Power-on-reset circuit with low power consumption

For use with circuitry that is reset by a power-on reset signal that is provided in response to power being provided, a circuit comprising:

• a detector that includes a portion that is configured to draw current from a supply voltage, the detector configured to
• detect that the supply voltage has exceeded a trip-point voltage level,
• disable, in response to detecting that the supply voltage exceeds the trip point voltage level, current draw from the portion of the detector, and
• enable, in response to an enable signal, current draw from the portion of the detector;
• a pulse generator configured to generate a reset signal in response to the supply voltage transitioning from a voltage below the trip point voltage level to above the trip point voltage level;
• and
• a monitor configured to detect that the supply voltage has dropped and to provide, in response to detecting the supply voltage has dropped, the enable signal to the detector to enable current draw from the portion of the detector.