Voltage detection circuit for charge pump

A voltage detection circuit for a charge pump, comprising a sampling circuit, a latch circuit, wherein:

• the sampling circuit is configured to sample a supply voltage and provide the sampled voltage to the latch circuit;
• the latch circuit is configured to detect the sampled voltage and latch a result of the detection;
• the latch circuit is connected to a voltage regulation circuit which is configured to regulate a cascade structure of the charge pump based on the result of the detection so as to maintain an output voltage of the charge pump stable;
• and
• the latch circuit comprises a comparator having a non-inverting input coupled to the sampled voltage, an inverting input coupled to a reference voltage, and an output configured to output the result of the detection.