POWER SUPPLY CIRCUIT WITH SHORT CIRCUIT PROTECTION

Certain aspects of the present disclosure provide techniques and apparatus for supplying power, including short circuit protection. One example power supply circuit generally includes a switching regulator including an output coupled to a first power supply node, a battery node for coupling to a battery, a switch coupled between the first power supply node and the battery node, a first transistor including a gate coupled to the first power supply node and a source coupled to a reference potential node of the power supply circuit, and a first current source or a resistive element, coupled between a power supply rail and a drain of the first transistor. The power supply circuit may be configured to detect a short circuit on the first power supply node and trigger an automatic fault protection (AFP) mode after completion of a soft start of a voltage on the first power supply node.