LTC3877
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LTC3877

Dual Phase Step-Down Synchronous Controller with VID Output Voltage Programming and Low Value DCR Sensing

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Part Models 4
1ku List Price Starting From $4.71
Features
  • 6-Bit Parallel VID (Voltage Identification) Inputs Set Output Voltage from 0.6V to 1.23V in 10mV Steps
  • Output Voltage Range: 0.6V to 5V (Without VID)
  • Ultra Low Value DCR/RSENSE Current Sensing
  • ±1% Maximum Total Regulation Voltage Accuracy Over Temperature
  • Dual Differential Remote Sensing Amplifiers
  • tON(MIN) = 40ns, Capable of Very Low Duty Cycles at High Frequency
  • Phase-Lockable Frequency from 250kHz to 1MHz
  • Current Mismatch Between Channels: 5% Max
  • Adjustable Soft-Start Current Ramping or Tracking
  • Multi-IC Operation Up To 12 Phases
  • Wide VIN Range: 4.5V to 38V
  • Dual Power Good Output Voltage Monitors
  • Output Overvoltage Protection
  • Foldback Output Current Limiting and Soft Recovery
Additional Details
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The LTC3877 is a VID-programmable, constant frequency current mode step-down controller using an advanced and proprietary architecture. This new architecture enhances the signal-to-noise ratio of the current sense signal, allowing the use of very low DC resistance power inductors to maximize efficiency in high current applications. This feature also dramatically reduces the current sensing error, so that current sharing is greatly improved in multi-phase low DCR applications. In addition, the controller achieves a minimum on-time of just 40ns, permitting the use of high switching frequency at high step-down ratios.

The LTC3877 features dual high speed remote sense differential amplifiers, programmable current sense limits and DCR temperature compensation to limit the maximum output current precisely over temperature. The LTC3877 also features a precise 0.6V reference with guaranteed accuracy of ±0.5%. The LTC3877 is available in a low profile 44-lead 7mm × 7mm QFN package.

Applications

  • FPGAs and Processor Power
  • Servers and Computing
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Part Models 4
1ku List Price Starting From $4.71
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LTC3877

Documentation

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Data Sheet

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UPDATED 07/27/2015
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LTC3877: TC3877 -Dual Phase Step-Down Synchronous Controller with VID Output Voltage Programming and Low Value DCR Sensing Data Sheet

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UPDATED 09/20/2016
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LTC3877: TC3877 -VIDによる出力電圧設定と値の小さいDCRによる検出を備えた2フェーズ同期整流式降圧コントローラ データシート

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Reliability Data

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UPDATED 03/26/2018
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R526 Reliability Data redirect icon

365.77 K

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User Guide

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UPDATED 08/24/2015
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DC2229A - Demo Manual redirect icon

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Technical Articles

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UPDATED 07/11/2016
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Multiphase Current Mode Controllers Power the Latest Generation 20 Nanometer FPGAs redirect icon

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UPDATED 01/28/2016
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多相电流模式控制器可为最新一代的 20nm FPGA 供电 redirect icon

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Design Note

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UPDATED 01/12/2016
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DN547 - VID Controller with Phase Extender Provides 120A Power Supply for Latest Generation of FPGAs, ASICs and Processors redirect icon

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UPDATED 02/02/2016
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DN547 - 具相位扩展器的 VID 控制器可为最新一代的 FPGA、ASIC 和处理器提供 120A 电源 redirect icon

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UPDATED 09/01/2016
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DN547 - 最新世代のFPGA、ASIC、およびプロセッサ対応の120A電源を実現する位相拡張器内蔵のVIDコントローラ redirect icon

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UPDATED 02/19/2016
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Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions redirect icon

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UPDATED 02/19/2016
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给 Altera Arria 10 FPGA 和 Arria 10 SoC 供电：经过测试和验证的电源管理解决方案 redirect icon

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UPDATED 02/19/2016
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DN549 - Altera Arria 10 FPGAおよびArria 10 SoCへの電力供給：試験および検証済みのパワー・マネージメント・ソリューション redirect icon

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Documentation

Technical Documents 6
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Data Sheet 1

