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AOZ1021AI#A
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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 8SOIC
- Series：EZBuck™
- Mfr：Alpha & Omega Semiconductor Inc.
- Package：Tape & Reel (TR)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：4.5V
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：16V
- Current - Output：3A
- Frequency - Switching：500kHz
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The AOZ1021AI is a synchronous high-efficiency buck regulator from the EZBuck series by Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5V to 16V and delivers up to 3A of continuous output current. The output voltage is adjustable down to 0.8V with an initial accuracy of 1.5%. The device features a fixed 500kHz PWM switching frequency and integrates internal switches with 100mΩ high-side and 20mΩ low-side resistance. It is housed in an 8-SOIC package and rated for ambient temperatures between -40°C and +85°C.
Feature Summary
- Synchronous rectification architecture with integrated high-side and low-side power switches
- Fixed 500kHz PWM operation for consistent timing and filter component sizing
- Integrated protection mechanisms including cycle-by-cycle current limit, thermal shutdown, and short-circuit protection
- Pre-bias start-up capability allowing safe initialization in systems with pre-charged outputs
Applications
- Point-of-load DC/DC conversion
- PCIe graphics cards
- Set-top boxes
- LCD panels
- Telecom and networking equipment
Procurement Notes
Verify the specific suffix 'AI' against the manufacturer's official datasheet to confirm pinout, temperature grade, and packaging details. Confirm RoHS compliance status as per the latest documentation. Ensure the source document explicitly lists AOZ1021AI as the active part number, noting that some distributors may list it as obsolete or end-of-life depending on regional inventory updates.
Selection Notes
Select this component when a compact, high-efficiency solution is required for converting 4.5V to 16V inputs to lower voltages up to 3A. The fixed 500kHz frequency simplifies external inductor and capacitor selection compared to adjustable frequency regulators. Consider the SO-8 package size constraints and the -40°C to +85°C operating range suitability for the target environment.
Part Context
The AOZ1021AI belongs to the EZBuck family of synchronous buck regulators designed for simplicity and high efficiency. This series targets applications requiring minimal external components while maintaining robust performance. The AI suffix typically denotes specific manufacturing lot or temperature grading variations within the standard AOZ1021 product line.
Replacement Considerations
Publicly documented substitutes include the AOZ1022DI-01 and AOZ1022PI, which share the same EZBuck 3A synchronous buck regulator functionality and feature set.
