Electronic devices with power management

An electronic device comprising:

• a first power management device configured to receive an input voltage and output a plurality of first voltages for driving a system-on-chip based on the input voltage;
• and
• a power management device controller configured to control operation of the first power management device, generate a command indicating a current operating scenario of the system-on-chip, and transmit the command to the first power management device,
• wherein the first power management device includes:
• a switching regulator configured to generate a converted voltage based on the input voltage;
• a plurality of low drop-out (LDO) regulators configured to generate a corresponding plurality of output voltages based on the converted voltage;
• first registers configured to store a plurality of output voltages generated by the plurality of LDO regulators;
• a first dropout voltage register configured to store a plurality of dropout voltages corresponding to each of the plurality of LDO regulators, the plurality of dropout voltages corresponding to operating scenarios of the system-on-chip;
• and
• a switching regulator controller configured to:
• receive the plurality of output voltages from the first registers,
• receive dropout voltages corresponding to the current operating scenario of the system-on-chip, from among the plurality of dropout voltages, from the first dropout voltage register, and
• dynamically control the converted voltage based on the plurality of received output voltages and the dropout voltages corresponding to the current operating scenario, in response to reception of the command from the power management device controller.

An operation method of a power management device,

• wherein the power management device includes a switching regulator configured to generate a converted voltage based on an input voltage, and a switching regulator controller configured to dynamically control the converted voltage, the operating method comprising:
• receiving a plurality of dropout voltages corresponding to each of a plurality of low drop-out (LDO) regulators, the plurality of dropout voltages corresponding to operating scenarios of a system-on-chip from a power management device controller;
• storing the plurality of dropout voltages in a dropout voltage register;
• receiving a command indicating a current operating scenario of the system-on-chip from the power management device controller;
• storing a plurality of output voltages generated by the plurality of the LDO regulators in first registers;
• in response to the command, obtaining, at the switching regulator controller, dropout voltages corresponding to the current operating scenario from among the plurality of dropout voltages stored in the dropout voltage register, and obtaining the plurality of output voltages from the first registers;
• generating, by the switching regulator controller, a voltage control signal for controlling the switching regulator, based on the obtained dropout voltages and the obtained plurality of output voltages;
• and
• providing the generated voltage control signal to the switching regulator.