Dynamic current limits for direct current-to-direct current (DC-DC) converters

A wireless transceiver comprising:

• transmit circuitry comprising:
• a power amplifier;
• and
• a power management circuit comprising:
• a direct current-to-direct current (DC-DC) converter configured to provide a supply voltage for the power amplifier;
• a ramp compensation circuit coupled to the DC-DC converter and configured to provide information related to a state of the DC-DC converter and a target supply voltage;
• an output node coupled to the DC-DC converter;
• a dynamic current limit circuit coupled to the ramp compensation circuit and configured to provide a dynamic current value based on the information provided by the ramp compensation circuit;
• a current feedback circuit associated with the DC-DC converter;
• a voltage feedback circuit associated with the DC-DC converter and configured to receive the dynamic current value from the dynamic current limit circuit and provide a reference current based on the dynamic current value;
• a comparator coupled to the current feedback circuit and the voltage feedback circuit, where the reference current output from the voltage feedback circuit is used as a reference for a current output of the current feedback circuit, the comparator further configured to provide a feedback signal to the DC-DC converter.

A method for managing transitions between supply voltage levels, the method comprising:

• providing, by a ramp compensation circuit coupled to a direct current-to-direct current (DC-DC) converter, information relating to a state of the DC-DC converter and a target supply voltage, an output node being coupled to the DC-DC converter and a current feedback circuit being associated with the DC-DC converter;
• providing, by a dynamic current limit circuit coupled to the ramp compensation circuit, a dynamic current value based on the information provided by the ramp compensation circuit;
• receiving, by a voltage feedback circuit associated with the DC-DC converter, the dynamic current value from the dynamic current limit circuit and providing a reference current based on the dynamic current value;
• using, by a comparator coupled to the current feedback circuit and the voltage feedback circuit, the reference current output from the voltage feedback circuit as a reference for a current output of the current feedback circuit, and providing a feedback signal to the DC-DC converter, wherein the dynamic current value is initially determined at transition and subsequently adjusted back to a level that supports normal operation.