24V, 300W Sync-Buck Reference Design


Design files


The PMP30189 reference design is based on the LM5117 sync buck converter; it supplies 24V @ 11A and it is protected against overcurrent at 13.9A. The internal bias can be supplied internally by means of internal linear regulator, or externally by BJT and Zener diode, thus reducing power dissipation in LM5117. Also the switching frequency is selectable between 100 KHz and 250 KHz. An external tracking input can be used to perform sequencing and soft start tracking. It features also output overvoltage protection with latch.

  • High power (264W), high-efficiency (98.4% @ 27 Vin) sync-buck
  • Precision output overcurrent and overvoltage protection
  • Selectable latching/non-latching overcurrent protection
  • Tracking input + switching frequency selection
Output voltage options PMP30189.1
Vin (Min) (V) 27
Vin (Max) (V) 29
Vout (Nom) (V) 24
Iout (Max) (A) 11
Output Power (W) 264
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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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.

TIDUDV1.PDF (1201 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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

TIDCE08.ZIP (51 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

LM5117-Q1Automotive Grade 5.5-65V Wide Vin, Current Mode Synchronous Buck Controller w Analog Current Monitor

Data sheet: PDF | HTML

LM2903VDual Differential Comparator, Enhanced Voltage

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18533Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 mOhm

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP30189 Test Results Nov. 17, 2017

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