High-current 360-A static / 600-A peak core PMBus voltage 12-phase reference design for ASICs


Design files


This reference design is a a 12-phase power management bus (PMBus) buck converter powering datacenter hardware accelerator, enterprise switch and router application-specific integrated circuit (ASIC) core rails. It provides 360 A of continuous current and 600 A of peak current at 0.85-V nominal voltages. It uses twelve  CSD95480 common footprint 70-A smart power stages. Design includes an on-board high speed dynamic load for testing to stringent dynamic load response requirements of high speed ASICs. The reference design includes a test report showing these capabilities and enables a cut-and-paste design for powering high-current ASIC core rails with PMBus. 

  • Uses twelve CSD95480 common footprint 70-A smart power stages
  • Fusion Digital Power Designer GUI enables easy prototyping through PMBus and manufacturing script generation
  • DCAP+ control mode enables the fastest load transient response and output capacitor (including ceramic cap) reduction
  • High speed on board dynamic load for testing to stringent dynamic load requirements
  • Tested, cut-and-paste design for powering high-current ASIC core rails
Output voltage options PMP21887.1
Vin (Min) (V) 10
Vin (Max) (V) 14
Vout (Nom) (V) .85
Iout (Max) (A) 600
Output Power (W) 510
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase
Communications equipment
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT208.PDF (3924 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDM728.PDF (1135 K)

Detailed schematic diagram for design layout and components

TIDM729.PDF (350 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDM730.PDF (1074 K)

Detailed overview of design layout for component placement

TIDM732.ZIP (4194 K)

Files used for 3D models or 2D drawings of IC components

TIDCFY0.ZIP (3494 K)

Design file that contains information on physical board layer of design PCB

TIDM731.PDF (15210 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

TPS536C7Dual-channel D-CAP+™, PMBus (N+M ≤ 12 phases) step-down, multiphase PWM controller

Data sheet: PDF
AC/DC & DC/DC converters (integrated FET)

TPS621633V-17V 1A Step-Down Converters with DCS-Control™

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS732250-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable

Data sheet: PDF | HTML
Si power stages

CSD95480RWJ70A Synchronous Buck NexFET™ Smart Power Stage in an Industry Standard Footprint

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report High-Current 360-A Static, 600-A Peak Core PMBus Voltage 12-Phase Reference Desi Oct. 14, 2020

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