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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 16QFN
- Series：-
- Mfr：Allegro MicroSystems
- 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)：9V
- Voltage - Input (Max)：46V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：46V
- Current - Output：3A
- Frequency - Switching：450kHz ~ 2MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-WQFN Exposed Pad
- Supplier Device Package：16-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The A4403GEUTR-T is a synchronous buck switching regulator IC manufactured by Allegro MicroSystems. It provides an adjustable positive output voltage ranging from 0.8V to 46V with a maximum continuous output current of 3A. The device operates with an input voltage range of 9V to 46V and supports a switching frequency between 450kHz and 2MHz. It is housed in a 16-WQFN package with an exposed pad, designed for surface mount installation. The component functions within a junction temperature range of -40°C to 105°C.
Feature Summary
- Integrates high-side and low-side power switches for efficient step-down conversion without requiring external Schottky diodes.
- Features fixed-frequency pulse-width modulation (PWM) control architecture for stable regulation under varying load conditions.
- Includes comprehensive protection mechanisms such as overcurrent protection, thermal shutdown, and undervoltage lockout.
Applications
- Point-of-load regulation for industrial equipment
- Power supply stages for embedded computing systems
- Voltage conversion for automotive electronics
Procurement Notes
Verify the specific suffix GEUTR-T against the manufacturer's official datasheet to confirm pinout compatibility and packaging specifications. Ensure that the ordering documentation explicitly references the 16-WQFN package type. Cross-reference the part number with the latest Allegro MicroSystems product change notices to account for any assembly or material updates.
Selection Notes
Select this component when a single-output, non-synchronous buck converter solution is required for applications demanding up to 3A load current. It is suitable for designs where input voltages remain within the 9V to 46V window. Consider the thermal performance of the 16-WQFN package relative to the expected ambient temperature and PCB copper area for adequate heat dissipation.
Part Context
This part belongs to the A4403 series of DC-DC converters from Allegro MicroSystems. It is distinct from linear regulators and other switching topologies like boost or buck-boost converters. The series is characterized by its integrated power stage design, which simplifies bill of materials and reduces the footprint compared to discrete solutions using external MOSFETs.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source data. Consult Allegro MicroSystems technical support for direct replacements or evaluate alternative PMIC families based on electrical parameter matching.
