Positive and negative power supply——TPS5430

Convert single power supply to dual power supply through two TPS5430 chips. Many modules require dual power supplies in daily work, so using this chip is undoubtedly a better choice.

The ripple is small, and the difference between the positive power supply and the negative power supply is small. The difference can be adjusted to a minimum through later optimization.

Many voltage output conditions were verified during the design. To ensure convenience, the specific resistor selection has been written on the back of the PCB board.

The input voltage is wider. Basically, the input voltage is about 2V greater than the output, which means the voltage difference is small.

The chip manual will be uploaded in the attachment. If you need it, you can check it out. In the chip manual, ti officially gave a link to online design, which is very easy to use. You can try it.

The link is here https://webench.ti.com/wb5/PartDesigner/quickview.jsp?base_pn=TPS5430&origin=ODS&litsection=application

The TI official website also has many design references that you can learn from.

For low ripple and high adjustment rate, go for it! ! !

It should be noted that when selecting the output voltage, the inductor should also be adjusted appropriately as the voltage changes. For example, when outputting 5V, choose a 15uH inductor, and when outputting 12V, choose a 22uH inductor.