METHOD FOR ADJUSTING A CUT-OFF POWER SUPPLY SOURCE, AND CORRESPONDING SUPPLY SOURCE

摘要

The step-down type switching power supply is configured to deliver an output voltage (Vout), comprising a power transistor (TP) configured to be cyclically switched on by a first control signal (SC1) and is intended to operate in a pulse width modulation (PWM) mode in which it is configured to generate an error voltage (Verror) from the output voltage (Vout) and a reference voltage ( Vref) or in a pulse frequency modulation (PFM) mode. The adjustment method comprises applying, in the pulse width modulation (PWM) mode, a first delay (R1) to the first control signal (SC1), the first delay (R1) being determined so reduce the difference between the error voltage (Verror) and the reference voltage (Vref).