Inverting Buck Boost Converter Using TPS40200 (12V to -8V@1.3A) Reference Design


Design files


PMP5026 uses the TPS40200 in an inverting buck boost configuration to generate a negative output from a positive input.  This type of circuit is useful in a number of applications including Audio, Communications, Military/Space etc.  This design uses a nominal 12V input to generate an output of -8V@1.3A.  The circuit also provides a way to synchronize and sequence this particular design with other power rails in the system.

Output voltage options PMP5026.1
Vin (Min) (V) 10.8
Vin (Max) (V) 13.2
Vout (Nom) (V) -8
Iout (Max) (A) 1.3
Output Power (W) 10.4
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- Non Sync

Design files & products

Design files

Download ready-to-use system files to speed your design process.

SLVR544.PDF (324 K)

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

SLVR543.PDF (49 K)

Detailed schematic diagram for design layout and components

SLVR542.PDF (20 K)

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


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS40200Wide Input Non-Synchronous Buck DC/DC Controller

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Test report PMP5026 Test Results Nov. 12, 2010

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