High efficient 32-V / 3-A synchronous 4-switch buck-boost reference design


Design files


This telecom reference design features a highly effective 100-W, 4-switch buck-boost. The converter allows to drive a 32-V RF LDMOS out of a wide input range 17 V to 57 V with peak efficiency 98% plus. An input filter is implemented to reduce conducted emissions to source. Additionally, a spread spectrum function and/or fixed PWM mode can be activated through a jumper. Lastly, the switching frequency can be synchronized by base station oven oscillator (30.72 MHz/128 = 240 kHz) to improve radio frequency performance.

  • The highest efficiency of up to 98.7% due to synchronous rectification in both operating modes
  • A 4-switch buck boost topology supports step up and step down with a single inductor
  • A transient response of greater than 2% for 50% load change
Output voltage options PMP30549.1
Vin (Min) (V) 17
Vin (Max) (V) 52
Vout (Nom) (V) 32
Iout (Max) (A) 3
Output Power (W) 96
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- 4 Switch
?? 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.

TIDT056.PDF (1827 K)

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

TIDRY97.PDF (198 K)

Detailed schematic diagram for design layout and components

TIDRY98.PDF (99 K)

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

TIDRY99.PDF (207 K)

Detailed overview of design layout for component placement


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

TIDCF53.ZIP (159 K)

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

TIDRYA0.PDF (1386 K)

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)

LM517655V wide VIN synchronous 4-switch buck-boost controller

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 High Efficient 32-V / 3-A Synchronous 4-Switch Buck-Boost Reference Design Dec. 19, 2018

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. ​​​​​​​​