This post explains for the semiconductor Z1051PI.
The Part Number is AOZ1051PI.
The function of this semiconductor is Synchronous Buck Regulator.
Manufacturers : Alpha & Omega Semiconductors
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The Z1051PI is a high efficiency, easy to use, 3 A synchronous buck regulator. The AOZ1051PI works from 4.5 V to 18 V input voltage range, and provides up to 3 A of continuous output current with an output voltage adjustable down to 0.8 V. The AOZ1051PI comes in an exposed pad SO-8 package and is rated over a -40 °C to +85 °C operating ambient temperature range.
4.5 V to 18 V operating input voltage range z Synchronous Buck: 70 mΩ internal high-side switch and 40 mΩ internal low-side switch (at 12 V) z Up to 95 % efficiency z External soft start z Output voltage adjustable to 0.8 V z 3 A continuous output current z 500 kHz PWM operation z Cycle-by-cycle current limit z Pre-bias start-up z Short-circuit protection z Thermal shutdown z Exposed pad SO-8 package Applications z Point of load DC/DC converters z LCD TV z Set top boxes z DVD and Blu-ray players/recorders z Cable modems Typical Applica […]