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RT9953 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9953 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 19 page  RT9953 1 DS9953-02 April 2011 www.richtek.com 4+1 CH Power Management IC 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. Features One Synchronous Step-Up/Step-Down Selectable Converter Support 2AA or Li-ion Battery Applications Internal Soft-Start Control 4 CHs with Internal Compensation Power Switches Integrated Up to 95% Efficiency 100% (max) Duty Cycle for Step-Down Converter Adjustable Output Voltage Fixed 1MHz Switching Frequency LDO Works with Low-ESR Ceramic Capacitors Fast Line/Load Transient Response High PSRR Linear Regulator RoHS Compliant and Halogen Free General Description The RT9953 is a complete power supply solution for digital still cameras and other handheld devices. The RT9953 is a multi-CH power management IC including one synchronous step-up DC/DC converter, one selectable synchronous step-up/step-down DC/DC converter, two synchronous step-down DC/DC converters, and one low dropout linear regulator. The RT9953 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 500mA, low dropout, low noise linear regulator with soft-start function. The RT9953 is designed to support Li+ and 2AA battery applications. The selectable step-up/step-down converter can be set by SEL pin. For the synchronous step-up and step down converters, the efficiency can be up to 95%. The RT9953 provides over current protection, thermal shutdown protection, over voltage and under voltage protection to achieve complete protection. The RT9953 is available in the WQFN-24L 4x4 package. Applications CMOS Digital Still Camera CMOS DV Portable Devices Pin Configurations (TOP VIEW) WQFN-24L 4x4 LX1 PVDD1 EN3 FB4 SS PVDD4 LX2 PVDD2 FB3 EN2 PVDD3 VDDM 1 2 3 4 5 6 7 21 20 19 18 17 16 15 89 10 12 14 13 24 22 23 11 GND 25 Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. RT9953 Package Type QW : WQFN-24L 4x4 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) |
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