The invention discloses a
charge pump high-speed detection circuit and method, and the circuit comprises a
time sequence control circuit, a
charge pump circuit, a
comparator, a
fixed capacitor, an adjustable
capacitor, and first, third, fourth, and sixth switches. The
time sequence control circuit outputs a
time sequence control signal to the charge transfer circuit, and the output end of the charge transfer circuit is connected with one end of the
fixed capacitor through the sixth switch; the other end of the
fixed capacitor is connected with one end of the adjustable
capacitor, the other endof the adjustable
capacitor is grounded, and the two ends of the fixed capacitor are grounded through the first and third switches respectively; the common end of the fixed capacitor and the adjustable capacitor is connected with a reference
voltage pin of the
comparator through a fourth switch; the
comparator collects a
voltage value output by the fourth switch, compares the
voltage value with areference voltage and outputs a comparison result to the time
sequence control circuit, and the time
sequence control circuit controls on-off of the charge transfer circuit. According to the invention, the
power consumption is saved, the
capacitance detection mode is adopted, the speed is higher, and ripples are smaller.