Stability-compensated linear voltage regulator and design method thereof

The invention provides a stability-compensated linear voltage regulator and a design method thereof. The stability-compensated linear voltage regulator comprises an adjusting tube, a biasing circuit,an error amplifier, a feedback resistance network, a negative feedback compensation circuit and a voltage buffer circuit. An LDO is stabilized by isolating the error amplifier and the adjusting tube through the buffer voltage circuit, and the error amplifier adopts a folded cascode structure, so that the output voltage swing is improved. According to the present invention, the good transient response of the circuit is ensured due to large load capacitance. A negative feedback compensation circuit compensates an output current into the error amplifier in a mirror image manner, so that the output resistance of the error amplifier is reduced, and the stability of the linear voltage regulator is further compensated. 本发明提供了一种稳定性补偿的线性稳压器及其设计方法，包括调整管、偏置电路、误差放大器、反馈电阻网络、负反馈补偿电路、电压buffer电路。通过buffer电压电路隔离误差放大器和调整管稳定了LDO，误差放大