A 0.003-Mm(2) 50-Mw Three-Stage Amplifier Driving 10-Nf With 2.7-Mhz Gbw

This paper presents a power- and area-efficient three-stage amplifier suitable to drive high capacitive loads. The amplifier is compensated by a single Miller Capacitor and an additional feedforward stage. To improve the amplifier large signal transient response, the topology also includes an external feed-forward path and a novel slew-rate enhancer section. Implemented in a 0.35-mu m CMOS process, the amplifier occupies less than 0.003-mm(2) of die area. When driving a 10-nF load, it provides 2.7-MHz gain-bandwidth product and 0.55-V/mu s average slew-rate, while consuming only 25-mu A quiescent current from 2-V supply.