LM2940LD-5.0/NOPB

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

The LM2940LD-5.0/NOPB is a fixed-output low-dropout linear voltage regulator manufactured by Texas Instruments, providing a stable 5 V output with a maximum current capability of 1 A. It operates within an input voltage range up to 26 V and features a typical dropout voltage of 0.5 V at full load. The device incorporates high power supply rejection ratio (PSRR) for noise reduction and includes comprehensive protection mechanisms such as thermal shutdown, current limiting, and reverse polarity protection. Designed for surface-mount applications, it utilizes an 8-pin WSON package with an exposed pad for enhanced thermal dissipation.

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

• Provides a fixed 5 V regulated output with 1 A continuous current capacity
• Features high power supply rejection ratio to minimize ripple and noise
• Includes integrated thermal overload and short-circuit current limiting protection
• Supports operation over an extended industrial temperature range

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

• Power supplies for microcontrollers and embedded systems
• Battery-powered equipment requiring efficient voltage regulation
• Communication systems needing clean power rails
• Industrial control modules operating in harsh environments

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

Verify the specific suffix 'NOPB' indicates lead-free packaging compliant with RoHS standards. Confirm the 'LD' designation corresponds to the WSON-8 package variant rather than other pin-compatible packages like TO-220 or D2PAK. Ensure the datasheet revision matches the required specifications for your design. Cross-reference the manufacturer part number directly with official Texas Instruments documentation to avoid counterfeit components.

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

Select this component when a fixed 5 V rail is required with moderate current demands up to 1 A. It is suitable for designs where input voltages remain relatively close to the output level, leveraging its low dropout characteristic. Consider the thermal performance of the WSON package for heat dissipation requirements. This regulator is appropriate for general-purpose applications where high PSRR and built-in protections are prioritized over ultra-low quiescent current consumption.

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

This device belongs to the LM2940 family of low-dropout regulators from Texas Instruments. The family offers various output voltages and package options to suit different power management needs. The LM2940 series is known for its robustness and reliability in standard linear regulation tasks. The LD suffix specifically identifies the small form-factor WSON package version within this broader product line.

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

LM2940S-5.0/NOPB: Pin-compatible alternative in a larger TO-263 package with similar electrical characteristics but different thermal properties.