LM140K-5.0 Linear Voltage Regulator

Part Overview

The LM140K-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications. This through-hole mounted regulator delivers 1A output current and operates across an industrial temperature range of -55°C to 125°C. The device is classified as Active product status and is ROHS3 compliant, making it suitable for modern electronic applications requiring regulated 5V power distribution. Alternative part numbers may be necessary due to inventory availability, supply chain considerations, or specific procurement requirements.

Substiute Parts

LM140K-5.0

Texas InstrumentsIn Stock: 1750LM140K-5.0 Datasheet

Current PartRFQ

LM140K-5.0/NOPB

Texas InstrumentsIn Stock: 861LM140K-5.0/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM140K-5.0 is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 5V fixed
• Output current capability: 1A
• Input voltage maximum rating: 35V
• Voltage dropout characteristics: 2V @ 1A
• Quiescent current: 6 mA
• PSRR performance: 80dB (120Hz)
• Package configuration: TO-204AA, TO-3
• Mounting technology: Through Hole
• Protection features: Over Temperature, Short Circuit
• Operating temperature range: -55°C to 125°C
• Compliance certifications: ROHS3 Compliant

The substitute part LM140K-5.0/NOPB maintains identical electrical and mechanical specifications, differing only in packaging designation (NOPB indicates no plumbum/lead-free processing variant).

Parameter Comparison

Engineering Selection Recommendations

Both the LM140K-5.0 and LM140K-5.0/NOPB are Active product status components from Texas Instruments with identical electrical performance and mechanical specifications. Selection between these parts should be based on procurement availability and supply chain requirements. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility for modern applications. The /NOPB designation indicates lead-free processing compliance, which may be required for specific manufacturing or regional standards. No technical performance differentiation exists between these part numbers.

Frequently Asked Questions (FAQ)

Q: Can LM140K-5.0/NOPB be used as a direct replacement for LM140K-5.0?

A: Yes. Both part numbers are electrically and mechanically identical. The /NOPB suffix indicates lead-free processing and does not affect functional performance or electrical characteristics.

Q: What determines if a part is a valid substitute for the LM140K-5.0?

A: Valid substitutes must maintain identical specifications across output voltage (5V), output current (1A), input voltage maximum (35V), voltage dropout (2V @ 1A), quiescent current (6 mA), PSRR (80dB at 120Hz), package type (TO-204AA, TO-3), mounting method (Through Hole), protection features (Over Temperature, Short Circuit), and operating temperature range (-55°C to 125°C).

Q: Are there any compliance differences between these part numbers?

A: No. Both LM140K-5.0 and LM140K-5.0/NOPB carry identical RoHS3 compliance, REACH unaffected status, and MSL rating of 1 (Unlimited).

Q: What is the significance of the TO-3 package for this regulator?

A: The TO-3 package is a through-hole mounted metal can configuration suitable for high-current applications and provides robust thermal characteristics for the 1A output current specification.

Q: Can this regulator be used in applications requiring input voltages up to 35V?

A: Yes. The LM140K-5.0 is rated for maximum input voltage of 35V, with a maximum dropout voltage of 2V at 1A output current.