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Ⅰ.Overview of product

The LM2940S-12/NOPB is a high-performance low dropout (LDO) linear voltage regulator from Texas Instruments, designed for reliable power management in diverse electronic systems. It delivers a fixed 12V output with robust protection and stable performance across extreme operating conditions.

 
Ⅱ.Core parameter

Category:Integrated Circuits (ICs),Power Management (PMIC),Voltage Regulators - Linear,Low Drop Out (LDO) Regulators

Mfr:Texas Instruments

Packaging:Tube

Part Status:Active

Output Configuration:Positive

Output Type:Fixed

Voltage - Input (Max):26V

Voltage - Output (Min/Fixed):12V

Voltage Dropout (Max):1V @ 1A

Current - Quiescent (Iq):10 mA

Current - Supply (Max):15 mA

PSRR:66dB (120Hz)

Protection Features:Over Current, Over Temperature, Reverse Polarity, Short Circuit

Operating Temperature:-40°C ~ 125°C

Mounting Type:Surface Mount

Package / Case:TO-263-4, D2PAK (3 Leads + Tab), TO-263AA

Ⅲ.Main characteristics

Fixed 12V Output:Ensures consistent power delivery for sensitive components

Low Dropout Voltage:1V @ 1A enables efficient operation even with small input-output voltage differentials

High PSRR:66dB @ 120Hz minimizes noise interference from input sources

Comprehensive Protection:Overcurrent, overtemperature, reverse polarity, and short circuit protection enhance system reliability and component longevity

Wide Temp Range:-40°C to 125°C suits harsh industrial and automotive environments

Compact SMD Package:Surface-mount TO-263-4/D2PAK offers a space-saving footprint and efficient heat dissipation via integrated tab

Low Quiescent Current:10mA reduces power consumption in battery-powered or energy-constrained applications

Ⅳ.Application field

Automotive infotainment systems:Powers display modules, audio amplifiers, and navigation units

Industrial sensors:Provides stable power for temperature, pressure, and motion sensors in manufacturing equipment

Portable medical devices:Supports low-power operation in blood glucose monitors and heart rate trackers

Consumer electronics:Regulates voltage for USB hubs, portable chargers, and home automation controllers

Telecommunications equipment:Powers signal processing modules in routers and wireless access points

Automotive lighting systems:Supplies consistent voltage to LED daytime running lights and interior lighting

Ⅴ.Summary

The LM2940S-12/NOPB is a versatile, rugged LDO regulator ideal for applications requiring stable 12V power, robust protection, and reliable performance across extreme conditions. Its compact design and low power consumption make it suitable for both industrial and consumer electronics.