FAN2534SX

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

The FAN2534SX is a 150 mA CMOS low-dropout (LDO) voltage regulator featuring fast start-up and enable control. It utilizes an SOT-23-5 surface-mount package. Pin 4 serves as the ADJ terminal, allowing users to adjust the output voltage over a wide range using an external voltage divider. The device offers 70 dB ripple rejection, with performance exceeding 45 dB up to 1 MHz. Power-on and enable times are both specified at 150 µsec. Noise performance is optimized for CDMA time slices, achieving 50 µVrms. Dropout voltage is 180 mV at full load. Internal protections include thermal limiting and a 300 mA trimmed current limit.

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

• Adjustable output voltage via external divider on pin 4
• Ultra-fast power-on and enable response times
• Low noise profile suitable for sensitive RF applications
• High ripple rejection ratio across frequency spectrum

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

• CDMA cellular handsets
• Portable digital devices requiring stable power rails
• Battery-powered equipment with strict size constraints

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

Verify component authenticity through authorized Fairchild or onsemi distribution channels. Confirm datasheet revisions match design requirements. Ensure ESD handling protocols are followed during assembly. Validate that the SOT-23-5 footprint aligns with PCB layout specifications. Check for specific suffix variations if fixed voltage options are required instead of adjustable configurations.

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

Select this component when adjustable output voltage is necessary within a compact form factor. The SOT-23-5 package suits space-constrained portable designs. Verify input voltage ranges accommodate system battery profiles. Consider the 150 mA current capability against peak load demands. Evaluate the need for fast enable times in power management sequences compared to standard LDO alternatives.

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

This part belongs to the FAN2534/FAN2535 family of micropower LDO regulators designed for mobile communications. Unlike fixed-voltage variants, the SX suffix indicates the adjustable version utilizing pin 4 for feedback. The family replaces older bipolar designs, offering improved loop stability and lower dropout characteristics while maintaining compatibility with popular industry footprints.

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

Pin-compatible replacements exist within the broader LDO market, but verify electrical parameters such as ripple rejection and noise levels. Ensure substitute components support the same SOT-23-5 package and adjustable feedback configuration. Cross-reference thermal limits and current ratings to maintain system reliability.