Abstract
In his article, a comparative analysis of PMOS and NMOS based linear voltage regulators is presented. An output power of 18 mW is considered in the both cases. In PMOS based regulator, the output voltage is 1.6 V and output current is 11.25 mA, whereas in NMOS, they are 1 V and 18 mA respectively. Firstly, a conventional linear regulator is designed with PMOS as pass element and its stability and various performance parameters are analyzed. SPICE simulation is carried out to measure parameters and they are tabulated for the comparison. Similarly, another linear regulator is designed where pass element is a NMOS transistor. After the analysis of stability and performance parameters, SPICE simulation is conducted. The performance parameters of both regulators are compared and it is found that NMOS regulator exhibits better performance but low dropout feature of PMOS regulator makes it suitable for low power applications
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