New synchronous buck regulator with enhanced light load efficiency and lower output voltage
Alpha and Omega Semiconductor (AOS) announced the release of the AOZ6605, a high efficiency and simple-to-use synchronous step-down regulator with PWM switching frequency of 650 kHz and input voltage range of 4.5 V to 18 V. The solution is ideal for consumer, networking and industrial applications such as LCD TVs, set-top boxes, cable modems, and power supplies.
Leveraging AOS's co-package EZBuck™ design, the AOZ6605 integrates a 55 mΩ high-side and 12 mΩ low-side MOSFET, and provides 5 A of continuous output current at over 90% efficiency and maintains it at 86% efficiency while in 10 mA light load operation.
When operating in low output current conditions, the AOZ6605 will operate in an ultra pulse energy mode (U-PEM) to obtain high efficiency. Under heavy load steady-state conditions, the AOZ6605 will operate in fixed frequency and Continuous-Conduction Mode (CCM).
|Input Range||4.5 V to 18 V||4.5 V to 18 V|
|FET On-resistance (typ)||High-side: 55 mOhms
Low-side: 12 mOhms
|High-side: 68 mOhms
Low-side: 37 mOhms
|Efficiency at 5 A||92%||89%|
|Thermal (5 A)||70.9 °C||74.9 °C|
The AOZ6605 is immediately available in production quantities with a lead-time of 12 weeks. The unit price of 1,000 pieces is $1.30.
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