Voltage supply device for use in mobile communication device, has switch regulator with input coupled with voltage input, and voltage regulator coupled with output of switch regulator, where voltage regulator is coupled with voltage output

摘要

The device has a switch regulator (3) with an input (31), which is coupled with a voltage input (1), where the switch regulator has a clock input (34). A voltage regulator (4) is coupled with an output (32) of the switch regulator at an input-side, and is coupled with a voltage output (2) at an output side, where the voltage regulator is a linear regulator. The voltage regulator is coupled with the voltage input at the input-side independent of the control signal, which is generated by a control circuit (5) independent of supply voltage at the voltage input. An independent claim is also included for a method for supplying voltage in a mobile communication device.