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RT9986 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9986 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 24 page  1 DS9986-00 May 2011 www.richtek.com RT9986 7-CH DC/DC Converter for DSC General Description The RT9986 is a complete 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/step- down 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/current- source 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 component topology. For the RT9986, all 7-CHs have built in internal compensation. 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 comprehensive protection features including over current protection, thermal shutdown protection, over voltage protection, overload protection, and under voltage protection. Features 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 Compensation All Power Switches Integrated All Step-Up Converter with Load Disconnect Step-Down DC/DC Converter Up to 95% Efficiency 100% (max) Duty Cycle Low Voltage Step-Up DC/DC Converter Adjustable Output Voltage Up to 95% Efficiency WLED Driver Auto-Selected by External Topology Current Source Mode with 30mA DC Current Step-Up Mode with LED Open Protection (OVP7) Direct PWM Dimming Control Fixed 2MHz Switching Frequency for CH1/2/3/4, Fixed 1MHz Switching Frequency for CH5/6/7 Small 32-Lead WQFN Package RoHS Compliant and Halogen Free Applications Digital Still Camera PDA Portable Devices Marking Information 13= : Product Code YMDNN : Date Code 13=YM DNN |
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