LM3490IM5X-5.0/NOPB

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

The LM3490IM5X-5.0/NOPB is a quasi low-dropout linear voltage regulator manufactured by Texas Instruments, providing a fixed 5.0V output with a maximum load current of 100 mA. It operates from an input voltage up to 30V and features a logic-controlled ON/OFF pin for power management. The device maintains a specified maximum dropout voltage of 1.2V across full load and temperature ranges (-40°C to +125°C). Packaged in a 5-lead SOT-23 (DBV) format, it offers ±5% output voltage tolerance and includes thermal limiting protection.

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

• Logic-controlled ON/OFF functionality enables precise subsystem power control
• Quasi low-dropout design allows operation with minimal input-to-output voltage difference
• Compact 5-lead SOT-23 package provides a small footprint alternative to standard regulators

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

• Tiny 5V±5% to 3.3V, 100 mA converter
• Post regulator for switching DC/DC converters
• Bias supply for analog circuits

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

Verify the LIFEBUY status on official Texas Instruments channels before finalizing procurement plans. Confirm that the specific ordering suffix matches the required packaging quantity and environmental compliance specifications. Ensure compatibility with existing PCB footprints and soldering profiles during integration.

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

Select this component when a compact linear regulator is needed for 5V applications requiring logic-controlled shutdown. It serves as a direct replacement for larger packages like TO-92 or DIP variants of the LM78LXX series where space is constrained. Verify that the input voltage remains within the 30V limit and that heat dissipation requirements are met within the SOT-23 package constraints.

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

The LM3490 series consists of 100mA quasi low-dropout linear voltage regulators available in 3.3V, 5V, 12V, and 15V versions. Designed for battery-powered and portable applications, these devices offer high performance in a tiny SOT-23 package. The series is intended to replace industry-standard regulators while providing improved dropout characteristics and additional logic control features.

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

Official substitutes include other members of the LM3490 family such as LM3490IM5-3.3/NOPB, LM3490IM5-12/NOPB, and LM3490IM5-15/NOPB. These parts share identical pinouts and packaging but provide different fixed output voltages.