FAN2505S28X

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

The FAN2505S28X is a fixed-output 2.8V linear regulator from the FAN2504/05 family, manufactured by onsemi (formerly Fairchild). It utilizes CMOS technology to deliver a maximum output current of 200 mA with an input voltage range of 2.7 V to 6.5 V. The device features a dropout voltage of 200 mV at full load and a ground pin current of 75 µA. It includes an Enable pin for shutdown control and an ERR open-drain flag that indicates when the output drops below 95% of nominal. The component operates within a junction temperature range of -40°C to +125°C and is housed in a compact SOT-23-5 surface-mount package.

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

• CMOS-based micropower design optimized for low power consumption and extended battery life in portable devices
• Integrated thermal limiting protection that automatically disables the output during overload or overheating conditions
• Open-drain Error Flag output provides diagnostic indication of fault conditions such as input dropout or excessive load
• High loop stability allowing compatibility with a wide variety of external capacitors without strict ESR requirements

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 ordering suffix '28X' confirms the 2.8V fixed output voltage and tape-and-reel packaging format. Confirm the manufacturer origin, as this part was originally produced by Fairchild Semiconductor before integration into onsemi. Ensure the procurement source provides valid datasheets reflecting the correct revision history and electrical characteristics for quality assurance.

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

Select this component when a fixed 2.8V supply is required for sensitive portable electronics. The FAN2505 variant is specifically chosen over the FAN2504 series due to its integrated Error Flag output, which allows system monitoring of voltage faults. Consider the SOT-23-5 package size constraints and verify that the application benefits from the low quiescent current and high PSRR provided by the CMOS architecture.

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

This device belongs to the FAN2504/FAN2505 family of 200 mA CMOS LDO regulators. While the FAN2504 offers adjustable voltage or bypass options, the FAN2505 is distinguished by its dedicated Error Flag pin. This family replaces older BiCMOS designs, offering improved performance and pin compatibility with popular legacy regulators while maintaining a compact footprint suitable for space-constrained mobile applications.

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

FAN2505S28