12V, 80W Sync-Buck Reference Design


Design files


The PMP30301 reference design is based on the LM5117 sync buck converter; it supplies 12V @ 6.5A and it is protected against overcurrent at 7.4A. 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-Q1. 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 efficiency (96.8% @ 27Vin) sync-buck
  • Precision output overcurrent and overvoltage protection
  • Selectable latching/non-latching overcurrent protection
  • Tracking input + switching frequency selection
Output voltage options PMP30301.1
Vin (Min) (V) 27
Vin (Max) (V) 29
Vout (Nom) (V) 12
Iout (Max) (A) 6.5
Output Power (W) 78
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
?? View video with transcript Video

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.

TIDUDX7.PDF (1286 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

TIDCE40.ZIP (54 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.

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

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

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

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Test report PMP30301 Test Results Dec. 01, 2017

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​