This paper describes a low voltage CMOS operational amplifier, which is capable of driving heavy resistive and capacitive loads. Robust and power efficient compensation is achieved by using Miller compensation together with a high bandwidth stage. Measurements show that the amplifier achieves 5.7 MHz unity gain frequency and 61/spl deg/ phase margin when driving 1nF/spl par/1k/spl Omega/ load, while drawing 2.4mA from 1.5V supply. At 3.0V supply the amplifier is able to source or sink more than 100 mA into 1nF/spl par/10/spl Omega/ load.