Low-power current-mode 0.9-V voltage regulator

Abstract

A design for a low-power integrated 0.9-V voltage regulator for load currents up to 140 /spl mu/A is presented. The circuit contains no external components and it stabilizes the voltage of a single battery cell of 1.1-1.6 V with a PSRR >40 dB over a frequency range of up to 30 kHz. The regulating circuit operates a current level and accomplishes automatic load-current limiting. Its r.m.s output noise is <4 /spl mu/V over a frequency range of 10 Hz-8 kHz. The quiescent supply current is /spl ap/40 /spl mu/A.< >