New Series of DrMOS for Multiphase Regulators Powering High Performance GPU and Memory Cards

Alpha and Omega Semiconductor Limited (AOS) have introduced a new series of DrMOS targeting multiphase VR regulators powering high-performance GPU and memory in desktop Add-In Graphics Cards (AICs) and gaming notebooks. The AOZ531xQI series makes use of AOS latest generation of Gen Alpha MOSFET technology to provide enhanced performance.

The series comes in 5mm x 5mm QFN package and comprises of three DC current levels for multiphase voltage regulator optimization. It supports high peak currents common in a GPU multiphase VR and ensures great performance and robustness. All devices in the AOZ531xQI family features high peak current capability, up to 120A for 10us and 80A for 10ms.

The AOZ531xQI supports add-in card (12V input) and gaming laptop (20V input) input voltage operating range. There are three performance levels (50A, 60A, and 65A) that allow tradeoffs in the current/phase and number of phases.

Key Features of AOZ531xQI Series

• DC Operating Range: 2.5V to 20V for AOZ5311/2/3QI and 2.5V to 25V for AOZ5316/7/8QI
• Universal standard QFN5x5 package                                  
• Capable of up to 120A for 10us and up to 80A for 10ms
• 3.3V and 5VPWM logic compatible
• True high impedance input at PWM when disabled for phase shedding operation
• Enables/disables diode emulation mode using #SMOD input

The AOZ531xQI series is available in production quantities with a lead-time of 12 weeks. The unit is available in 1,000 pieces quantities and wears a price tag of $1.24 for AOZ5311xQI, $1.35 for AOZ5312xQI, $2.10 for AOZ5313xQI, $1.30 for AOZ5316xQI, $1.40 for AOZ5317xQI, $2.20 for AOZ5318xQI.