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AOZ1051PI-2
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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 8SO
- 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)：15.3V
- 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) Exposed Pad
- Supplier Device Package：8-SO-EP
- Grade：-
- Qualification：-
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Overview
The AOZ1051PI-2 is a high-efficiency, easy-to-use 3 A synchronous buck regulator from Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5 V to 18 V and provides up to 3 A of continuous output current with an adjustable output voltage down to 0.8 V. The device features internal switches with on-resistances of 70 mΩ for the high-side and 40 mΩ for the low-side at 12 V. It supports 500 kHz PWM operation and includes protection mechanisms such as cycle-by-cycle current limit, pre-bias start-up, short-circuit protection, and thermal shutdown.
Feature Summary
- Synchronous buck topology with integrated high-side and low-side power switches
- Adjustable output voltage capability starting from 0.8 V
- Integrated protection against over-current, short circuits, and thermal overload
- Supports external soft-start control for inrush current management
Applications
- Point-of-load DC/DC converters
- LCD TV power supplies
- Set-top boxes
- DVD and Blu-ray players/recorders
- Cable modems
Procurement Notes
Verify the specific suffix designation to ensure correct output voltage configuration or pinout compatibility before procurement. Confirm package type availability matches design requirements. Check manufacturer documentation for latest revision status and RoHS compliance details. Ensure ordering quantities align with standard packaging formats provided by the supplier.
Selection Notes
Select this component for applications requiring a compact, efficient 3 A step-down solution. Consider the 500 kHz switching frequency for balancing component size and efficiency. Evaluate thermal performance based on expected load currents and ambient conditions. Verify that the required output voltage falls within the adjustable range supported by the feedback network.
Part Context
This part belongs to the EZBuck family of synchronous buck regulators designed for simplicity and high efficiency. It integrates power switches and control logic into a single package to reduce external component count. The series targets portable and consumer electronics where space and power efficiency are critical constraints.
Replacement Considerations
Check datasheets for compatible parts like AOZ1038 for higher current needs. Verify pinout compatibility if substituting directly. Compare switching frequencies and output current ratings to ensure system stability.
