Low-dropout regulator with dual cross-coupled current mirrors

Summary

A low-dropout regulator (LDO) based on dual cross-coupled current mirrors is reported in this paper. The proposed dual cross-coupled current mirrors boost output signal current such that the loop gain of LDO is significantly enhanced, and the error amplifier in LDO retains single-pole property within the loop bandwidth of LDO. Designed in a 65-nm CMOS process and operating at a minimum of 1-V supply, the proposed LDO provides a 0.8-V output and delivers a maximum of 50 mA. The figure-of-merit of the proposed LDO is 8.9 ps.