Patent ID: 6147526
Filing Date: 2000-11-14
Classification: H02M,Y02B

Abstract:
A DC--DC converter comprising:an input node receiving an input voltage V.sub.IN ;a pulse width modulation (PWM) unit coupled to chop said input voltage V.sub.IN into a square wave under control of a V.sub.DRIVE signal;an output stage converting the chopped input voltage V.sub.IN to an output voltage V.sub.OUT coupled to an output node;a reference voltage generator providing a voltage V.sub.REF ;a hysteresis voltage generator providing a voltage V.sub.HYST ;a first comparator generating a signal determined from a difference between said voltage V.sub.REF and said output voltage V.sub.OUT ;a second comparator generating a signal determined from a difference between said output voltage V.sub.OUT and said voltage V.sub.HYST ;a latch coupled to receive the outputs of the first and second comparator, the latch generating an output; anda driver circuit coupled to receive the latch output and generate the V.sub.DRIVE signal.