Inverting Buck Boost Converter, 5V to -12V at 300mA using the TPS40200
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PMP1903 uses the TPS40200 buck controller in an inverting buck boost configuration. This topology takes a positive input and generate a negative output. In this case 5V is converted to -12V at 300mA. The design operates at 500KHz, with ceramic input and output capacitors for small size.