Torex Semiconductor Ltd has launched the XD9267/XD9268 Series of AEC-Q100 Compliant, 600mA synchronous step-down DC-DC converters with an internal 36V operation driver transistor.
The input voltage range is 3V to 36V (absolute maximum rating 40V), the output voltage range is 1V to 25V, and the oscillation frequency is 2.2MHz. For the operation mode, PWM control (XD9267) or PWM/PFM automatic switching control (XD9268) can be chosen to deliver high efficiency and a low ripple voltage over a wide load range from light to heavy loads. Switching from a regulator to the light load (1mA) efficiency of 82% and what is claimed to be the world’s smallest 36V synchronous step-down DC/DC converter means considerably increasing efficiency by half and significantly decreasing the mounted surface area by 50%.
The soft-start time is internally set to 2ms (TYP.), but can be altered to set a longer time utilising resistor and capacitor. Over-current limiting, UVLO, and thermal shutdown are offered as internal protective functions. Also, the output state can be monitored employing the power good function.
The SOT-89-5 package or the small USP-6C package (1.8mm x 2mm x 0.6mm) is optional to match the application.