RT9953 4+1 CH Power Management IC Datasheet
●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 1/O power
●CH2 is a selectable synchronous step-up/step-down output for motor or DSC system 1/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.
●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
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[ CMOS Digital Still Camera ][ CMOS DV ][ Portable Devices ] |
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Datasheet |
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Please see the document for details |
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WQFN-24L |
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English Chinese Chinese and English Japanese |
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April 2011 |
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DS9953-02 |
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719 KB |
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