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reference designLTC3312SA

Analog Devices LTC3312SA

5V, Dual 6A/Dual-Phase 12A Step-Down DC/DC Regulator

Overview

TopologyBuck Converter
Input voltage2.25-5.5 V
Switching frequency1000-3000 kHz
Output 11.2 V / 6 A
Output 21.8 V / 6 A

Description

The LTC®3312SA features dual monolithic synchronous 6A step-down converters in a 4mm × 3mm package for space saving applications with demanding performancerequirements. Using a constant frequency, peak current mode architecture at switching frequencies up to 3MHz, both bucks achieve high efficiency and fast transient response with small external components. The LTC3312SA can also be configured as a single output,2-phase 12A step-down converter.

Features

  • Dual 6A Outputs
  • Configurable as Single Output, 2-Phase 12A Buck
  • High Efficiency: 12mΩ High-Side and 8mΩ Low-Side
  • ±1% Maximum Total DC Output Error
  • Wide Bandwidth, Fast Transient Response
  • Internal Input Capacitors Reduce EMI
  • VIN Range: 2.25V to 5.5V
  • VOUT Range: 0.5V to VIN
  • Programmable Frequency to 3MHz
  • Low Ripple Burst Mode® Operation with Low IQ
  • Shutdown Current: 1.4μA
  • 35ns Minimum On-Time
  • Internal Compensation
  • Precision Enable, Power Good for Power Sequencing
  • Tracking, Programmable Soft-Start, Temp Monitor Output
  • Thermally Enhanced, 22-Lead 4mm × 3mm ×0.95mm LQFN package
  • AEC-Q100 Qualified for Automotive

Typical applications

  • Communications, Servers, Telecom Power Supplies, Optical Networking
  • FPGA, ASIC, μP Core Supplies
  • Industrial, Distributed DC Power Systems (POL)
  • Automotive

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
RDC typ.(mΩ)
VOP(V)
Mount
SamplesAvailability & Sample
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74479290125
SPECWE-PMCI Power Molded Chip Inductor, 0.25 µH, 9.05 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PMCI Power Molded Chip Inductor
Inductance0.25 µH
Performance Rated Current9.05 A
Saturation Current @ 10%8.5 A
Saturation Current @ 30%15.65 A
DC Resistance31 mΩ
Self Resonant Frequency150 MHz
DC Resistance26 mΩ
–
MountSMT 
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744383360033
SPECWE-MAPI SMT Power Inductor, 0.33 µH, 8.7 A
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance0.33 µH
Performance Rated Current8.7 A
Saturation Current @ 10%5.45 A
Saturation Current @ 30%10.5 A
DC Resistance17 mΩ
Self Resonant Frequency140 MHz
DC Resistance14 mΩ
Operating Voltage80 V
MountSMT 
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