The ADP1822's regulated output can track another power supply and be dynamically adjusted up or down with the controller's margining-control inputs, making it ideal for high reliability applications. It is well suited for a wide range of high power applications, such as DSP power and processor core power in telecom, medical imaging, high performance servers, and industrial applications. It operates from a 3.0 V to 5.5 V supply with power input voltage ranging from 1.0 V to 24 V. The ADP1822 can operate at any frequency between 300 kHz and 1.2 MHz either by synchronizing with an external source or an internally generated, logic-controlled clock of 300 kHz or 600 kHz. It includes an adjustable soft start to allow sequencing and quick power-up while preventing input inrush current. Output reverse-current protection at startup prevents excessive output voltage excursions. The adjustable virtually lossless current-limit scheme reduces external part count and improves efficiency.