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Rack server motherboard

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Block diagram

Rack server motherboard

Block diagram

Overview

Our integrated circuits and reference designs help you quickly create a rack server motherboard design with higher energy efficiency, density, and fast data computing to support the growth of cloud computing and emerging technologies like artificial intelligence and machine learning.

Design requirements

Next-generation rack server motherboards in the datacenter architecture often require:

  • High DC/DC power conversion and protection.
  • Increased density to meet standard rack and OCP rack size requirements.
  • High-bandwidth data throughputs requiring leading-edge signal processing.
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Block diagram

Find products and reference designs for your system.

Rack server motherboard

Power supply unit (PSU) Power supply unit(PSU) JTAG JTAG Platform controller hub (PCH) Platform controller hub (PCH) Voltage reference Voltage reference ESD protection ESD protection PCH uController PCH uController Retimers, redrivers Retimers, redrivers I2C level shifter/repeater I2C level shifter/repeater Little logic Little logic SAS/SATA redriver SAS/SATA redriver PCI/PCIe PHY, bridges PCI/PCIe PHY, bridges USB retimers, redrivers, port controllers USB retimers, redrivers, port controllers eFuse, load switches eFuse, load switches I2C switch I2C switch DC/DC multiphase controller DC/DC multiphase controller JTAG mux JTAGmux Power stage Power stage Clock generator Clock generator Sensing Sensing Temperature sensing Temperature sensing Current sensing Current sensing Memory Memory LDO + multichannel PMIC LDO + multichannel PMIC Power stage Power stage Buck converter single & multi-output Buck converter single & multi-output DC/DC multiphase controller DC/DC multiphase controller DIMM modules DIMM modules CPU CPU DC/DC multiphase controller DC/DC multiphase controller Central processor Central processor Power stage Power stage DC/DC buck converter DC/DC buck converter CPLD/board level sequencer CPLD/board level sequencer Sequencer Sequencer CPLD controller CPLDcontroller Voltage level translation Voltage level translation Board management controller (BMC) Board management controller (BMC) RS-232 RS-232 Voltage level translation Voltage level translation BMC uController BMC uController Little logic Little logic ESD protection ESD protection Clock buffer Clock buffer Ethernet PHY, bridges & retimers Ethernet PHY, bridges & retimers Video, SPI mux Video, SPI mux Oscillator Oscillator ADC ADC System power System power Primary hot swap controller (current protection) Primary hot swap controller (current protection) Standby eFuse Standby eFuse DC/DC buck & multiphase controllers DC/DC buck & multiphase controllers DC/DC buck converters & PMIC DC/DC buck converters & PMIC Sequencer Sequencer MOSFETs MOSFETs Voltage margining and sensing Voltage margining and sensing

System power

close

System power provides the distributed auxiliary supply and standby power rails and board level power protection and monitoring capability.

