Patent ID: 9735677
Date: 2017-08-15
CPC Classifications: H02M

Claim:
1. A digitally controlled DC-DC converter, comprising: a high side switch and a low side switch coupled in series, with a first end of an output inductor coupled to a node between the high side switch and the low side switch and a second end of the output inductor providing a regulated output for a load, with an output capacitor coupled to the second end of the output inductor; a first pulse width modulation (PWM) signal generator configured to generate a first PWM signal having a first duty cycle; a second PWM signal generator configured to generate a second PWM signal having a second duty cycle, the second duty cycle greater than the first duty cycle; logic circuitry to select either the first PWM signal or the second PWM signal for use in controlling the high side switch and the low side switch; and a first comparator coupled to the regulated output, the first comparator configured to compare voltage of the regulated output with a first predefined voltage, an output of the first comparator coupled to the logic circuitry for use in selecting the first PWM signal or the second PWM signal for use in controlling the high side switch and the low side switch.