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RT9917 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9917 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 20 page  1 DS9917-03 April 2011 www.richtek.com RT9917 Pin Configurations 7 Channel DC/DC Converters General Description The RT9917 is a complete power-supply solution for digital still cameras and other hand-held devices. It integrates : CH1 : Boost DC-DC converter with load disconnect controller (SW1). CH2 : Selectable Boost/Buck DC-DC converter CH3 : Step-down DC-DC converter with internal compensation. CH4 : Step-down DC-DC converter with internal compensation. CH5 : DC/DC converter with HV NMOS, internal compensation and load disconnect (SW5) for CCD positive supply. CH6 : DC/DC converter with HV PMOS for CCD negative supply. CH7 : WLED driver with HVNMOS, internal compensation and allow for PWM dimming. SW1 : Load disconnect controller for CH1. SW5 : Load disconnect switch for CH5. Features 1 Channel Boost/Buck Selectable by SEL Pin 2 Selectable On/Off Sequence Set by SEQ Pin 4 Channels with Internal Compensation Provide Charge Pump Voltage to Enhance NMOS Gate Driving Capability for Alkaline Battery Input All Power Switches Integrated Syn Step-Down DC/DC Converter Up to 95% Efficiency 100% (MAX) Duty Cycle Syn Step-Up DC/DC Converter Adjustable Output Voltage Up to 95% Efficiency Open LED Protection Transformerless Inverting Converter for CCD Fixed 1MHz Switching Frequency Compact 40-Lead WQFN Package RoHS Compliant and 100% Lead (Pb)-Free Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Applications Digital Still Camera PDA Portable Device (TOP VIEW) WQFN-40L 5x5 30 29 28 27 26 25 24 23 22 21 31 32 33 34 35 36 37 38 39 40 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PVDD2 VDDM CFB7 GND LX7 LX5 VOUT7 FB3 EN7 LX3 PVDD1 PVDD6 CP CN CPO FB6 FB4 COMP6 LX4 GND LX6 41 RT9917 Package Type QW : WQFN-40L 5x5 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) |
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