| 摘要 |
<p>A switching regulator (20) comprises a sense resistor (Rs); a sense current generating circuit (213) for generating a sense current (I<SUB>sense</SUB>) in accordance with a sense voltage (V<SUB>sense</SUB>); a slope current generating circuit (214) for generating a slope current (I<SUB>slope</SUB>) of ramp or triangular wave; a slope voltage generating circuit (215) for generating a slope voltage (V<SUB>slope</SUB>) in accordance with a summed current (I<SUB>sense</SUB>+I<SUB>slope</SUB>); an error amplifier (ERR) for generating an error voltage (V<SUB>err</SUB>) in accordance with an output error; a comparator (CMP) for comparing the error voltage (V<SUB>err</SUB>) with the slope voltage (V<SUB>slope</SUB>) to generate a PWM signal; and a switching control part (CTRL) for performing, based on the PWM signal, ON/OFF control of an output transistor (N1).</p> |
