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.
Download ready-to-use system files to speed your design process.
Test results for the reference design, including efficiency graphs, test prerequisites and more
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
Files used for 3D models or 2D drawings of IC components
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 | ||
|---|---|---|---|---|
| Test report | Synchronous Inverting Buck-Boost Converter Ref.Des. for Communications Equipment | PDF | HTML | Feb. 14, 2023 |
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.