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AOZ1033AI
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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)：18V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：18V
- Current - Output：3A
- Frequency - Switching：450kHz
- 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 AOZ1033AI is a synchronous buck regulator from the EZBuck series by Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5V to 18V and delivers up to 3A of continuous output current. The output voltage is adjustable down to 0.8V. Key electrical parameters include a fixed switching frequency of 600kHz, internal high-side switch resistance of 80mΩ, and low-side switch resistance of 30mΩ with an integrated Schottky diode. The device achieves efficiencies up to 95% and features pulse skipping at light loads. It is housed in an SO-8 package and rated for ambient temperatures between -40°C and +85°C.
Feature Summary
- Synchronous buck topology with integrated high-side and low-side switches
- High efficiency performance up to 95% across load ranges
- Internal soft start and pre-bias start-up capability
- Comprehensive protection including thermal shutdown and short-circuit protection
Applications
- Point of load DC/DC converters
- LCD TV set top boxes
- DVD/Blu-ray players/recorders
- Cable modems
- PCIe graphics cards
Procurement Notes
Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm package integrity and pin alignment upon receipt. Check datasheet revisions for any parameter updates or application note changes prior to final design integration. Ensure compliance with RoHS directives if required by specific regional regulations.
Selection Notes
Select this regulator for applications requiring a compact solution with high efficiency and adjustable output voltages. Consider the 600kHz switching frequency for balancing component size and EMI. Evaluate thermal management requirements given the 3A output capability in an SO-8 package. Compare against other EZBuck family members like the AOZ1031 or AOZ1034 if different current ratings or packages are needed.
Part Context
The AOZ1033AI belongs to the EZBuck family of synchronous buck regulators designed for easy implementation and high performance. This series targets portable and consumer electronics where space and efficiency are critical. The AOZ1033 variant specifically provides 3A output, distinguishing it from lower or higher current counterparts within the same product line.
Replacement Considerations
Check for direct substitutes such as the AOZ1031AI which shares similar specifications but may differ in switching frequency. Verify pin compatibility and thermal characteristics when considering alternative packages or manufacturers.
