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AOZ1033AI#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)：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#A is a high-efficiency, easy-to-use 3A synchronous buck regulator from the EZBuck series by Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5V to 18V and provides up to 3A of continuous output current with an adjustable output voltage down to 0.8V. The device features fixed 600kHz PWM operation, internal soft start, and cycle-by-cycle current limit protection. Packaged in an SO-8 format, it is rated for an ambient temperature range of -40°C to +85°C.
Feature Summary
- Synchronous buck topology with integrated high-side and low-side switches
- Fixed 600kHz PWM switching frequency with pulse skipping at light loads
- Built-in protection mechanisms including thermal shutdown and short-circuit protection
Applications
- Point-of-load DC/DC converters
- LCD TV power supplies
- Set-top boxes and DVD/Blu-ray players
- Telecom and networking datacom equipment
Procurement Notes
Verify the specific suffix #A against official datasheets to confirm pinout and electrical characteristics match design requirements. Confirm package dimensions for SO-8 compatibility during PCB layout. Check manufacturer notices for any product change notifications or end-of-life declarations prior to finalizing procurement plans.
Selection Notes
Select this component for applications requiring a compact, high-efficiency step-down solution with fixed frequency operation. Ensure the input voltage stays within the 4.5V to 18V range and that the load does not exceed the 3A continuous current rating. Consider the SO-8 package size constraints and thermal management needs for the operating environment.
Part Context
The AOZ1033AI belongs to the EZBuck family of synchronous buck regulators designed for simplicity and efficiency. It shares architectural similarities with other members like the AOZ1031 and AOZ1034 but is distinguished by its specific 3A current capability and 600kHz switching frequency. This places it in a niche for medium-power point-of-load conversion tasks.
Replacement Considerations
Direct substitutes include the AOZ1031AI for lower current applications or the AOZ1034 for higher current needs. Verify pin compatibility and electrical parameters before swapping. Generic replacements may require circuit redesign due to differences in switching frequency or control loop characteristics.
