Patent ID: 9595866
Date: 2017-03-14
CPC Classifications: H02M

Claim:
1. A switching regulator, comprising: a power converting unit configured to generate a direct current (DC) output voltage based on a switch driving signal and a DC input voltage; and a switch driving unit configured to generate a ripple voltage having information of an inductor current flowing through the power converting unit, add the ripple voltage to a reference voltage to generate a first voltage having a ripple, generate a feedback voltage based on the DC output voltage, compare the first voltage with the feedback voltage in a hysteresis mode to generate a comparison output, and generate the switch driving signal based on the comparison output, wherein the power converting unit comprises: an inductor connected between a first node to which the DC input voltage is applied and a second node; a power switch connected to the second node, and configured to operate in response to the switch driving signal, wherein the switch driving unit comprises: a ripple voltage generator connected to the second node, and configured to generate the ripple voltage having the information of the inductor current flowing through the inductor, wherein the ripple voltage generator comprises: a resistor having a first terminal connected to the second node; a first capacitor having a first terminal connected to a second terminal of the resistor; and a second capacitor having a first terminal connected to the second terminal of the resistor, and a second terminal from which the ripple voltage is output.