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reference designLTC3374

Analog Devices LTC3374

8-Channel Parallelable 1A Buck DC/DCs

Overview

TopologyBuck Converter
Input voltage2.25-5.5 V
Switching frequency1000-3000 kHz
Output 13.3 V / 1 A
Output 21 V / 1 A
Output 31.8 V / 1 A
Output 42.5 V / 1 A
Output 51.2 V / 1 A
Output 62 V / 4 A
Output 71.6 V / 1 A
Output 81.5 V / 1 A
Output 93 V / 1 A
Output 101.2 V / 3 A

Description

The LTC®3374 is a high efficiency multioutput power supplyIC. The DC/DCs consist of eight synchronous buckconverters (1A each) all powered from independent 2.25Vto 5.5V input supplies.The DC/DCs may be used independently or in parallel toachieve higher currents of up to 4A per output with a sharedinductor. The common buck switching frequency may beprogrammed with an external resistor, synchronized to anexternal 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 in90° steps. Precision enable pin thresholds provide reliablepower-up sequencing. The LTC3374 is available in acompact 38-lead 5mm × 7mm QFN package as well as a38-lead TSSOP package.

Features

8-Channel Independent Step-Down DC/DCsMaster-Slave Configurable for Up to 4A per OutputRail with a Single InductorIndependent VIN Supplies for Each DC/DC(2.25V to 5.5V)All DC/DCs Have 0.8V to VIN Output RangePrecision Enable Pin Thresholds for AutonomousSequencing1MHz to 3MHz Programmable/SynchronizableOscillator Frequency (2MHz Default)Die Temperature Monitor OutputThermally-Enhanced 38-Lead QFN (5mm × 7mm)and TSSOP Packages

Typical applications

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

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(nH)
LR(nH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
IRP,40K(A)
RDC max.(mΩ)
Mount
SamplesAvailability & Sample
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744301025
SPECWE-HCM SMT High Current Flat Wire Inductor, 250 nH, 250 nH

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
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Inductance250 nH
Rated Inductance250 nH
Rated Current38 A
Saturation Current @ 10%54.4 A
Saturation Current @ 30%64.7 A
DC Resistance0.32 mΩ
Self Resonant Frequency33 MHz
MaterialMnZn 
Performance Rated Current56 A
–
MountSMT 
–Check availability
74437346022
SPECWE-LHMI SMT Power Inductor, 2200 nH, –
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance2200 nH
–
–
Saturation Current @ 10%10 A
Saturation Current @ 30%19.1 A
–
Self Resonant Frequency32 MHz
–
Performance Rated Current7.7 A
DC Resistance20 mΩ
MountSMT 
–Check availability