Methods and apparatuses for extended current limit for power regulation
AssigneeQUALCOMM Incorporated
InventorsMarko Koski, Edgar Marti-Arbona, Gordon Lee, Anish Muttreja, Ravi Jenkal
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Abstract
A method and apparatuses for power regulation using an extended current limit are disclosed. The power regulator detects an occurrence of an output current of the regulator exceeding a first current limit, triggers an extended current limit timer based on the detected occurrence, regulates the output current according to a second current limit higher than the first current limit based on a duration of the extended current limit timer, and regulates the output current according to the first current limit based on an expiration of the duration of the extended current limit timer.
Claims9
A switching regulator circuit, comprising:
- a first transistor having a first terminal coupled to an input voltage and a second terminal coupled to an output of a switching regulator;
- a second transistor having a first terminal coupled to the second terminal of the first transistor and a second terminal coupled to a reference potential;
- and
- control logic having a first output coupled to a gate of the first transistor and a second output coupled to a gate of the second transistor, the control logic configured to:
- detect an occurrence of an output current of the switching regulator exceeding a first current limit;
- trigger an extended current limit timer based on the detected occurrence;
- regulate the output current according to a second current limit higher than the first current limit based on a duration of the extended current limit timer;
- and
- regulate the output current accordingly to the first current limit based on an expiration of the duration of the extended current limit timer.
Dependencies are inferred from the claim text.