6V - 18V Input Sync-Buck 0.5A LED Driver Reference Design


Design files


This LM20323 integrated FET sync-buck converter regulates the current in a white LED to 0.5A with minimum parts count. LED current is accurately measured with an INA193 and provides feedback to regulate the output current.

  • High switching frequency (520KHz) allows small size
  • Integrated controller allows low parts count
  • This design has been verified and includes a test report
Output voltage options PMP10487.1
Vin (Min) (V) 6
Vin (Max) (V) 18
Vout (Nom) (V) 2.8
Iout (Max) (A) .5
Output Power (W) 1.4
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.

TIDU749A.PDF (1740 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

TIDRLE0.ZIP (22325 K)

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

TIDCC31.ZIP (392 K)

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

TIDRLD9.PDF (5163 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LM203234.5-36V, 3A Current Mode Synchronous Buck Regulator

Data sheet: PDF
Analog current-sense amplifiers

INA193-16 to 80V, 500kHz current sense amplifier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP10487 Test Results (Rev. A) Apr. 14, 2016

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