LP2978IM5X-3.8

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

The LP2978IM5X-3.8 is a fixed positive linear voltage regulator manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 3.8V with a maximum output current of 50mA. The device features a typical dropout voltage of 0.225V at full load and operates within an input voltage range up to 16V. It is housed in a compact SOT-23-5 surface-mount package. The regulator includes internal protection mechanisms such as overcurrent limiting and thermal shutdown to ensure reliable operation under fault conditions.

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

• Fixed 3.8V output voltage for stable power supply applications
• Ultra-low dropout characteristic ensuring efficient regulation
• Integrated overcurrent and thermal protection circuits
• Compact SOT-23-5 package suitable for space-constrained designs

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

• Battery-powered portable electronic devices
• Embedded systems requiring stable low-voltage rails
• Microcontroller power supply conditioning
• Sensor interface circuitry requiring precise voltage levels

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

Verify the manufacturer source carefully, as this specific suffix (IM5X) may indicate a Rochester Electronics or distributor-specific variant rather than direct Texas Instruments production. Confirm RoHS compliance status and lead-free markings on the physical component. Ensure the SOT-23-5 pinout matches your PCB footprint design. Check for any obsolescence notices from the original manufacturer regarding this specific lot code.

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

Select this component when a fixed 3.8V rail is required with moderate current demands up to 50mA. It is suitable for applications where input voltage varies but remains above the minimum dropout threshold. Consider the thermal performance in enclosed spaces due to the small package size. Compare against other LDOs if lower quiescent current or higher output current is needed for the specific system requirements.

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

This part belongs to the LP2978 series of micropower ultra-low-dropout regulators. The series is designed for battery-operated applications requiring long battery life and stable output voltages. The IM5X designation typically refers to the SOT-23-5 package variant with specific tape-and-reel packaging configurations used in high-volume manufacturing environments.

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

LP2978IM5-3.8/NOPB is a documented equivalent part number offering similar electrical characteristics and pinout compatibility. Verify package dimensions and marking codes before substitution. Other parts in the LP2978 family with different output voltages may be compatible if voltage adjustment is acceptable.