POWER-ON RESET CIRCUIT AND UNDER-VOLTAGE LOCKOUT CIRCUIT COMPRISING THE SAME

摘要

An UVLO circuit according to an aspect of the present invention includes: a power-on reset (POR) circuit generating an output based on a first current that flows according to an increase of a power supply voltage and not operating in a normal state of the power supply voltage; and a logic operation unit generating a reset signal according to an output of the POR circuit and an output based on a result of comparison between a sense voltage that corresponds to the power supply voltage and a predetermined reference voltage.

主权项

1. A power-on reset (POR) circuit comprising:
a capacitor in which a first current flows according to an increase of a power supply voltage; a current mirror configured to mirror the first current to a second current; and a transistor configured to be operated by the second current, wherein the power supply voltage reaches a normal reference voltage, and the POR circuit blocks mirroring of the current mirror and turns off the transistor.