FAN2519S30X

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

The FAN2519S30X is a micropower low-dropout voltage regulator from the FAN2518/19 family, manufactured by onsemi. It provides a fixed 3V output with a maximum continuous current of 50mA. The device features an enable/shutdown control pin and an error flag output at Pin 4 to indicate when the output voltage drops below 95% of nominal due to faults such as input dropout or thermal overload. Key electrical parameters include a maximum dropout voltage of 75mV at 50mA, a ground current of 50µA at 50mA load, and a shutdown current of less than 1µA. It operates within an input voltage range of 2.7V to 6.5V and supports junction temperatures up to 125°C.

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

• Integrated error flag output indicates fault conditions where output voltage falls below specified minimums.
• Ultra-low power consumption with optimized ground current for battery-powered applications.
• Fast power-cycle time allows re-enablement within 500 microseconds.
• Thermal protection shuts down output if die temperature exceeds limits.

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

• CDMA cellular handsets
• Portable computers
• PDAs

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

Verify component authenticity through authorized distributors. Confirm package integrity upon receipt. Check datasheet revisions for updates. Ensure ESD precautions during handling. Validate pin alignment against SOT-23-5 specifications.

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

Select this part for designs requiring a fixed 3V rail with minimal quiescent current. The error flag aids in system diagnostics. Verify input voltage stays above dropout requirements. Consider thermal resistance of PCB layout for heat dissipation.

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

Part of the FAN2518/19 CMOS LDO family. Distinguished from FAN2518 by Pin 4 function (Error vs. Adj/Bypass). Uses SOT-23-5 surface-mount package. Compatible with various ceramic and tantalum output capacitors.

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

Microchip Technology MIC5256-3.0YM5-TR is listed as a similar substitute.

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

What is the function of Pin 4 on the FAN2519S30X?

Pin 4 serves as an open-drain Error Flag output that goes LOW when the output voltage drops below 95% of nominal due to faults like overheating or input dropout.

How does the Enable pin affect power consumption?

Applying a logic low (≤0.4V) to the Enable pin shuts down the regulator, reducing supply current to less than 1µA.