RT9986 Datasheet | Richtek

7-CH DC/DC Converter for DSC General Description The RT9986 is a plete power supply solution for digital still cameras and other handheld devices. It includes one synchronous step-up DC/DC converter with load disconnect, one selectable synchronous step-up/stepdown DC/DC converter, two synchronous step-down DC/ DC converters, one synchronous high voltage step-up DC/ DC converter, one inverting DC/DC converter, and one selectable synchronous high voltage step-up/currentsource for WLED. In addition, the RT9986 also includes one RTC_LDO, one voltage detector, and one System Reset. All power MOSFETs are addition in the RT9986. The RT9986 is designed to fulfill the applications for DSC as follows : CH1 is a synchronous step-up output for motor or DSC system I/O power CH2 is a selectable synchronous step-up/step-down output for motor or DSC system I/O power CH3 and CH4 are synchronous step-down outputs for DSP core and memory power supply CH5 is a synchronous high voltage step-up output for CCD bias power supply CH6 is an inverting output for negative CCD bias power supply CH7 is a selectable synchronous high voltage step-up/ current source for driving WLED The selectable step-up/step-down converter can be auto selected by external ponent topology. For the RT9986, all 7-CHs have built in internal pensation. The RT9986 also provides a transformerless inverting converter for supplying CCD power. For the low voltage synchronous step-up and step down converters, efficiency can be up to 95%. The RT9986 provides prehensive protection Features including over current protection, thermal shutdown protection, over voltage protection, overload protection, and under voltage protection. z Features z CH2 Step-Up/Step-Down Auto-Selected by External Topology Preset On/Off Sequence of CH1, CH2, CH3, CH4 (1 → 3 → 4 → 2) Preset On/Off Sequence of CH5, CH6 (5 → 6) All Channels with Internal pensation All Power Switches Integrated All Step-Up Converter with Load...