LP38842T-1.5 Equivalent & Substitute Parts

Part Overview

The LP38842T-1.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. It delivers 1.5A output current with a fixed 1.5V output and is housed in a TO-220-5 package for through-hole mounting. The main part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications where this regulator is specified in existing designs.

Substiute Parts

LP38842T-1.5

Texas InstrumentsIn Stock: 1053LP38842T-1.5 Datasheet

Current PartRFQ

LP38842T-1.5/NOPB

Texas InstrumentsIn Stock: 1129LP38842T-1.5/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP38842T-1.5 is determined by the following critical parameters:

• Output voltage specification (1.5V fixed)
• Maximum output current capability (1.5A)
• Input voltage rating (5.5V maximum)
• Package type (TO-220-5)
• Dropout voltage performance (0.315V @ 1.5A)
• Thermal and protection characteristics (Over Current, Over Temperature, Under Voltage Lockout)

The LP38842T-1.5/NOPB qualifies as a direct substitute because it maintains identical electrical specifications and physical packaging while offering active product status and improved compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LP38842T-1.5/NOPB is the appropriate substitute for the obsolete LP38842T-1.5. Both parts are electrically and mechanically identical, with all critical performance parameters matching exactly. The primary advantage of the substitute is its active product status, ensuring continued availability and supply chain reliability. Additionally, the LP38842T-1.5/NOPB carries ROHS3 compliance, meeting modern regulatory requirements for new designs and manufacturing processes. The original part's RoHS non-compliant status further supports migration to the substitute for long-term production viability.

Frequently Asked Questions (FAQ)

Q: Can the LP38842T-1.5/NOPB be used as a direct replacement for LP38842T-1.5?

A: Yes. Both parts are electrically and mechanically identical. All output voltage, current, dropout voltage, and thermal specifications are equivalent. The TO-220-5 package pinout and footprint are identical, allowing direct PCB substitution without design modification.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates the part is supplied in tube packaging rather than alternative packaging formats. This designation does not affect electrical performance or compatibility.

Q: Why is the original LP38842T-1.5 listed as obsolete?

A: Obsolete status indicates the part is no longer in active production by Texas Instruments. The LP38842T-1.5/NOPB remains in active production and serves as the current equivalent for this regulator specification.

Q: Are there compliance differences between the two parts?

A: Yes. The LP38842T-1.5/NOPB is ROHS3 compliant, while the original LP38842T-1.5 is RoHS non-compliant. For new designs and manufacturing processes subject to RoHS regulations, the substitute is the required choice.

Q: Will inventory availability differ between these parts?

A: Yes. The LP38842T-1.5/NOPB has active production status with higher inventory availability (1107 pcs reported in stock versus 999 pcs for the obsolete variant). Long-term supply reliability favors the substitute.

Q: Are the thermal and protection characteristics identical?

A: Yes. Both parts provide identical Over Current, Over Temperature, and Under Voltage Lockout (UVLO) protection. Operating temperature range (-40°C ~ 125°C) and quiescent current (30 µA) are identical.