LP38691DTX-5.0 Equivalent & Substitute Parts

Part Overview

The LP38691DTX-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 500mA current capacity in a TO-252-3 surface mount package. This part is classified as obsolete, making identification of active equivalent alternatives essential for new designs and ongoing production support. The substitute part maintains identical electrical specifications and mechanical compatibility while offering improved availability and compliance status.

Substiute Parts

LP38691DTX-5.0

Texas InstrumentsIn Stock: 1682LP38691DTX-5.0 Datasheet

Current PartRFQ

LP38691DTX-5.0/NOPB

Texas InstrumentsIn Stock: 18067LP38691DTX-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The LP38691DTX-5.0/NOPB qualifies as a direct substitute based on the following critical parameters:

• Identical output voltage specification (5V fixed)
• Matching output current rating (500mA)
• Same maximum input voltage (10V)
• Identical voltage dropout characteristic (0.45V @ 500mA)
• Identical quiescent current (55 µA)
• Identical PSRR specification (55dB at 120Hz)
• Same package and pinout (TO-252-3, DPAK)
• Matching operating temperature range (-40°C to 125°C)
• Identical protection features (Over Temperature)

The primary distinction is product status and compliance certification, with the substitute part being active and offering improved regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The LP38691DTX-5.0/NOPB is the appropriate selection for new designs and production continuity. This part maintains complete electrical and mechanical compatibility with the obsolete LP38691DTX-5.0 while offering active product status and ROHS3 compliance certification. The substitute part is available in Tape & Reel packaging format suitable for automated assembly processes, with significantly higher inventory availability (18032 pcs vs 1593 pcs).

For applications requiring the original obsolete part number, the LP38691DTX-5.0/NOPB provides direct functional equivalence without design modification or PCB layout changes.

Frequently Asked Questions (FAQ)

Q: Can LP38691DTX-5.0/NOPB be used as a direct replacement for LP38691DTX-5.0?

A: Yes. Both parts are identical in electrical performance and mechanical package. The substitute part differs only in product status (active vs obsolete) and compliance certifications (ROHS3 compliant vs non-compliant).

Q: Are there any pinout differences between these parts?

A: No. Both parts use the TO-252-3 (DPAK) package with identical pin configuration and function.

Q: What is the difference between the packaging formats?

A: The original LP38691DTX-5.0 is supplied in bulk packaging. The LP38691DTX-5.0/NOPB is supplied in Tape & Reel (TR) format, which is standard for automated assembly and provides better component protection during storage and handling.

Q: Does the substitute part meet current regulatory requirements?

A: Yes. The LP38691DTX-5.0/NOPB is ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

Q: Are there any thermal or performance differences?

A: No. Both parts have identical thermal characteristics, operating temperature range (-40°C to 125°C), and electrical performance specifications including dropout voltage, quiescent current, and PSRR.