LP38842T-1.2 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP38842T-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 1.5A output current at a fixed 1.2V output with a maximum dropout voltage of 0.315V at full load. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing production and maintenance applications.

Substiute Parts

LP38842T-1.2

Texas InstrumentsIn Stock: 1139LP38842T-1.2 Datasheet

Current PartRFQ

LP38842T-1.2/NOPB

Texas InstrumentsIn Stock: 1358LP38842T-1.2/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP38842T-1.2 is determined by the following critical parameters:

• Fixed output voltage of 1.2V
• Output current capability of 1.5A minimum
• TO-220-5 package configuration
• Maximum input voltage of 5.5V
• Dropout voltage specification of 0.315V @ 1.5A
• Integrated protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range of -40°C to 125°C

The LP38842T-1.2/NOPB variant meets all these criteria and represents the direct equivalent with improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LP38842T-1.2/NOPB is the direct functional equivalent of the LP38842T-1.2. Both parts share identical electrical specifications, output voltage, current rating, and thermal characteristics. The primary distinction is product status and regulatory compliance.

The LP38842T-1.2/NOPB carries Active product status from Texas Instruments, ensuring continued availability and support. Additionally, this variant meets ROHS3 compliance requirements, whereas the original LP38842T-1.2 is RoHS non-compliant. For applications requiring regulatory compliance or long-term component availability, the LP38842T-1.2/NOPB is the appropriate selection.

Both parts are supplied in TO-220-5 through-hole packages and maintain identical electrical performance across the specified operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can the LP38842T-1.2/NOPB directly replace the LP38842T-1.2 in existing designs?

A: Yes. The LP38842T-1.2/NOPB is electrically and mechanically identical to the LP38842T-1.2. Both deliver 1.5A at 1.2V fixed output with identical dropout voltage, quiescent current, and protection features. The TO-220-5 package pinout is unchanged.

Q: What is the significance of the "/NOPB" suffix?

A: The "/NOPB" designation indicates the part is supplied without lead (Pb), reflecting RoHS3 compliance. This is a packaging and compliance variant of the base LP38842T-1.2 design with no impact on electrical performance.

Q: Why is the original LP38842T-1.2 marked as Obsolete?

A: The Obsolete status indicates Texas Instruments has discontinued this specific variant. The LP38842T-1.2/NOPB represents the current production equivalent and should be used for new designs and ongoing procurement.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate identically across the -40°C to 125°C temperature range with the same 0.315V maximum dropout voltage at 1.5A load current and 80dB to 65dB PSRR specification.

Q: What packaging options are available?

A: Both the LP38842T-1.2 and LP38842T-1.2/NOPB are supplied in TO-220-5 through-hole packages. The LP38842T-1.2/NOPB is available in Tube packaging for production quantities.