AOZ1280CI 1.2 A Simple Buck Regulator, SOT-23-6 1.5 MHz EZ Buck
Alpha & Omega Semiconductor Inc.
6 Terminals 3V 2-Pin DC DC Voltage Regulator 1 Outputs 1.5MHz Tape & Reel (TR) SOT-23-6









6 Terminals 3V 2-Pin DC DC Voltage Regulator 1 Outputs 1.5MHz Tape & Reel (TR) SOT-23-6
The AOZ1280CI is a high efficiency, simple to use, 1.2 A buck regulator which is flexible enough to be optimized for a variety of applications. This article is going to introduce pinout, features, applications, and other details about the AOZ1280CI regulator. Furthermore, there is a huge range of aos series components in stock. Welcome your RFQ!

How does Buck Converter work? | DC-DC Converter
- What is AOZ1280CI?
- AOZ1280CI Pinout
- AOZ1280CI CAD Model
- Specifications
- AOZ1280CI Block Diagram
- AOZ1280CI Features
- AOZ1280CI Applications
- AOZ1280CI Alternatives
- AOZ1280CI Typical Application Circuit
- Environmental & Export Classifications
- AOZ1280CI Package Outline
- AOZ1280CI Manufacturer
- Parts with Similar Specs
- Trend Analysis
What is AOZ1280CI?
The AOZ1280CI is a 1.2 A buck regulator with great efficiency and ease of use that can be tuned for a range of applications. The AOZ1280CI accepts input voltages ranging from 3 to 26 V and outputs up to 1.2 A of continuous current. The output voltage can be adjusted down to 0.8 volts. The inductor size is reduced by the set 1.5 MHz PWM switching frequency.
The AOZ1280CI is available in a SOT23 -6L package and has a temperature range of -40 to +85 degrees Celsius.
AOZ1280CI Pinout

AOZ1280CI Pinout
AOZ1280CI CAD Model

AOZ1280CI Symbol

AOZ1280CI Footprint

AOZ1280CI 3D Model
Specifications
- TypeParameter
- Factory Lead Time18 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
SOT-23-6 - Number of Pins2
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C TA - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - Series
In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.
EZBuck™ - Published2011
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Number of Terminations6
- Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
DUAL - Terminal Form
Occurring at or forming the end of a series, succession, or the like; closing; concluding.
GULL WING - Terminal Pitch
The center distance from one pole to the next.
0.95mm - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
R-PDSO-G6 - Function
The parameter "Function" in electronic components refers to the specific role or purpose that the component serves within an electronic circuit. It defines how the component interacts with other elements, influences the flow of electrical signals, and contributes to the overall behavior of the system. Functions can include amplification, signal processing, switching, filtering, and energy storage, among others. Understanding the function of each component is essential for designing effective and efficient electronic systems.
Step-Down - Number of Outputs1
- Efficiency
Efficiency in electronic components refers to the ratio of useful output energy or power to the input energy or power. It is a measure of how effectively a component converts input energy into output energy without wasting any energy in the process. Higher efficiency indicates that the component is more effective in performing its intended function while minimizing energy losses. Efficiency is an important parameter in electronic components such as power supplies, amplifiers, and motors, as it directly impacts the overall performance and energy consumption of the system. Manufacturers often specify the efficiency rating of their components to help users understand how efficiently the component operates under different conditions.
95 % - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Adjustable - Voltage - Input (Min)
Voltage - Input (Min) refers to the minimum voltage level that an electronic component requires to operate correctly. It indicates the lowest voltage that can be applied to the component while still allowing it to function as intended. If the input voltage falls below this specified minimum, the component may not perform properly or may fail to operate altogether. This parameter is critical for ensuring reliable operation and longevity of the device in electronic circuits.
3V - Output Configuration
Output Configuration in electronic components refers to the arrangement or setup of the output pins or terminals of a device. It defines how the output signals are structured and how they interact with external circuits or devices. The output configuration can determine the functionality and compatibility of the component in a circuit design. Common types of output configurations include single-ended, differential, open-drain, and push-pull configurations, each serving different purposes and applications in electronic systems. Understanding the output configuration of a component is crucial for proper integration and operation within a circuit.
Positive - Max Output Voltage
The maximum output voltage refers to the dynamic area beyond which the output is saturated in the positive or negative direction, and is limited according to the load resistance value.
26V - Voltage - Output (Min/Fixed)
Voltage - Output (Min/Fixed) refers to the minimum fixed output voltage level that an electronic component, such as a voltage regulator or power supply, is designed to provide under specified load conditions. This parameter ensures that the device consistently delivers a reliable voltage that meets the requirements of the connected circuits or components. It is critical for applications where stable and predictable voltage is necessary for proper operation.
0.8V - Topology
In the context of electronic components, "topology" refers to the arrangement or configuration of the components within a circuit or system. It defines how the components are connected to each other and how signals flow between them. The choice of topology can significantly impact the performance, efficiency, and functionality of the electronic system. Common topologies include series, parallel, star, mesh, and hybrid configurations, each with its own advantages and limitations. Designers carefully select the appropriate topology based on the specific requirements of the circuit to achieve the desired performance and functionality.
Buck - Control Mode
In electronic components, "Control Mode" refers to the method or mode of operation used to regulate or control the behavior of the component. This parameter determines how the component responds to input signals or commands to achieve the desired output. The control mode can vary depending on the specific component and its intended function, such as voltage regulation, current limiting, or frequency modulation. Understanding the control mode of an electronic component is crucial for proper integration and operation within a circuit or system.
CURRENT-MODE - Frequency - Switching
"Frequency - Switching" in electronic components refers to the rate at which a device, such as a transistor or switching regulator, turns on and off during operation. This parameter is crucial in determining the efficiency and performance of power converters, oscillators, and other circuits that rely on rapid switching. Higher switching frequencies typically allow for smaller component sizes but may require more advanced design considerations to manage heat and electromagnetic interference.
1.5MHz - Synchronous Rectifier
Synchronous rectification is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches, usually power MOSFETs or power bipolar junction transistors (BJT).
No - Min Output Voltage
Min Output Voltage refers to the lowest voltage level that an electronic component, such as a voltage regulator or power supply, can provide reliably under specified conditions. It indicates the minimum threshold required for proper operation of connected devices. Operating below this voltage may lead to device malfunction or failure to operate as intended.
800mV - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
AOZ1280CI Block Diagram
The following is the AOZ1280CI Block Diagram.

