LP2954ISX/NOPB

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

The LP2954ISX/NOPB is a fixed positive linear low-dropout voltage regulator manufactured by Texas Instruments. It provides a stable 5V output with a maximum continuous current of 250mA. The device operates within an input voltage range up to 30V and maintains performance across an extended temperature range from -40°C to +125°C. Key electrical characteristics include a typical dropout voltage of 0.8V at full load, a quiescent current of 200µA, and integrated protection features such as overcurrent limiting, thermal shutdown, and reverse polarity blocking. It is housed in a surface-mount TO-263 (DDPAK-5) package.

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

• Integrated overcurrent limiting and thermal shutdown for robust operation under fault conditions
• Reverse polarity protection capability allows safe connection even if input and ground are swapped
• Fixed 5V output eliminates the need for external feedback resistors
• Low quiescent current design supports battery-powered applications

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

• Portable equipment requiring efficient power regulation
• Battery-operated systems needing low standby current consumption
• General-purpose power supplies in industrial control modules
• Communication equipment requiring stable 5V logic rails

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

Verify the specific suffix 'ISX' corresponds to the intended temperature grade and packaging format. Confirm that the TO-263 footprint matches the target PCB layout. Ensure the fixed 5V output aligns with system requirements, as adjustable variants exist within the same family. Check RoHS compliance status for environmental regulations.

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

Select this component when a fixed 5V rail is required with moderate current capacity. Consider the TO-263 package for its thermal dissipation capabilities compared to smaller SOT packages. Evaluate the 30V input limit against the maximum source voltage. Compare quiescent current specifications against other LDOs if battery life is critical.

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

This part belongs to the LP2954 series of micropower low-dropout regulators. The series includes both adjustable and fixed output versions. The 'ISX' designation indicates the industrial temperature range and reel packaging. It is distinct from the LP2951 and LP2957 series which offer different current ratings or pin configurations.

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

Does the LP2954ISX/NOPB support adjustable output voltages?

No, the LP2954ISX/NOPB is a fixed-output regulator providing a constant 5V. Adjustable versions are available in the LP2954 family but have different part numbers.

What protection features are included in this regulator?

The device includes internal overcurrent limiting, thermal shutdown, and reverse polarity protection to safeguard the circuit during abnormal operating conditions.