24-W, low-input voltage synchronous boost converter reference design


Design files


This reference design uses the LM51521-Q1 boost controller to supply an 8-V, 3-A load and has been optimized to operate from a single-cell supercapacitor at the input. The converter can discharge a supercapacitor as low as 1.0 V to leverage as much stored energy as possible to open a car door in an emergency situtation, where the KL30 car battery voltage is not present.

  • Converter can operate from a single-cell supercapacitor and deliver 24-W output power.
  • Design operates down to 1.0-V input voltage enabling deep discharge of a supercapacitor.
  • High efficiency conversion is due to use of synchronous rectification.
  • Starts up from as low as 1.25 V.
  • Design has been built and tested with test report being available.
Output voltage options PMP31011.1 PMP31011.2
Vin (Min) (V) 1 1
Vin (Max) (V) 3 3
Vout (Nom) (V) 8 5
Iout (Max) (A) 3 .1
Output Power (W) 24 .5
Isolated/Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC
Topology Boost- Synchronous Boost- 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.

TIDT330.PDF (1534 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

TIDMBL4.ZIP (1717 K)

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


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.

Boost controllers (external switch)

LM51521-Q1Automotive 2.2-MHz wide VIN low IQ synchronous boost controller with disabled bypass mode

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

TPS61071-Q1Adjustable, 600-mA switch, 1200-kHz boost converter in ThinSOT-23 with forced PWM mode

Data sheet: PDF | HTML
Shunt voltage references

TL431-Q1Automotive adjustable precision shunt regulator (pin layout: KRA)

Data sheet: PDF | HTML

Technical documentation

No results found. Please clear your search and try again.
View all 1
Type Title Date
Test report 24-W, Low-Input Voltage Synchronous Boost Converter Reference Design PDF | HTML Jun. 07, 2023

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. ​​​​​​​​