1.2V, 1.8V, 2.8V DC to DC Multi-Output Power Supply for Cellular Phone

Using the TPS65000EVM 2.25 MHz Step-Down Converter with Dual LDO. The LDOs are capable of supplying 300mA and can operate with an input voltage range between 1.6V and 6.0V, allowing them to be supplied from the step-down converter or directly from the main battery