Alpha and Omega Semiconductor Launches 5A EZBuck DC-DC Regulator with Ultra Pulse Energy Mode (U-PEM)

Alpha and Omega AOZ6605

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.

Alpha and Omega - AOZ6605

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).

Technical Highlights

  AOZ6605 Major Competitor
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
Package Epad-SO8 Epad SO-8
Efficiency at 5 A 92% 89%
Thermal (5 A) 70.9 °C 74.9 °C

Device Spec Table

Part Number Operating
Min (V)
Max (V)
Max Load
Current (A)
AOZ6643 4.5 18 3 0.8 V 500 No Internal DFN3X3-8L
AOZ6622 4.5 18 2 0.8 V 550 Yes Internal DFN3X3-8L
AOZ6623 4.5 18 3 0.8 V 550 Yes Internal DFN3X3-8L
AOZ6605 4.5 18 5 0.6 V 650 Yes External DFN3X3-8L

Pricing and Availability

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.

JLCPCP: 2USD 2Layer 5PCBs, 5USD 4Layer 5PCBs

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