Buck regulator with ultrasonic mode and 5V LDO from Alpha and Omega
Date: 16/07/2023
Alpha and Omega Semiconductor introduced a new family of application-specific EZBuck regulators. The highly integrated AOZ2295QI-05 has the most compact footprint in the industry to support 5V rails in desktop and laptop computing systems.
High-performance, personal computing systems, supporting add-on features, and more USB type-C ports, increase the 5V output current to more than 10A today. In such feature-rich personal computing systems, typical power implementations require either a controller with external discrete power FETs or two low-current converters to achieve the high current required of the 5V rail. This results in increased component count and larger PCB area, increasing system cost. In contrast, AOS’ highly integrated solution includes all the power silicon in a single, thermally enhanced QFN 4mm x 4mm package for 12A, providing a compact solution size with industrial-leading efficiency and thermal performance.
Technical Highlights
• The AOZ2295QI-05 converter includes features specifically designed to meet key requirements of the 5V
rail. The AOZ2295QI-05 is designed with a T ON extension mode so the converter can still output stable 5V
while the battery cell voltage drops to 5.5V.
• In many practical design and application environments, there is also a high possibility of having audible
noise when system 5V goes to light load with less than 20kHz switching frequency. AOS’ proprietary
Constant On-Time architecture provides an ultrasonic mode to guarantee operating frequency working
above 30kHz to prevent audible noise in the full application range.
• The new device also features a high level of integration and protection features of the AOS EZBuck
product family; featuring a PGOOD output, an integrated bootstrap diode, and an integrated soft start.
Protection features include cycle-by-cycle current limit, short-circuit protection (SCP), Overvoltage
Protection (OVP), and Thermal shutdown.
Key Features
• Wide input voltage range: 5.5V to 25V
• High Current Capability: 12A
• High Peak Current: 16A
• Low RDS(ON) internal NFETs: 7mO HS FET, 3.6mO LS FET
• 5V LDO Output
• T ON Extension Mode
• Ultrasonic Mode
• Thermally enhanced 4mm x 4mm QFN package to support up to 60W output power
“The load current capability of the AOZ2295QI-05 offers designers an easy-to-use solution to support high power 5V system in a compact size. In today’s ever-shrinking desktop motherboard or laptop form factors, PCB real estate is at a premium. Utilizing AOS’ EZBuck TM regulator technology enables AOS to ease the job of the system
designer,” said Wayne Lee, Power IC Marketing at AOS.
Pricing and Availability
The AOZ2295QI-05 is immediately available in production quantities with a lead time of 12 weeks. The unit price for 1,000 pieces is $1.48 for the AOZ2295QI-05.
