3.3V Input -0.5V/0.9A Output Synchronous Buck-Boost Reference Design


Design files


This reference design uses the TPS54218 in a synchronous buck-boost configuration to generate a negative 0.5V output from a 3.3V input. Switching at 1MHz, the total solution size is extremely compact. An external LM4040 reference provides a precision pull-up voltage and is necessary to regulate the output at a voltage level that is lower than the internal reference of the controller.

Output voltage options PMP9166.1
Vin (Min) (V) 3
Vin (Max) (V) 3.6
Vout (Nom) (V) -.5
Iout (Max) (A) .9
Output Power (W) .45
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- Inverting^Buck Boost- 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.

SLVUA09.PDF (1231 K)

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

SLVRB91.PDF (100 K)

Detailed schematic diagram for design layout and components

SLVRB92.PDF (78 K)

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

SLVC549.ZIP (158 K)

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

SLVUA10.PDF (140 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)

TPS542182.95V to 6V Input, 2A Synchronous Step-Down SWIFT™ Converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9166 Test Results Nov. 19, 2013

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