DC/DC转换器和控制器 XC9253R

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概要

The XC9253R series is a group of synchronous-rectification type DC/DC converters with a built-in 0.6ΩP-channel driver transistor and 0.7ΩN-channel switching transistor, designed to allow the use of ceramic capacitors. The ICs enable a high efficiency, stable power supply with an output current of 500mA to be configured using only a coil and two capacitors connected externally. Minimum operating voltage is 2.0V~6.0V. Output voltage is 3.3V(accuracy: ±2.0%). With the built-in oscillator, oscillation frequency is set to 600kHz. As for operation mode, the XC9253R series is automatic PWM/PFM switching control allowing fast response, low ripple and high efficiency over the full range of load (from light load to high output current conditions). ,The soft start and current control functions are internally optimized. During standby, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 1.4V or lower. Two types of package, SOT-25 and USP-6B, are available.

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