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Product attributes Property Value
Manufacturer Alpha & Omega Semiconductor Inc.
Product Series EZBuck™
Packaging 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)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 8-SMD, Flat Leads Exposed Pad
Supplier Device Package 8-DFN-EP (3x3)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The AOZ6643DI from Alpha & Omega Semiconductor is a synchronous Buck DC-DC converter delivering up to 3A. It operates from an input voltage of 4.5V to 18V and provides an adjustable output from 0.8V to 15.3V. The fixed 500kHz switching frequency balances efficiency and component size. Its 8-SMD flat leads exposed pad package is ideal for compact, high-density designs in consumer, industrial, and computing applications.

  • Fixed 500kHz Frequency: Simplifies EMI filtering and allows smaller inductor selection.
  • Wide Output Range: 0.8V to 15.3V supports various logic and I/O voltages.
  • High Efficiency: Synchronous rectification minimizes power loss for thermal management.
  • Compact Package: 8-SMD flat leads reduce footprint for space-constrained boards.

Point-of-Load Converters

The 4.5V to 18V input range and 3A output make it ideal for POL conversion in networking and computing equipment.

Set-Top Boxes and Gaming Consoles

High efficiency at 500kHz reduces heat, making it suitable for consumer electronics with limited airflow.

Industrial Control Systems

Its robust design and adjustable output down to 0.8V support logic and I/O rail generation in PLCs.

Storage Drives

Provides clean, stable power for SSD and HDD controllers, ensuring reliable data operation.

FPGA and DSP Power

Adjustable output voltage allows powering core and I/O rails of FPGAs and DSPs from a single converter.

Portable Instruments

Compact 8-SMD package and high efficiency extend battery life in handheld measurement tools.

Q: What type of converter is the AOZ6643DI?
A: It is a synchronous Buck (step-down) DC-DC converter.
Q: What is the input voltage range?
A: The input voltage range is 4.5V to 18V.
Q: What is the maximum output current?
A: The maximum output current is 3A.
Q: What is the switching frequency?
A: The switching frequency is fixed at 500kHz.
Q: What package is available?
A: It comes in an 8-SMD, Flat Leads Exposed Pad package.
Q: What is the output voltage range?
A: The output voltage is adjustable from 0.8V to 15.3V.
Base Product Number : AOZ6643
3A 4.5V-18V 500kHz 8-SMD Buck DC-DC Converter Industrial Point-of-Load
Q: What type of converter is the AOZ6643DI?
A: It is a synchronous Buck (step-down) DC-DC converter.
Q: What is the input voltage range?
A: The input voltage range is 4.5V to 18V.
Q: What is the maximum output current?
A: The maximum output current is 3A.
Q: What is the switching frequency?
A: The switching frequency is fixed at 500kHz.
Q: What package is available?
A: It comes in an 8-SMD, Flat Leads Exposed Pad package.
Q: What is the output voltage range?
A: The output voltage is adjustable from 0.8V to 15.3V.