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Power management (29)
eFuses & hot swap controllers
  • TPS1689—9V to 80V, 3.65mΩ, 20A stackable integrated hot swap (eFuse) with PMBus digital telemetry
    Data sheet: PDF | HTML
  • TPS25984B—4.5V to 16V, 0.8mΩ, 70A stackable eFuse with accurate and fast current monitor
    Data sheet: PDF | HTML
  • TPS1685—9V to 80V, 3.65mΩ, 20A stackable integrated hot swap (eFuse) with accurate and fast current monitor
    Data sheet: PDF | HTML
  • TPS25983—2.7V to 26V, 2.7mΩ 20A integrated hot-swap eFuse with current monitor and blocking FET drive
    Data sheet: PDF | HTML
  • TPS25981—2.7-V to 16-V, 10-A, 6-mΩ eFuse with transient overcurrent blanking timer
    Data sheet: PDF | HTML
  • TPS25990—2.9-V to 16-V, 0.79-mΩ, 60-A eFuse with digital telemetry controller
    Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)
  • TPS546B26—4-V to 16-V input, 25-A, PMBus, synchronous step-down converter
    Data sheet: PDF | HTML
  • LM70880-Q1—Automotive, high-density, 4.5-V to 80-V input, 8-A low-EMI synchronous DC/DC step-down converter
    Data sheet: PDF | HTML
  • TPS548A28—2.7-V to 16-V, 15-A synchronous buck converter with remote sense and 3-V LDO
    Data sheet: PDF | HTML
  • TPS548B28—2.7-V to 16-V input, 20-A synchronous step-down converter with remote sense and hiccup current limit
    Data sheet: PDF | HTML
  • TPS544E27—4V to 18V input, 40A, PMBus and SVID synchronous step-down converter
    Data sheet: PDF | HTML
  • TPS54J061—4-V to 16-V input, 6-A synchronous buck converter, 600-mV reference voltage and hiccup current limit
    Data sheet: PDF | HTML
Multi-channel ICs (PMICs)
  • TPS53830A—High-current PMIC for DDR5 server DIMMS with logging auto-clear function
    Data sheet: PDF | HTML
  • TPS51200—3A Sink/Source DDR Termination Regulator w/ VTTREF Buffered Reference for DDR2, DDR3, DDR3L and DDR4
    Data sheet: PDF | HTML
  • TPS53820—Integrated step-down converter with SVID for Intel CPU power
    Data sheet: PDF | HTML
  • TPS53317—Low Input Voltage, 6A Synchronous Step-Down SWIFT™ Converter for DDR Memory Termination
    Data sheet: PDF | HTML
  • TPS51206—2A Peak Sink/Source DDR Termination Regulator with VTTREF Buffered Reference for DDR2/3/3L/4
    Data sheet: PDF | HTML
  • TPS53317A—0.9V-6V Input, 6-A Output, D-CAP+ Mode, SWIFT Synchronous Step-Down Converter for DDR VTT
    Data sheet: PDF | HTML
MOSFETs
  • CSD17318Q2—30-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 16.9 mOhm
    Data sheet: PDF | HTML
  • CSD16570Q5B—25-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 0.82 mOhm
    Data sheet: PDF | HTML
  • CSD17573Q5B—30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.45 mOhm
    Data sheet: PDF | HTML
  • CSD19536KTT—100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm
    Data sheet: PDF | HTML
  • CSD17570Q5B—30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 0.92 mOhm
    Data sheet: PDF | HTML
  • CSD15571Q2—20-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 19.2 mOhm
    Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)
  • TPS53219A—3-V to 28-V, 20-A, synchronous D-CAP buck controller with Eco Mode
    Data sheet: PDF | HTML
  • UCC29002—Advanced 8 pin load share controller, -40°C to 105°C
    Data sheet: PDF | HTML
  • TPS53819A—3-V to 28-V, 40-A, synchronous D-CAP2 buck controller with PMBus
    Data sheet: PDF | HTML
  • TPS51315—3-V to 14-V, 10-A synchronous buck converter with D-CAP control
    Data sheet: PDF | HTML
  • TPS51220A—3-V to 28-V, synchronous peak current mode buck controller for notebook power in RSN/RTV package
    Data sheet: PDF | HTML
Passive and discrete (8)
ESD protection diodes
  • TPD4E05U06—Quad 0.5-pF, 5.5-V, ±12-kV ESD protection diode for USB, HDMI & High Speed Interfaces
    Data sheet: PDF | HTML
  • TPD1E10B09—10-pF, ±9V, ±20-kV ESD protection diode with 6-A 8/20-uS surge in 0402 Package
    Data sheet: PDF | HTML
  • TPD1E10B06—12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
    Data sheet: PDF | HTML
  • TPD1E1B04—1-pF, ±3.6-V, ±30-kV ESD protection diode with 6.3-A 8/20-uS surge & low clamping in 0402 packa
    Data sheet: PDF | HTML
  • ESD122—Dual 0.2-pF, ±3.6-V, ±17-kV ESD protection diode for USB Type-C and HDMI 2.0
    Data sheet: PDF | HTML
  • TPD4E001—Quad 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0
    Data sheet: PDF | HTML
TVS diodes
  • PMP22339—High voltage 800-W SEPIC converter reference design for server battery backup charging
    Schematic: PDF
  • PMP22510—Switched capacitor integrated buck (SCIB) power converter reference design
    Test report: PDF Schematic: PDF
  • PMP23496—8kW hot-swap reference design for 48V artificial intelligence servers
    Test report: PDF | HTML Schematic: PDF
  • TIDA-01634—Multi-MHz GaN Power Stage Reference Design for High-Speed DC/DC Converters
    Design guide: PDF Schematic: PDF
  • TIDA-050022—Power stage reference design for <100-VIN DC/DC converters
    Design guide: PDF Schematic: PDF
Selection guide

Technical documentation

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Type Title Date
Analog Design Journal System telemetry: What, why and how? 30 Apr 2014
More literature Advanced Signal Conditioning Made Easy and Efficient 24 Jan 2017
Application note Noise Analysis for High Speed Op Amps (Rev. A) 19 Jan 2005
Application note Point-of-Load Solutions for Data Center App Implementing VR13.HC Vccin Spec (Rev. A) PDF | HTML 18 May 2022
Application note Low Voltage Translation for SPI, UART, RGMII, JTAG Interfaces (Rev. B) PDF | HTML 11 May 2022
Application brief Enabling SPI-Based Flash Memory Expansion by Using Multiplexers (Rev. B) PDF | HTML 10 May 2022
Application note Advanced Linear Repeater Used in PCIe 3.0 Add-in Card Compliance Environment 03 Oct 2014
Application note Achieve 20-A Circuit Protection and Space Efficiency Using Paralleled eFuses 03 Nov 2016
Analog Design Journal The intricacies of signal integrity in high-speed communications 02 May 2016

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