ADP3120A datasheet in PDF form, 195 KB, covering a dual bootstrapped MOSFET driver now supplied by ON Semiconductor. Drivers like this switch the high-side and low-side transistors of a CPU core or other multiphase buck converter. Technicians use the pin description to check the bootstrap, PWM input and gate drive outputs with a scope or multimeter when a phase is dead or a MOSFET keeps failing. Verify the marking on the board chip, since several driver families share similar packages and pinouts are not always interchangeable.
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