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TOREX XC9306

6MHz Synchronous Buck-Boost DC/DC Converter in Tiny WLP-20 Package

Providing a regulated output voltage from an input supply that can be higher or lower than the output voltage, the XC9306 synchronous buck-boost DC/DC converter is ideal for  Lithium ion applications where the output voltage is within the battery voltage range. A fully charged Li-ion battery starts at a high operating voltage, but as the battery is discharged its operating voltage declines to the point it can no longer provide sufficient voltage to power its load, even if some charge remains. The XC9306 can extend the usable life of a battery by boosting (stepping up) the output voltage to provide sufficient power to continue operation. This extends battery life by more efficiently using the remaining charge of the battery.

The XC9306 uses 6MHz switching frequency that allows for a smaller size inductor and capacitors, reducing the overall mounting area by as much as half. The buck-boost converter is based on a fixed frequency, PWM controller using synchronous rectification to obtain maximum efficiency. At low load currents, the converter can be switched over to PFM mode (MODE pin: L) to maintain high efficiency over a wide load current range. The input current can be limited to a typical value of 3.1, 1.3 or 0.49A. The output voltage is programmable using an external resistor divider.   

The input voltage range is from 2.5V to 5.5V and the output voltage can be set externally, using resistors, within a range of 0.8V to 5.0V. Output currents up to 800mA can be supported.

The XC9306 is available in an ultra small WLP-20 package which measures only 2.15mm x 1.94mm x 0.625mm!

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XC9306 in a Tiny WLP-20 Package

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