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 3A SYNCHRONOUS BUCK REGULATOR         
 DESCRIPTION    The UTC USR1021 is a high efficiency, 3A synchronous buck  regulator. The UTC USR1021 works from a 6V to 18V input  voltage range, and provides up to 3A of continuous output current  with an output voltage adjustable down to 0.8V.    The UTC USR1021 comes in an SOP-8 packages and is rated  over a -40°C~+85°C ambient temperature range.     FEATURES     * 6V~18V operating input voltage range  * High efficiency  * Internal soft start  * 1.5% initial output accuracy  * Output voltage adjustable to 0.8V  * 3A continuous output current  * Cycle-by-cycle current limit  * 500kHz PWM operation  * Thermal shutdown  * Short-circuit protection |