LOW-DROPOUT VOLTAGE REGULATOR WITH A VOLTAGE SLEW RATE EFFICIENT TRANSIENT RESPONSE BOOST CIRCUIT

摘要

A low-dropout (LDO) voliage regulator for generating an output voltage(Vout) is disclosed. The voltage regulator includes a startup circuit (305), a curvature corrected bandgap circuit (310), an error amplifier (31 S)1 a metal oxide semiconductor (MOS) pass device (320) and a voltage slew rate efficient transient response boost circuit. The MOS pass device (320) has a gate node which is coupled to the output of ihe error ampl ifier (315), and a drain node for generating the output voltage (Vout). The voltage slew rate efficient transient response boost circuit applies a voltage to the gate node of the MOS pass device (320) to accelerate the response time of the error amplifier (315) in enabling the LDO voltage regulator to reach its final regulated output voltage (Vout) when an output voltage drop occurs in the LDO voltage regulator.