ACT8700

ACT8700 Rev PrA 08/2006 Advanced Product Information—All Information Subject to Change FOUR CHANNEL INTEGRATED POWER MANAGEMENT IC FOR HANDHELD PORTABLE EQUIPMENT FEATURES Four Integrated Regulators 350mA PWM Step-Down DC/DC 500mA PWM Step-Down DC/DC Step-Up DC/DC for WLED Bias Complete Li+ Battery Charger GENERAL DESCRIPTION The ACT8700 is a complete, cost-effective ActivePMU™ power management solution with multiple patents pending for portable handheld equipment. This device integrates all four regulators required for small portable devices — two step-down DC/DCs for processor core and I/O power, a step-up DC/DC for WLED bias, and a complete, stand-alone Li+ battery charger — into a single, space-saving package. REG1 and REG2 are fixed-frequency, current-mode PWM step-down DC/DC converters that are capable of supplying up to 350mA and 500mA, respectively. REG1 and REG2 are available with a variety of factory-preset output voltage combinations. REG3 is a fixed-frequency, step-up DC/DC converter that provides efficient display backlight bias to a string of up to six white-LEDs. Finally, the ACT8700 also contains a complete, thermally-regulated, standalone single-cell Li+ charger. The ACT8700 is available in a tiny 4mm x 4mm 24pin Thin-QFN package that is just 0.75mm thick. Minimal External Components 4x4mm, Thin-QFN44-24 (TQFN) Package APPLICATIONS Portable Media Players Digital Camera Modules GPS Receivers PDAs ACT8700 contains circuitry with multiple pat...