nth switching event when the power switch 102 is opened thus vcc charging is more infrequent reducing the times when the switching element 109 disconnects the load node 111 and the load 110 from ground further vcc charging current during the rare charging intervals can be increased so as to better fit with the load current during load supply mode to even further adjust load current and vcc charging current the power converter may be operated in a current limited mode when the switching element is open and vcc charging current is generated when in the current limited mode the output power provided by the power converter is reduced e g by controlling on off times of the power switch 102 or by other appropriate means to reduce the available load current the above circuit arrangement provides for a very efficient means to generate internal supply voltage as the internal power supply is taken from the output power of the converter since typical efficiencies of switched power converters are high gt 95 internal loss of the power converter is reduced and efficiency even further improved no extra power supply to generate the power converter operating voltage is necessary the transistor of switching element 109 need not be of a high voltage type even though the generated output voltage may be high in an optional modification of the control circuit shown in fig1 a voltage regulator 120 e g a ldo regulator is provided to provide an operating voltage vcc for the control circuit during start up i e when the power converter is switched on and before a sufficient output voltage vout is generated at the.