FAN2502S28X

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The FAN2502S28X is a fixed-output 2.8V CMOS LDO regulator from the FAN2502/03 family, housed in a SOT-23-5 package. It delivers up to 150mA output current with a maximum dropout voltage of 180mV at full load. The device features ultra-low power consumption, drawing only 25µA ground current during operation and less than 1µA in shutdown mode via the Enable pin. Pin 4 serves as a Bypass input for noise reduction. It includes thermal limiting protection that disables the output if the junction temperature exceeds 150°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Utilizes CMOS technology for extremely low quiescent current and high efficiency in battery-powered applications.
• Features an Enable/Shutdown control pin that reduces supply current to less than 1µA when deactivated.
• Incorporates onboard thermal limiting circuitry to protect against overload conditions by suspending output until cooling occurs.
• Provides a dedicated Bypass pin (Pin 4) allowing connection of external capacitors to optimize noise performance.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Cellular phones and accessories
• Portable cameras and video recorders
• Laptop, notebook, and palmtop computers

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix '28X' confirms the 2.8V fixed output voltage and tape-and-reel packaging configuration. Ensure compatibility with the SOT-23-5 footprint and confirm that the Bypass pin function meets the design requirements for noise-sensitive circuits. Check datasheet revisions for any updates to absolute maximum ratings or thermal characteristics before finalizing procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a stable 2.8V rail is required with minimal space constraints due to the compact SOT-23-5 package. It is suitable for designs prioritizing low standby power consumption through the shutdown feature. Consider the thermal resistance characteristics of the PCB layout, as the device relies on copper area for heat dissipation to maintain operation within the specified junction temperature limits under heavy loads.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the FAN2502/03 family of micropower low-dropout regulators designed for portable electronics. The FAN2502 variant specifically offers adjustable or bypass configurations at Pin 4, distinguishing it from the FAN2503 which provides an error flag. These regulators utilize CMOS processes to achieve superior performance compared to older BiCMOS designs, offering improved loop stability across various capacitor types.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The FAN2502/03 family is noted to be pin-compatible with many popular legacy devices. Verify electrical parameters such as dropout voltage and ground current against existing components to ensure functional equivalence without requiring schematic modifications.