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LM2941S/NOPB

TILM2941S/NOPB

Texas Instruments
Linear Voltage Regulator IC Positive Adjustable 1 Output 1A TO-263 (DDPAK-5)
NRND8,100 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LM2941S/NOPB is a 1A low dropout positive adjustable voltage regulator designed for applications requiring a precise output voltage between 5V and 20V. It features a dropout voltage of typically 0.5V at 1A, making it suitable for systems where the input-to-output voltage differential is small. The device includes an ON/OFF pin for logic-level control and comprehensive protection circuitry including reverse battery and short-circuit protection.

Why Choose This Part

The LM2941S/NOPB is distinguished by its robust protection suite, including reverse battery protection and a 26V maximum input rating. Its adjustable output provides design flexibility, while the DDPAK package offers excellent thermal dissipation for high-current loads up to 1A.

Applications

Industrial Control Systems
Providing regulated power to logic circuits from fluctuating DC industrial rails.
Battery Powered Equipment
Utilizing the low dropout characteristic to extend the useful life of battery packs as voltage drops.
Automotive Electronics
Leveraging reverse polarity and mirror image insertion protection to survive harsh vehicle electrical environments.
Post-Regulation for Switching Supplies
Filtering high-frequency switching noise for sensitive analog or RF stages.

Key Specifications

Output Type Adjustable
Mounting Type Surface Mount
Package / Case TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Control Features Enable
Current - Output 1A
Protection Features Over Temperature, Reverse Polarity, Short Circuit
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC
Voltage - Input (Max) 26V
Voltage Dropout (Max) 1V @ 1A
Current - Supply (Max) 15 mA
Voltage - Output (Max) 20V
Supplier Device Package TO-263 (DDPAK-5)
Current - Quiescent (Iq) 10 mA
Voltage - Output (Min/Fixed) 5V

Getting Started

When designing with the LM2941S/NOPB, ensure a minimum output capacitance of 22uF with an ESR between 0.1 and 1 ohm is used to maintain stability. The output voltage is set via an external resistive divider connected to the feedback pin, following the formula provided in the datasheet. Proper thermal management via the DDPAK tab is required to handle the power dissipation at high input-output differentials.

LM2941 Family

Part NumberDifferenceStock
LM2941SX/NOPB X/NOPB 296

Categories

Power Management > LDO Voltage Regulators