Overview
The AOZ1282CI is a high-efficiency, simple-to-use 1.2A buck regulator produced by Alpha & Omega Semiconductor Inc. This regulator operates within a wide input voltage range of 4.5V to 36V and provides up to 1.2A of continuous output current. The output voltage is adjustable down to 0.8V, making it versatile for various applications. The AOZ1282CI features a fixed 450kHz PWM operation, which reduces the size of the inductor required, and includes internal compensation and soft-start capabilities. It is packaged in a SOT23-6L package, making it compact and suitable for space-constrained designs.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5V to 36V |
| Output Current | Up to 1.2A |
| Output Voltage Range | Adjustable down to 0.8V |
| Switching Frequency | Fixed at 450kHz |
| Internal NMOS Resistance | 420mΩ |
| Efficiency | Up to 95% |
| Maximum Duty Cycle | 87% |
| Minimum On Time | 150 ns |
| Current Limit | 1.5 to 1.9 A |
| Thermal Shutdown Limit | TJ rising: 150°C, TJ falling: 110°C |
| Soft Start Interval | 1.5 ms |
| Package | SOT23-6L |
Key Features
- High efficiency up to 95%
- Internal compensation and soft-start
- Enable control, under-voltage lock-out, output over-voltage protection, over-current protection, and thermal shutdown
- Fixed 450kHz PWM operation reducing inductor size
- Adjustable output voltage down to 0.8V using an external resistor divider network
- Internal high-side NMOS switch with 420mΩ on-resistance
- Compact SOT23-6L package
Applications
The AOZ1282CI is suitable for a variety of applications requiring efficient and reliable DC-DC conversion. These include:
- Portable electronics and battery-powered devices
- Industrial control systems and automation
- Automotive systems requiring high efficiency and reliability
- Consumer electronics such as set-top boxes, routers, and other network devices
- Medical devices and equipment requiring stable and efficient power supply
Q & A
- What is the input voltage range of the AOZ1282CI?
The AOZ1282CI operates from a 4.5V to 36V input voltage range. - What is the maximum output current of the AOZ1282CI?
The AOZ1282CI provides up to 1.2A of continuous output current. - How is the output voltage adjusted on the AOZ1282CI?
The output voltage can be adjusted using an external resistor divider network connected to the FB pin. - What is the switching frequency of the AOZ1282CI?
The switching frequency is fixed at 450kHz. - What are the key protection features of the AOZ1282CI?
The AOZ1282CI includes enable control, under-voltage lock-out, output over-voltage protection, over-current protection, and thermal shutdown. - What is the package type of the AOZ1282CI?
The AOZ1282CI is packaged in a SOT23-6L package. - What is the efficiency of the AOZ1282CI?
The AOZ1282CI has an efficiency of up to 95%. - How does the AOZ1282CI handle thermal issues?
The AOZ1282CI features thermal shutdown with limits of TJ rising: 150°C and TJ falling: 110°C. - What is the on-resistance of the internal NMOS switch in the AOZ1282CI?
The internal NMOS switch has an on-resistance of 420mΩ. - Is the AOZ1282CI suitable for high-current applications?
Yes, the AOZ1282CI is designed to handle up to 1.2A of continuous output current and includes over-current protection.
