Buck regulator powers 5

A DC/DC buck regulator, the AOZ2295QI-05 from Alpha & Omega, furnishes 12 A of continuous output current with a 5.1-V output voltage. Housed in a thermally enhanced 4×4-mm QFN package, this compact device supports the 5-V rails in desktop and laptop computing systems.

The AOZ2295QI-05 synchronous EZBuck regulator has a wide input voltage range of 5.5 V to 25 V. It integrates an independent linear regulator to generate a 5.0-V output (VREG5) from the input. If the input voltage is lower than 5.0 V, the linear regulator operates in low dropout (LDO) mode. When the buck regulator is enabled, the VREG5 is switched over to output to save LDO power consumption.

The constant on-time architecture of the AOZ2295QI-05 provides an ultrasonic mode to guarantee the operating frequency is above 30 kHz to prevent audible noise. It also features an on-time extension mode to ensure the 5-V output remains stable. In addition, the part offers multiple protection features, including LDO regulator undervoltage lockout, cycle-by-cycle current limit, short-circuit protection, output overvoltage protection, and thermal shutdown.

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Available in production quantities with a lead time of 12 weeks, the AOZ2295QI-05 EZBuck regulator costs $1.48 each in lots of 1000 units.

AOZ2295QI-05 product page

Alpha & Omega Semiconductor

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