Synchronous buck converter smart power stage AOS AOZ5273QI with ultra low conduction loss and fast switching capabilities
Product Overview
The AOZ5273QI is a high-current, high-performance Smart Power Stage (SPS) designed for DC-DC converters. It integrates two asymmetrical MOSFETs and a driver, offering an output voltage signal (IMON) for real-time current monitoring with a gain of 5mV/A, eliminating the need for external temperature compensation in multiphase systems. The device also features an accurate module temperature monitor (TMON) with a gain of 8mV/C. Optimized for synchronous buck configurations, the High-Side (HS) MOSFET is designed for low capacitance and gate charge for fast switching, while the Low-Side (LS) MOSFET offers ultra-low ON resistance for minimal conduction loss. The compact 5mm x 6mm QFN package minimizes parasitic inductance for reduced EMI. Applications include server systems, high-end CPU/GPU power stages, and communications infrastructure.
Product Attributes
- Brand: AOS (Alpha and Omega Semiconductor)
- Certifications: RoHS compliant, AOS Green Products (reduced levels of Halogens)
- Package Type: QFN5x6-39L
Technical Specifications
| Specification | Details |
|---|---|
| Power Supply Range | 3V to 20V |
| HS MOSFET Voltage Rating | 30V |
| Continuous Output Current | 70A |
| Pulsed Output Current (10ms) | Up to 100A |
| Pulsed Output Current (10s) | Up to 150A |
| Optimized Switching Frequency | Up to 1MHz |
| Current Monitor (IMON) Gain | 5mV/A |
| Current Monitor Accuracy | 5% over temperature |
| Temperature Monitor (TMON) Gain | 8mV/C |
| Temperature Monitor Accuracy | 2% |
| Junction Temperature Range | -40C to 125C |
| Fault Indicator | Yes |
| Under-Voltage LockOut (UVLO) | On VCC and VIN |
| High-Side MOSFET Protection | Over-Current and Short-Circuit Protection |
| Zero Current Detect Function (ZCD) | Yes |
| Over Temperature Protection (OTP) | Yes |
| PreOVP | Active / Disabled (Model dependent) |
| Part Number | AOZ5273QI, AOZ5273QI-01 |
| Package Dimensions | QFN5x6-39L |
| IMON Reference Voltage (REFIN) | 0.7V to 2.0V (Nominal 1.2V) |
| TMON Output Voltage (0C, normal operation) | 0.6V |
2410301808_AOS-AOZ5273QI_C3615347.pdf
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