This reference design uses the TPS54560B in an inverting buck-boost topology to generate a -40-V output from a +5-V input. An auxiliary winding generates a +40-V output with reference to the same ground. For applications needing a positive and negative voltage, the buck topology provides a low-noise output with a minimal component count.
- Less than 0.5% voltage ripple on each output for noise sensitive loads
- Zener clamp keeps output voltages balanced during extreme cross loading
- Low component count requires only 26 power components
- Compact size (40mm x 55mm) minimizes solution size area