LP38859T-0.8 Equivalent & Substitute Parts

Part Overview

The LP38859T-0.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 3A output current at a fixed 0.8V output voltage in a TO-220-5 package configuration. The main part is classified as obsolete, which necessitates identification of active equivalent alternatives to ensure design continuity and procurement availability for new production runs and field replacements.

Substiute Parts

LP38859T-0.8

Texas InstrumentsIn Stock: 2009LP38859T-0.8 Datasheet

Current PartRFQ

LP38859T-0.8/NOPB

Texas InstrumentsIn Stock: 889LP38859T-0.8/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38859T-0.8 is determined by strict equivalence across the following critical parameters:

• Output voltage specification: 0.8V fixed
• Maximum output current: 3A
• Maximum input voltage: 5.5V
• Maximum dropout voltage: 0.45V @ 3A
• Package type: TO-220-5 Formed Leads
• Mounting configuration: Through Hole
• Operating temperature range: -40°C ~ 125°C
• Protection features: Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
• Control features: Soft Start

The LP38859T-0.8/NOPB qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility across all parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

The LP38859T-0.8/NOPB is the direct equivalent for the obsolete LP38859T-0.8. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product status and regulatory compliance: the LP38859T-0.8/NOPB maintains active production status and carries ROHS3 compliance certification, whereas the original part is obsolete and RoHS non-compliant. For new designs and ongoing production, the LP38859T-0.8/NOPB is the appropriate selection. The packaging designation difference (Tube for the substitute versus unspecified for the main part) reflects standard distribution format and does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can LP38859T-0.8/NOPB be used as a direct replacement for LP38859T-0.8?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including output voltage, current rating, dropout voltage, package type, and protection features. Pin configuration and PCB footprint compatibility are maintained.

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

A: The "/NOPB" designation indicates the part is supplied without plumbum (lead-free), reflecting RoHS3 compliance. This is a packaging and compliance designation that does not affect electrical performance or circuit operation.

Q: Why is the original LP38859T-0.8 listed as obsolete?

A: Product obsolescence reflects Texas Instruments' discontinuation of this specific part number. The LP38859T-0.8/NOPB remains in active production and serves as the current equivalent for procurement and design purposes.

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

A: No. Both parts maintain identical thermal characteristics, quiescent current, supply current, and PSRR specifications across the specified frequency range (120Hz ~ 1kHz).

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.