The RT9999P is a highly integrated power management IC that contains 7-CH switching DC/DC converters, one generic LDO, one Keep Alive low quiescent LDO, a switch with reverse leakage prevention from backup battery, and a Real-Time Clock (RTC) that includes a time counter and a 32768Hz oscillator for DSC applications.
The DC/DC converters include one low voltage step-up operated in either asynchronous PFM or synchronous PWM, one current mode synchronous step-up/down (buck boost), two synchronous step-downs, one high voltage synchronous step-up for CCD+ with load disconnect, one asynchronous inverter for CCD-, and one WLED driver operated in either synchronous step-up mode or constant current source mode. All power MOSFETs are integrated and compensation networks are built in.
The RT9999P uses I2C interface to set power on timing, output voltage, and WLED current and dimming level. The I2C is also used to access RTC time counters and oscillator fine tuning.
The RT9999P provides comprehensive protection functions, including over current, under voltage, over voltage, over temperature, and over load.
The RT9999P is available in a WQFN-40L 5x5 package.
Applications
- Digital Cameras
- Portable Instruments