
  • Die Temperature Monitor Output
  • Thermally Enhanced 38-Lead QFN (5mm × 7mm) and TSSOP Packages

Typical applications

  • General Purpose Multichannel Power Supplies
  • Automotive
  • Industrial
  • Communications

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74437346022SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-LHMI SMT Power Inductor 2.2 7.7 10 19.1 20 32 SMT
Order Code Data­sheet Simu­lation
74437346022SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples