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AOZ2151LQI-30
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Product Detailed Parameters
- Description：IC REG BUCK ADJ 4A 18QFN
- Series：EZBuck™
- Mfr：Alpha & Omega Semiconductor Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Output Type：Adjustable
- Number of Outputs：1
- Voltage - Input (Min)：6.5V
- Voltage - Input (Max)：28V
- Voltage - Output (Min/Fixed)：0.6V
- Voltage - Output (Max)：28V
- Current - Output：4A
- Frequency - Switching：-
- Synchronous Rectifier：Yes
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：18-PowerWFQFN
- Supplier Device Package：18-QFN (3x3)
- Grade：-
- Qualification：-
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Overview
The AOZ2151LQI-30 is a synchronous step-down DC-DC converter from the EZBuck series by Alpha & Omega Semiconductor. It integrates high-side and low-side N-channel MOSFETs to deliver up to 4A of output current. The device operates with an input voltage range of 4.5V to 28V and supports adjustable output voltages from 0.8V to 23.8V. It features a fixed switching frequency of 500kHz, selectable via an external resistor. The component includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, and undervoltage lockout.
Feature Summary
- Integrates synchronous rectification for improved efficiency
- Supports analog dimming control for backlight applications
- Includes internal soft-start functionality
Applications
- LCD panel backlight drivers
- Portable electronics power regulation
- General-purpose point-of-load conversion
Procurement Notes
Verify the specific suffix 'LQI-30' against the manufacturer's latest datasheet to confirm pinout compatibility and package dimensions. Confirm RoHS compliance status and check for any product change notices (PCN) related to manufacturing site or material composition updates before finalizing procurement plans.
Selection Notes
Select this regulator when a compact solution is required for driving LED backlights or powering logic circuits from a 24V bus. The integrated inductor option reduces board space compared to discrete designs. Ensure the thermal pad connection is properly managed on the PCB to handle heat dissipation at full load currents within the specified ambient temperature range.
Part Context
This part belongs to the EZBuck family of synchronous buck regulators designed for cost-sensitive and space-constrained applications. It replaces older generations of non-synchronous converters by offering higher efficiency through integrated MOSFETs. The LQI variant typically denotes a specific lead-free and halogen-free compliant package suitable for modern assembly processes.
Replacement Considerations
Direct replacements include AOZ2151EQI-30 and AOZ2151LQI-31. Verify that substitute parts maintain identical pin configurations and electrical characteristics, particularly regarding the switching frequency setting and output voltage adjustment range.
