FAN2558S38X

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

The FAN2558S38X is a fixed-output low dropout linear regulator manufactured by onsemi, formerly Fairchild Semiconductor. It provides a fixed 3.8V output with a maximum load current of 180mA. The device operates within an input voltage range of 2.7V to 5.5V and features a typical dropout voltage of 400mV at full load. It incorporates thermal shutdown and short-circuit protection mechanisms. The component is housed in a SOT-23-5 surface-mount package and supports an operating temperature range from -40°C to +125°C.

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

• Integrates power good indicator with open drain output for system status monitoring
• Includes fast enable functionality compatible with TTL-level inputs for CDMA applications
• Provides ultra-low noise operation capability through external bypass capacitor connection

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

• Processor power-up sequencing circuits
• Portable electronic equipment power management
• PCMCIA Vcc and Vpp regulation and switching

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

Verify the specific suffix designation carefully as part numbers may have evolved following the integration of Fairchild Semiconductor into onsemi. Confirm RoHS compliance status and check for end-of-life notifications or production discontinuation notices prior to finalizing procurement plans.

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

Select this component when a stable 3.8V rail is required for portable devices. Ensure the application utilizes a minimum 1µF output capacitor with appropriate ESR characteristics to maintain stability. Verify that the input voltage remains within the specified operational limits to prevent regulation failure.

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

This device belongs to the FAN2558/9 family of low voltage CMOS LDOs. The family offers various fixed output voltages and adjustable options. It shares common features such as 180mA output current capability and compact packaging options including SOT-23-5 and MLP-6 variants across the series.

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

Check for updated part numbers under the onsemi portfolio due to corporate integration. Verify pinout compatibility and electrical specifications against alternative LDO regulators offering similar 3.8V fixed output and 180mA current capacity.