Overview
The AOZ1282CI is a high-efficiency, simple-to-use, 1.2A buck regulator produced by Alpha & Omega Semiconductor Inc. This regulator is highly flexible and can be optimized for a variety of applications. It operates from 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 different power requirements. The fixed switching frequency of 450kHz PWM operation helps in reducing the inductor size, simplifying system design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 36 | V |
| Maximum Output Current | 1.2 | A |
| Minimum Output Voltage | 0.8 | V |
| Maximum Output Voltage | 30 | V |
| Package Type | SOT23-6L | |
| Control Mode | PWM | |
| Operating Frequency | 450 | kHz |
| Quiescent Current | 1000 | μA |
| Soft Start Time | 1.5 | ms |
| High-Side FET RDS(ON) | 420 | mΩ |
| Maximum Duty Cycle | 87% | |
| Thermal Shutdown Limit | 150°C (rising), 110°C (falling) | °C |
Key Features
- Wide input voltage range from 4.5V to 36V
- Up to 1.2A continuous output current
- Output voltage adjustable down to 0.8V
- Fixed 450kHz PWM operation
- Internal compensation and soft-start
- High efficiency up to 95%
- Internal high-side NMOS switch with 420mΩ RDS(ON)
- Cycle-by-cycle current limit and short-circuit protection
- Thermal shutdown protection
- Compact SOT23-6L package
Applications
- Point of load DC/DC conversion
- Set-top boxes and cable modems
- DVD drives and hard disk drives (HDDs)
- LCD monitors and TVs
- Telecom, networking, and datacom equipment
Q & A
- What is the AOZ1282CI?
The AOZ1282CI is a high-efficiency, 1.2A buck regulator with a wide input voltage range and adjustable output voltage, designed for various applications.
- What is the input voltage range of the AOZ1282CI?
The input voltage range is from 4.5V to 36V.
- What is the maximum output current of the AOZ1282CI?
The maximum output current is up to 1.2A.
- How is the output voltage adjusted in 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 protection features does the AOZ1282CI have?
The AOZ1282CI includes over-current protection, short-circuit protection, and thermal shutdown protection.
- In what package is the AOZ1282CI available?
The AOZ1282CI is available in a compact SOT23-6L package.
- What is the efficiency of the AOZ1282CI?
The AOZ1282CI has an efficiency of up to 95%.
- Does the AOZ1282CI have internal compensation and soft-start?
Yes, the AOZ1282CI has internal compensation and soft-start features.
- What are some typical applications of the AOZ1282CI?
Typical applications include point of load DC/DC conversion, set-top boxes, cable modems, DVD drives, HDDs, LCD monitors, TVs, and telecom/networking/datacom equipment.
- How does the AOZ1282CI protect against thermal issues?
The AOZ1282CI has thermal shutdown protection with limits set at 150°C (rising) and 110°C (falling).
