Voltage booster and reference control circuit

Abstract

A voltage booster includes a charge pump, a boost control circuit, a bandgap circuit, a voltage divider, a bandgap buffer, and a reference control circuit. The charge pump generates a pumped voltage according to an input power voltage. The boost control circuit generates an adjustment signal for controlling the charge pump according to a charge pump reference voltage and a feedback voltage of the pumped voltage. The bandgap circuit generates a bandgap voltage according to the pumped voltage. The voltage divider generates an input power reference voltage according to the input power voltage. The bandgap buffer generates a bandgap reference voltage according to the bandgap voltage. The reference control circuit generates the charge pump reference voltage according to the input power reference voltage before the bandgap circuit becomes ready, and generates the charge pump reference voltage according to the bandgap reference voltage after the bandgap circuit is ready.

Dependencies are inferred from the claim text.