LP2980AIM5-1.8

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

The LP2980AIM5-1.8 is a micropower, fixed positive low-dropout (LDO) voltage regulator manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 1.8 V output with a maximum load current of 50 mA. The device operates from an input voltage range of 2.1 V to 16 V and features a typical dropout voltage of 120 mV at full load. It incorporates an enable control pin for power management and maintains a quiescent current of approximately 65 µA. The component is housed in a five-pin SOT-23 package and is rated for operation over an industrial temperature range of -40°C to +125°C.

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

• Fixed 1.8 V output voltage with 50 mA load capability
• Ultra-low quiescent current for battery efficiency
• Integrated enable control for system power management
• Low dropout voltage ensuring stable regulation near input limits

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

• Portable consumer electronics requiring efficient voltage regulation
• Battery-powered systems utilizing micropower regulators
• Embedded circuits needing fixed low-voltage rails
• Industrial equipment operating within extended temperature ranges

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

Verify the manufacturer origin carefully, as National Semiconductor was acquired by Texas Instruments. Confirm that the specific suffix matches the required package and temperature grade. Ensure compliance with current RoHS directives if applicable to your region. Cross-reference the datasheet revision to confirm pinout and electrical characteristics align with your design requirements before finalizing procurement.

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

Select this component when a fixed 1.8 V rail is required with minimal static power consumption. It is suitable for applications where the input voltage remains close to the output level, leveraging its low dropout characteristic. Consider the 50 mA current limit against peak load demands. The SOT-23-5 package offers a compact footprint for space-constrained designs compared to larger regulator packages.

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

This regulator belongs to the LP2980-N series, designed for micropower applications. It serves as a direct successor to earlier linear regulators, offering improved dropout performance and lower standby currents. The series is widely used in portable devices where battery life is critical. The transition from National Semiconductor to Texas Instruments ensures continued support and availability through TI's distribution channels.

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

LP2980IM5-1.8/NOPB

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

What is the minimum input voltage required for proper regulation?

The minimum input voltage is 2.1 V, which accounts for the dropout voltage plus the 1.8 V output.

Does the device include thermal protection?

Yes, the LP2980 includes internal circuitry to protect against excessive junction temperatures.