Compact 5mm by 5mm QFN package synchronous buck converter AOS AOZ5039QI optimized for low conduction losses
Product Overview
The AOZ5039QI is a high-efficiency synchronous buck power stage module designed for demanding applications. It integrates two asymmetrical MOSFETs and a driver, with each MOSFET optimized for its role in the synchronous buck configuration. The high-side MOSFET is engineered for fast switching at low duty cycles, while the low-side MOSFET offers ultra-low ON resistance to minimize conduction losses. Housed in a compact 5mm x 5mm QFN package, it minimizes parasitic inductance for reduced EMI. The AOZ5039QI supports TTL and Tri-state compatibility via PWM and FCCM inputs, offering features like an integrated bootstrap diode, diode emulation mode for asynchronous operation, and an optimized pin-out for low-inductance routing. It is suitable for use in servers, notebook computers, VRMs for motherboards, point-of-load DC/DC converters, memory and graphic cards, and video gaming consoles.
Product Attributes
- Brand: AOS (Alpha and Omega Semiconductor)
- Certifications: RoHS compliant, AOS Green Products (reduced levels of Halogens)
- Package Type: QFN5x5_31L
Technical Specifications
| Parameter | Rating | Unit |
|---|---|---|
| Product Name | AOZ5039QI | |
| Continuous Output Current | 40 | A |
| Peak Output Current | 50 | A |
| Power Supply Range (VIN) | 4.5 to 25 | V |
| Driver Supply Range (PVCC, VCC) | 4.5 to 5.5 | V |
| Switching Frequency | Up to 2 | MHz |
| Integrated Bootstrap Diode | Yes | |
| Control Input Compatibility | Tri-state PWM input compatible | |
| Shutdown Control | Single FCCM pin control | |
| Protection Features | Under-Voltage LockOut (UVLO) | |
| Package Dimensions | 5mm x 5mm | |
| Operating Temperature Range | -40 to +85 | C |
| Absolute Maximum Rating: VIN | 30 | V |
| Absolute Maximum Rating: VCC, PVCC | 7 | V |
| Absolute Maximum Rating: Storage Temperature | -65 to +150 | C |
| Absolute Maximum Rating: Max Junction Temperature | 150 | C |
| Recommended Operating Condition: VIN | 4.5 to 25 | V |
| Recommended Operating Condition: PVCC, (BOOT-VSWH) | 4.5 to 5.5 | V |
| Recommended Operating Condition: Operating Frequency | 200kHz to 2 | MHz |
| Electrical Characteristics: VCC UVLO Rising | 3.5 to 3.9 | V |
| Electrical Characteristics: VCC UVLO Hysteresis | 500 | mV |
| Electrical Characteristics: VPWMH (PWM High Threshold) | 4.1 | V |
| Electrical Characteristics: VPWML (PWM Low Threshold) | 0.7 | V |
| Electrical Characteristics: VTRI (PWM Tri-State Threshold Window) | 1.65 to 3.50 | V |
| Electrical Characteristics: VFCCMH (FCCM Enable Threshold) | 3.8 | V |
| Electrical Characteristics: VFCCML (FCCM Disable Threshold) | 1.2 | V |
| Gate Driver Timing: tPDLL (PWM Falling to GH Turn-Off) | 18 | ns |
| Gate Driver Timing: tPDLL (PWM Raising to GL Turn-Off) | 25 | ns |
| Gate Driver Timing: tPDHU (GL Falling to GH Rising Deadtime) | 20 | ns |
| Gate Driver Timing: tPDHL (GH/VSWH Falling to GL Rising Deadtime) | 20 | ns |
| Gate Driver Timing: tTSSHD (Tri-State Shutdown Delay) | 135 | ns |
| Gate Driver Timing: tPTS (Tri-State Propagation Delay) | 35 | ns |
| Gate Driver Timing: tLGMIN (Low-Side Minimum On-Time) | 600 | ns |
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