Power management device and electronic device including the same

A power management device, comprising:

• first and second switching regulators to respectively generate first and second conversion voltages from an input voltage;
• a plurality of low drop-out (LDO) regulators to generate a plurality of output voltages from the first and second conversion voltages;
• a plurality of selectors respectively connected to the LDO regulators;
• and
• a controller to estimate drop-out voltages of the LDO regulators based on output currents of the LDO regulators, generate a plurality of voltage control signals based on the estimated drop-out voltages, and respectively provide the plurality of voltage control signals to the first and second switching regulators in order to dynamically control the first and second conversion voltages,
• wherein the controller generates a plurality of selection control signals and respectively provides the selection control signals to the selectors to control connections between the first and second switching regulators and the LDO regulators.

An electronic device, comprising:

• a plurality of functional blocks including a first functional block and a second functional block;
• a power management device to provide a plurality of output voltages to drive the plurality of functional blocks based on an input voltage;
• a modem including the first functional block;
• and
• an application processor (AP) including the second functional block and a first controller,
• wherein the first controller determines an operation state of the first functional block and an operation state of the second functional block, generates a power control signal based on the operation state of first functional block and the operation state of the second functional block, and provides the generated power control signal to the power management device, and
• wherein the power management device includes:
• at least one switching regulator to generate a conversion voltage from the input voltage;
• a plurality of low drop-out (LDO) regulators to generate a plurality of output voltages from the conversion voltage;
• and
• a second controller to control the conversion voltage based on the power control signal.

A power management device, comprising:

• at least one switching regulator to generate a conversion voltage from an input voltage;
• a plurality of low drop-out (LDO) regulators to generate a plurality of output voltages from the conversion voltage;
• a plurality of selectors respectively connected to the LDO regulators;
• and
• a controller to estimate drop-out voltages of the LDO regulators based on output currents of the LDO regulators and dynamically control the conversion voltage based on the estimated drop-out voltages.