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FAN1581T is listed in the Voltage Regulators - Linear, Low Drop Out (LDO) Regulators range at ChipApex. The manufacturer field lists onsemi. Its product description is IC REG LINEAR POS ADJ 5A TO220-5. Review the specifications below when checking this part for your BOM.
The FAN1581T is a linear voltage regulator IC from onsemi, part of the FAN1581 family. It provides a positive fixed output voltage of 2.5V with a maximum continuous output current of 5A. The device utilizes a TO-252-5 (DPAK) surface-mount package. Key electrical parameters include a maximum input voltage of 7V and a typical dropout voltage of 0.4V at full load. Quiescent current is specified at 6 mA, and power supply rejection ratio (PSRR) reaches 80 dB at 120 Hz. Operating temperature range extends from 0°C to 125°C.
Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm package integrity and pin alignment against the TO-252-5 specification sheet prior to integration. Ensure storage conditions comply with moisture sensitivity level 1 requirements to prevent soldering defects during assembly processes.
Select this component when a fixed 2.5V output is required with high current capacity in a compact surface-mount form factor. Consider the TO-252-5 package for thermal management needs compared to smaller alternatives. Evaluate input voltage stability to ensure it remains within the 7V maximum limit while maintaining sufficient headroom for the specified dropout characteristics.
This device belongs to the FAN1581 series of ultra-low dropout regulators designed by onsemi. The series includes adjustable variants and other fixed voltage options such as 1.2V and 1.5V versions. These components are engineered for high-efficiency power delivery in digital logic and processor environments where minimal voltage drop is critical for system performance.
Public confirmed substitute part numbers: FAN1581D25X, FAN1581MX.
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