DC-DC converters with transient response control

A multi-phase DC-DC converter used to convert an input voltage to an output voltage, comprising:

• a plurality of pulse-width-modulation (PWM) generators configured to generate PWM signals according to the output voltage;
• a transient boost circuit configured to generate an adjusting signal according to the variation of the output voltage;
• a plurality of logic circuits configured to generate switch signals each corresponding to one of the PWM signals, wherein the switching signal is at a high level when the corresponding PWM signal or the adjusting signal is at the high level and the switching signal is at a low level when the corresponding PWM signal and the adjusting signal are at the low level;
• a plurality of switching devices configured to convert the input voltage to driving signals according to the switching signals;
• and
• a buck circuit configured to receive the driving signals to generate the output voltage.

A multi-phase DC-DC converter used to convert an input voltage to an output voltage, comprising:

• a plurality of pulse-width-modulation (PWM) generators configured to generate PWM signals according to the output voltage;
• a plurality of transient boost circuits configured to generate adjusting signals according to the variation of the output voltage;
• a plurality of logic circuits configured to generate switch signals each corresponding to one of the PWM signals and one of the adjusting signals, wherein the switching signal is at a high level when the corresponding PWM signal or the corresponding adjusting signal is at the high level and the switching signal is at a low level when the corresponding PWM signal and the corresponding adjusting signal are at the low level;
• a plurality of switching devices configured to convert the input voltage to driving signals according to the switching signals;
• and
• a buck circuit configured to receive the driving signals to generate the output voltage.