LM2788

October 2002 www.DataSheet4U.com LM2788 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter LM2788 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter General Description The LM2788 switched capacitor step-down DC/DC converter efficiently produces a 120mA regulated low-voltage rail from a 2.6V to 5.5V input. Fixed output voltage options of 1.5V, 1.8V, and 2.0V are available. The LM2788 uses multiple fractional gain configurations to maximize conversion efficiency over the entire input voltage and output current ranges. Also contributing to high overall efficiency is the extremely low supply current of the LM2788: 32µA operating unloaded and 0.1µA in shutdown. The optimal external component requirements of the LM2788 solution minimize size and cost, making the part ideal for Li-Ion and other battery powered designs. Two 1µF flying capacitors and two 10µF bypass capacitors are all that are required, and no inductors are needed. The LM2788 also features noise-reducing soft-start circuitry, short-circuit protection and over-temperature protection. Features n Output voltage options: 2.0V ± 5%, 1.8V ± 5%, 1.5V ± 6% n 120mA output current capability n Multi-Gain and Gain Hopping for Highest Possible Efficiency - up to 90% Efficient n 2.6V to 5.5V input range n Low operating supply current: 32µA n Shutdown supply current: 0.1µA n Thermal and short circuit protection n Available in an 8-Pin MSOP Package Applications n n n n n Cellular Phones Pager...