Voltage stabilizing circuit and electronic device

摘要

A voltage stabilizing circuit (200) includes an input terminal (202) that receives an external input voltage, a three terminal voltage regulator (20) including an input pin (22) and an output pin (26); and a voltage reduction unit (10). The voltage reduction unit (10) reduces the external input voltage and outputs the reduced external input voltage to the input pin (22). The three terminal voltage regulator (20) regulates the reduced external input voltage to a stabilized supply voltage, and outputs the stabilized supply voltage through the output pin (26) for powering a load (300).