AOZ1280CI Block Diagram
AOZ1280CI Features
3 V to 26 V operating input voltage range
240 mΩ internal NMOS
High efficiency: up to 95 %
Internal compensation
1.2 A continuous output current
Fixed 1.5 MHz PWM operation
Internal soft-start
Output voltage adjustable down to 0.8 V
Cycle-by-cycle current limit
Short-circuit protection
Thermal shutdown
Small size SOT23 -6L
AOZ1280CI Applications
Networking
Set-top boxes
DVD drives and HDD
LCD Monitors & TVs
Cable modems
Point of load DC/DC conversion
Telecom/Networking/Datacom equipment
AOZ1280CI Alternatives
AOZ18101DI Series:
The AOZ18101DI series, the first eFuse device for sub-power rails in server applications, is a current-limiting over-voltage protection Efuse targeting applications that require front-end protection at the input line, according to Alpha and Omega Semiconductor Limited. AOS' superior co-packaging technology, a high-performance IC with protection features, and a high SOA Trench MOSFET are used in these new devices. These devices are appropriate for servers, HDD and SSD drivers, PCI cards, and networking and come in a small 3mm by 3mm DFN packaging.
AOZ1280CI Typical Application Circuit
The following is AOZ1280CI Typical Application Circuit.

AOZ1280CI Typical Application Circuit
Environmental & Export Classifications
| Attribute | Description |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
AOZ1280CI Package Outline

AOZ1280CI Package Outline
AOZ1280CI Manufacturer
Alpha and Omega Semiconductor, Inc., or AOS, is a designer, developer, and global supplier of a broad range of power semiconductors, including a wide portfolio of Power MOSFET and Power IC products. AOS seeks to differentiate itself by integrating its expertise in device physics, process technology, design, and advanced packaging to optimize product performance and cost, and its product portfolio is designed to meet the ever-increasing power efficiency requirements in high volume applications, including portable computers, flat-panel TVs, battery packs, portable media players and power supplies.
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsNumber of OutputsFrequency - SwitchingVoltage - Input (Min)Min Output VoltageMax Output VoltageEfficiencyView Compare
AOZ1280CI
SOT-23-6
2
1
1.5MHz
3V
800 mV
26 V
95 %
SC-74A, SOT-753
5
1
20kHz
-
-1.6 V
-5.25 V
-
SOT-23-6
6
1
80kHz
2.5V
-
-
-
SOT-23-6
6
1
1MHz
-
2.82 V
3.18 V
-
SC-74A, SOT-753
5
1
1MHz
2.5V
1.8 V
-
94 %
Trend Analysis
How does AOZ1280CI work?
The AOZ1280CI operates from a 3 V to 26 V input voltage range and provides up to 1.2 A of continuous output current. The output voltage is adjustable down to 0.8 V. The fixed 1.5 MHz PWM switching frequency reduces inductor size.
How much continuous output current does the AOZ1280CI provide?
1.2 A
What is the temperature range of the AOZ1280?
-40 to +85 degrees Celsius
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Alpha & Omega Semiconductor Inc.
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