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Product Detailed Parameters
- Description：IC REG BUCK ADJ 3A 24QFN
- 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)：4V
- Voltage - Input (Max)：35V
- Voltage - Output (Min/Fixed)：0.8V
- Voltage - Output (Max)：28V
- Current - Output：3A
- Frequency - Switching：250kHz ~ 2.4MHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 150°C (TA)
- Mounting Type：Surface Mount
- Package / Case：24-WFQFN Exposed Pad
- Supplier Device Package：24-QFN (4x4)
- Grade：-
- Qualification：-
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Overview
The ARG81801KESJSR is a synchronous buck switching regulator IC manufactured by Allegro MicroSystems. It features an adjustable output voltage range from 0.8V to 28V with a maximum continuous output current of 3A. The device operates with an input voltage supply between 4V and 35V. Its programmable switching frequency spans from 250kHz to 2.4MHz. The component is housed in a 24-WFQFN package with an exposed pad, designed for surface mount installation. It supports positive output configuration and includes integrated protection circuits.
Feature Summary
- Synchronous buck topology providing efficient step-down conversion
- Adjustable output voltage capability within specified limits
- Programmable switching frequency for optimization of efficiency and EMI
- Integrated thermal and electrical protection mechanisms
Applications
- Point-of-load regulation in industrial systems
- Power supply stages for embedded computing platforms
- Battery-powered equipment requiring efficient voltage conversion
Procurement Notes
Verify the obsolete status and End-of-Life (EOL) declaration dated February 22, 2024, before procurement planning. Confirm availability of qualified replacement components such as the A8586KEJTR-T. Ensure design reviews account for the discontinuation timeline to prevent supply chain disruptions. Validate that alternative parts meet all original electrical and mechanical specifications.
Selection Notes
Select this component only if the 3A output current and 35V input range align with system requirements. Consider the 24-pin QFN package constraints for PCB layout and thermal management. Evaluate the need for external compensation components due to the adjustable nature of the regulator. Assess the impact of the discontinued status on long-term product viability and maintenance.
Part Context
This part belongs to the ARG818 series of wide-input synchronous buck regulators from Allegro MicroSystems. It shares architectural similarities with other members like the ARG81800 but offers higher current capacity. The series targets automotive and industrial applications requiring robust power management solutions with flexible configuration options for various voltage rails.
Replacement Considerations
The A8586KEJTR-T is identified as a manufacturer-recommended substitute. Verify pinout compatibility and electrical parameter alignment before integration. Review datasheet differences regarding thermal performance and control interfaces.
