Device for controlling charging switch in switching regulator closes switch according to operating clock, opens it in response to comparator output signal if defined relationship detected between inductance current, capacitance voltage

摘要

The switching regulator has a network of an inductance (100), filter capacitor (102) and diode (104). A voltage regulated by controlling the charging switch (106) is output at the filter capacitor. The device has a clock generator, a device for detecting the output voltage, a device for detecting a current through the inductance, a comparator (K) of the current and voltage signals (1118,1119) to determine if a defined relationship exists and a device (1115) for controlling the charging switch to close it according to the operating clock and to open it in response to a comparator output signal when the defined relationship is detected. Independent claims are also included for the following: (A) a method of controlling a charging switch (B) and a switching regulator.