The MAX889RESAT is a high frequency, regulated, inverting charge pump switching voltage regulator from Analog Devices. It provides up to 200mA of output current at an adjustable voltage from 1.2V to 5V, and features ultra-low ripple noise of 0.3mVp-p. The device helps to reduce external component count and cost, and can operate in step-up, step-down, or dual mode, making it suitable for a variety of applications. Additionally, the MAX889RESAT is optimized for low quiescent current and operates at an input voltage range from 0.45V to 5.5V. It is available in an ultra-small 5-pin SOT-23 package for space-saving design.