the load current i load continues to increase during the short circuit condition until the output voltage v load drops to the gate source threshold voltage v gsth of the nmosfet 103 at time t 2 at this point nmosfet 103 turns off which turns off the pmosfets 102 112 i load drops to zero and v source u2032 returns to its normal value at time t 3 the enable signal is toggled off for a period of time which is at least the rc constant of the second resistor 108 and the capacitor 110 this resets the circuit 100 so that it can continue to supply power to the load 118 after the enable signal returns to high at time t 4 fig4 is a conceptual block diagram of a wireless mobile handset 400 e g a cellular phone personal digital assistant pda or the like that includes a short circuit protection circuit 414 which is either of the short circuit protection circuits 100 200 of fig1 and 2 the wireless mobile handset 400 includes at least one antenna 401 a controller 402 having a processor and memory not shown and an air interface with radio frequency transceiver 424 having a.