| 摘要 |
A voltage converter100, 200 including a buck converter 117 and a capacitive voltage divider. The converter includes four capacitors, a switch circuit Q1-Q4, an inductor L and a controller III. A first capacitor L1 is coupled between a reference node and a first output node 105 which develops a first output voltage VOUT1. A second capacitor C3 or CAis coupled between an input node and either the reference node or the first output node. The switch circuit couples a third capacitor C2 between the reference and first output nodes in a first state of a PWM signal, and couples the third capacitor between the first output and input nodes in a second PWM signal state. The inductor is coupled to the third capacitor and provides a second output node 113 coupled to the fourth capacitor providing a second output voltage VOUT2. The controller controls the duty cycle of the PWM signal to regulate the second output voltage to a predetermined level. |
