Switched capacitor integrated buck (SCIB) power converter reference design


Design files


This switched capacitor integrated buck (SCIB) converter is a highly-optimized design for use in a high-power, high-density single output power converter, operating from a wide-range 40-V to 60-V input rail to produce a 8.0-V, 5.0-V, 3.3-V or 1.8-V rail up to 40A of load current each phase. This reference design design integrates the CSD95490Q5MC and CSD95379Q3M NexFET power MOSFET stages, the UCC27212 driver ICs, capacitors and inductors in a 23mm x 23mm outline PCB layout, and is compatible with multiphase buck controllers TPS53667 to complete the power stage switching function.

  • Wide input voltage range from 40 V to 60 V
  • Regulated 8.0-V, 5.0-V, 3.3-V or 1.8-V output
  • 30-A continous operating current capability
  • 40-A peak operating current capability
  • Over 95% system efficiency at 5.0-V, 20-A output
  • High-density 23-mm x 23-mm footprint
Output voltage options PMP22510.1 PMP22510.2 PMP22510.3 PMP22510.4
Vin (Min) (V) 40 40 40 40
Vin (Max) (V) 60 60 60 60
Vout (Nom) (V) 1.8 3.3 5 8
Iout (Max) (A) 40 40 40 20
Output Power (W) 72 132 200 160
Isolated/Non-Isolated Non-Isolated Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC DC DC
Topology Other Other Other Other
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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.

TIDT188.PDF (2101 K)

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

TIDM620.PDF (743 K)

Detailed schematic diagram for design layout and components

TIDM621.PDF (131 K)

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

TIDM622.PDF (7335 K)

Detailed overview of design layout for component placement

TIDM624.ZIP (4242 K)

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


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

TIDM623.PDF (2020 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS536676-Phase, D-CAP+ step-down driverless buck controller with NVM and PMBus interface for ASIC

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS621253V-17V, 300mA Buck Converter With Adjustable Enable Threshold And Hysteresis

Data sheet: PDF | HTML

LMV7275-Q1Automotive-grade, micropower, single comparator

Data sheet: PDF | HTML
Half-bridge drivers

UCC272124-A, 120-V half bridge gate driver with 5-V UVLO and negative voltage handling

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

TPS701500-mA, dual-channel low-dropout voltage regulator with power good & enable

Data sheet: PDF
Low-side drivers

LM51147.6-A/1.3-A single channel gate driver with 4-V UVLO and split outputs

Data sheet: PDF | HTML
Power stages

CSD95379Q3MSynchronous Buck NexFET Power Stage, CSD95379Q3M

Data sheet: PDF | HTML
Power stages

CSD95490Q5MC75A Synchronous Buck NexFET™ Smart Power Stage with DualCool Package

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Switched Capacitor Integrated Buck (SCIB) Power Converter Reference Design Jun. 12, 2020

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