16 provides feedback of output voltage to control regulator 18 sensor 16 sends a portion of the output voltage to control regulator 18 filters out transient high frequency noise upon the output voltage signal and also delays the feedback output sense signal 22 control regulator 18 receives a proportional amount of output voltage as well as a proportional amount of input voltage and based upon a comparison of the two inputs provides a standby signal 24 to oscillator 12 standby signal 24 provides control or modulation of voltage boost produced from oscillator 12 and multiplier 14 as will be described hereinbelow when standby signal 24 is active oscillator 12 ceases operation and goes into standby or power down mode thus when placed in standby mode oscillator 12 no longer consumes power except for insignificant leakage current and output voltage is passively maintained for a substantial length of time within voltage multiplier 14 by utilizing feedback signal 22 indicative of output voltage magnitude and by comparing the standby signal to a proportion of the input signal control regulator 18 assumes control of oscillator 12 via timed standby signal 24 control regulator 18 thereby regulates the power drawn through boost circuit 10 by regulating power consumption within the active components of oscillator 12 oscillator 12 normally provides boosting control function of circuit 10 however once deactivated by standby signal 24 oscillator 12 no longer drives the input voltage necessary to produce the boosted output voltage instead output voltage is substantially maintained using passive storage components described hereinbelow connected to the output of circuit 10 as shown in fig1 boost circuit 10 is capable of providing controlling voltage or output voltage to a load device such as a portable computer in particular boost circuit 10 is.