Patent ID: 7741818
Filing Date: 2010-06-22
Classification: H02M

Abstract:
1. A voltage regulator that includes an output unit for converting an input voltage provided by a power source into a predetermined voltage, and for outputting the converted voltage, comprising: a monitoring unit for determining whether the input voltage provided by the power source is greater than a reference voltage; and a step-up unit for stepping up the input voltage provided by the power source if the monitoring unit determines that the input voltage is less than the reference voltage; wherein the output unit includes a converting unit for converting the stepped-up voltage into the predetermined voltage, wherein the monitoring unit includes: a reference voltage generating unit for generating the reference voltage; a comparing unit for comparing the input voltage with the reference voltage, and for providing a signal that turns the step-up unit on if the monitoring unit determines that the input voltage is less than the reference voltage; and a voltage dividing unit for dividing the input voltage provided to the comparing unit from the power source, and wherein the voltage dividing unit includes a plurality of resistors between an output terminal and an inverting input terminal of the comparing unit such that hysteresis is provided to the comparing unit.