This reference design uses the LM61495 synchronous buck regulator, with internal top and bottom field effect transistors (FETs), which is configured as a synchronous inverting buck-boost converter. It generates an output of -8 V capable of delivering 2.7-A continuous (4-A peak) of current to the load, from a +12-V +/-10% input. The design is built on the PMP23241 printed circuit board, which is a four-layer board with one ounce copper for each of the four layers. The board is 76.2 mm x 68.6 mm. The solution size is approximately 17.0 mm x 30.5 mm, excluding the input bulk capacitor C1. See LM61495 functional safety failure in time rate, failure mode distribution, and pin failure mode analysis for any safety concerns.
| Output voltage options | PMP23333.1 |
|---|---|
| Vin (Min) (V) | 10.8 |
| Vin (Max) (V) | 13.2 |
| Vout (Nom) (V) | -8 |
| Iout (Max) (A) | -4 |
| Output Power (W) | 32 |
| 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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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
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Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Synchronous Inverting Buck-Boost Converter Ref.Des. for Communications Equipment | PDF | HTML | Feb 14, 2023 |
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