LTC3877: TC3877 -Dual Phase Step-Down Synchronous Controller with VID Output Voltage Programming and Low Value DCR Sensing Data Sheet

Reliability Data 1

R526 Reliability Data

User Guide 1

DC2229A - Demo Manual

Design Note 2

DN547 - VID Controller with Phase Extender Provides 120A Power Supply for Latest Generation of FPGAs, ASICs and Processors
Powering Altera Arria 10 FPGA and Arria 10 SoC: Tested and Verified Power Management Solutions

Technical Articles 1

Multiphase Current Mode Controllers Power the Latest Generation 20 Nanometer FPGAs

Press Release 1

Proven Power Solutions for Altera Arria 10 FPGA

Webcast 1

Designing Power Solutions for FPGA Applications

Video

1

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Video

2017-09-18

LTC3877 Video Product Brief

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3877EUK#PBF 44-Lead QFN (7mm x 7mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC3877EUK#TRPBF 44-Lead QFN (7mm x 7mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC3877IUK#PBF 44-Lead QFN (7mm x 7mm x 0.75mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC3877IUK#TRPBF 44-Lead QFN (7mm x 7mm x 0.75mm w/ EP) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

Software & Part Ecosystem

Parts Product Life Cycle Description

Digital Power System Managers1
LTC2980
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Evaluation Kits 2

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DC2229A-B

LTC3877/LTC3874 Demo Board | 4-Phase Buck Controller with VID Inputs, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT = 0.6V to 1.23V at 120A

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DC2229A-B

LTC3877/LTC3874 Demo Board | 4-Phase Buck Controller with VID Inputs, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT = 0.6V to 1.23V at 120A

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DC2229A-B
LTC3877/LTC3874 Demo Board | 4-Phase Buck Controller with VID Inputs, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT = 0.6V to 1.23V at 120A
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Product Detail

Demonstration circuits 2229A-A and 2229A-B feature the LTC3877 in two high output current, high efficiency, VID programmed step-down converters with sub-mΩ DCR sensing. For both converters, the input voltage range is 6V to 14V and the switching frequency is 400kHz.

Resources

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DC2229A - Design Files Download

2.00M

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DC2229A - Demo Manual Download

1.00M

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DC2229A-B - Schematic Download

110.00K

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DC2229A-A

LTC3877 Demo Board | Dual Buck Controller, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT1 is VID Programmable from 0.6V to 1.23V @ 30A, VOUT2 is 1.5V @ 30A

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DC2229A-A

LTC3877 Demo Board | Dual Buck Controller, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT1 is VID Programmable from 0.6V to 1.23V @ 30A, VOUT2 is 1.5V @ 30A

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DC2229A-A
LTC3877 Demo Board | Dual Buck Controller, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT1 is VID Programmable from 0.6V to 1.23V @ 30A, VOUT2 is 1.5V @ 30A
Buy Now View Details

Product Detail

Demonstration circuits 2229A-A and 2229A-B feature the LTC3877 in two high output current, high efficiency, VID programmed step-down converters with sub-mΩ DCR sensing. For both converters, the input voltage range is 6V to 14V and the switching frequency is 400kHz.

Resources

pdf icon

ZIP

DC2229A - Design Files Download

2.00M

pdf icon

PDF

DC2229A - Demo Manual Download

1.00M

pdf icon

PDF

DC2229A-A - Schematic Download

110.00K

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Evaluation Kits2

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DC2229A-B

LTC3877/LTC3874 Demo Board | 4-Phase Buck Controller with VID Inputs, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT = 0.6V to 1.23V at 120A
evaluation kit item images

DC2229A-A

LTC3877 Demo Board | Dual Buck Controller, Sub-mΩ DCR Sensing, 6V ≤ VIN ≤ 14V, VOUT1 is VID Programmable from 0.6V to 1.23V @ 30A, VOUT2 is 1.5V @ 30A

Reference Designs 1

Arria 10 (Rev E3- Linear Technology) Dev Kit

Altera Arria 10 FPGA Development Kit

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Altera Arria 10 FPGA Development Kit

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Altera Arria 10 FPGA Development Kit

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
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Reference Designs1

Arria 10 (Rev E3- Linear Technology) Dev Kit

Altera Arria 10 FPGA Development Kit

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