This small and simple inverting power reference design features a high accuracy step-down converter in an inverting buck-boost topology. It generates a -12-V output at 400 mA of current from a 3-V to 4.5-V input voltage, enabling to cleanly power negative voltage rails in space-constrained applications such as optical networking systems for telecom infrastructure, active and distributed antenna systems or remote radio unit for wireless infrastructure, as well as for test and measurement applications in industrial.
| Output voltage options | TIDA-01423.1 |
|---|---|
| Vin (Min) (V) | 3 |
| Vin (Max) (V) | 4.5 |
| Vout (Nom) (V) | -12 |
| Iout (Max) (A) | .4 |
| Output Power (W) | 4.8 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck Boost- Inverting |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
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
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 3.-0-V to 4.5-V Input, 400-mA, –12-V Inverting Buck-Boost Reference Design | Jun. 18, 2017 | |
| Technical article | How to modify a step-down converter to the inverting buck-boost topology | PDF | HTML | May 17, 2018 |
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