AOZ2260AQI-18 High-Performance Buck Converter | 6A, 28V Input, 1MHz | AOS
AOZ2260AQI-18: Advanced 6A Synchronous Buck Converter for High-Efficiency Power Conversion
The AOZ2260AQI-18 from Alpha & Omega Semiconductor (AOS) represents the pinnacle of switching regulator technology, delivering unparalleled performance in voltage regulation for modern electronic systems. As a fully synchronous step-down DC-DC converter, this power management IC combines high efficiency with robust design to meet the demanding requirements of industrial, automotive, and consumer applications.
In-Depth Technical Specifications
Wide-Range Voltage Compatibility
Engineered for versatility, the AOZ2260AQI-18 accepts input voltages from 4V to 28V, making it compatible with:
- 12V/24V industrial power systems
- Automotive battery voltages (including load-dump scenarios)
- 5V/12V/19V adapter inputs
- Multi-cell Li-ion battery packs (2S to 6S configurations)
Precision Output Regulation
The device provides adjustable output voltage from 0.8V to 24V with 1.5% output voltage accuracy, supporting:
- Low-voltage processors and FPGAs (0.8V-1.8V cores)
- 3.3V/5V system rails
- High-power peripherals (12V/24V motors)
High-Current Performance
With 6A continuous output current capability, the AOZ2260AQI-18 features:
- Low RDS(ON) MOSFETs (35m high-side, 20m low-side)
- Peak efficiency up to 95%
- Thermal shutdown protection
- Cycle-by-cycle current limiting
Advanced Features for Optimal Performance
High-Frequency Operation
The 1MHz fixed switching frequency enables:
- Smaller inductor sizes (2.2 H typical)
- Reduced output ripple
- Minimized EMI footprint
- Fast transient response
Intelligent Power Management
Integrated protection features include:
- Input undervoltage lockout (UVLO)
- Output overvoltage protection (OVP)
- Thermal shutdown with hysteresis
- Soft-start functionality (programmable)
Package and Thermal Considerations
The 23-QFNA (4x4mm) PowerTFQFN package offers:
- Exposed thermal pad for enhanced heat dissipation
- 0.5mm pitch for easy PCB routing
- JEDEC Level 3 moisture sensitivity
- RoHS-compliant construction
Comprehensive Application Guide
Typical Application Circuit
A complete power solution requires only:
- Input capacitors (10 F ceramic + 100 F electrolytic)
- Output capacitors (22 F ceramic)
- 2.2 H power inductor (6A saturation current)
- Feedback resistors (for voltage adjustment)
Design Optimization Tips
- Place input capacitors within 5mm of VIN pins
- Use wide PCB traces for high-current paths
- Implement proper ground plane for thermal management
- Keep sensitive analog components away from switching nodes
Industry-Leading Performance Benchmarks
| Parameter | Value | Conditions |
|---|---|---|
| Efficiency | 95% (peak) | VIN=12V, VOUT=5V, 3A |
| Quiescent Current | 40 A | No load, PWM mode |
| Line Regulation | 0.5% | VIN=8V-28V |
| Load Regulation | 1% | 0A-6A load step |
Comparative Advantages Over Competing Solutions
The AOZ2260AQI-18 outperforms alternatives by offering:
- Higher Input Voltage Range (28V vs typical 18V competitors)
- Smaller Solution Size (30% smaller than discrete designs)
- Lower BOM Cost (Integrated MOSFETs eliminate external components)
- Wider Temperature Operation (-40 C to +85 C full performance)
Frequently Asked Questions
Q: Can the AOZ2260AQI-18 operate from automotive 24V systems?
A: Yes, the 28V maximum input voltage comfortably accommodates 24V automotive systems, including load dump transients.
Q: What thermal performance can be expected at full 6A load?
A: With proper PCB layout (2oz copper, 4-layer board), typical temperature rise is 35 C above ambient at 25 C.
Q: Is external compensation required?
A: No, the AOZ2260AQI-18 features internal compensation for simplified design.
Ordering Information and Resources
The AOZ2260AQI-18 is available in tape-and-reel packaging (3000 units per reel). Reference designs, SPICE models, and layout guidelines are available on the AOS website. For volume pricing and samples, contact authorized distributors.
For engineers seeking a reliable, high-performance buck converter solution, the AOZ2260AQI-18 delivers exceptional value through its combination of power density, efficiency, and design flexibility.