LM2990T-5.0 Equivalent & Substitute Parts

Part Overview

The LM2990T-5.0 is a linear voltage regulator IC from Texas Instruments designed for negative fixed output applications. It delivers -5V at 1.8A output current in a TO-220-3 through-hole package. This device is classified as Last Time Buy, indicating end-of-life status. Identifying equivalent substitute parts is essential for design continuity, long-term supply chain planning, and production support beyond the manufacturer's active production window.

Substiute Parts

LM2990T-5.0

Texas InstrumentsIn Stock: 1378LM2990T-5.0 Datasheet

Current PartRFQ

LM2990T-5.0/NOPB

Texas InstrumentsIn Stock: 3137LM2990T-5.0/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2990T-5.0 is determined by strict equivalence across the following critical parameters:

• Output voltage: -5V fixed
• Output current capability: 1.8A minimum
• Input voltage tolerance: -26V maximum
• Package type: TO-220-3 through-hole
• Voltage dropout: 1V @ 1A maximum
• Protection features: Over temperature and short circuit protection
• Operating temperature range: -40°C ~ 125°C
• Compliance standards: ROHS3, REACH Unaffected

Only parts matching all these specifications across electrical performance and physical form factor qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The LM2990T-5.0/NOPB is the direct equivalent substitute for the LM2990T-5.0. Both parts are manufactured by Texas Instruments and share identical electrical specifications and physical packaging. The primary distinction is product status: the original LM2990T-5.0 is designated Last Time Buy, while the LM2990T-5.0/NOPB maintains Active status, indicating ongoing availability and production support.

The /NOPB suffix denotes lead-free plating compliance. Both parts meet ROHS3 and REACH requirements, ensuring regulatory compliance for current manufacturing standards. Selection between these variants should be based on supply chain availability and production timeline requirements. The Active status of LM2990T-5.0/NOPB makes it the preferred choice for new designs and long-term production planning.

Frequently Asked Questions (FAQ)

Q: What does the /NOPB suffix mean? A: NOPB indicates "No Plumbum" (lead-free). This denotes the part uses lead-free plating and solder-compatible finishes, meeting modern environmental and manufacturing standards.

Q: Are LM2990T-5.0 and LM2990T-5.0/NOPB pin-for-pin compatible? A: Yes. Both parts use the TO-220-3 package with identical pinout and electrical characteristics. Direct PCB substitution is possible without circuit modification.

Q: Can I use these parts interchangeably in my design? A: Yes, provided your application operates within the specified parameters: -5V output, 1.8A maximum output current, input voltage not exceeding -26V, and operating temperature range -40°C to 125°C.

Q: Why is the original LM2990T-5.0 marked Last Time Buy? A: Last Time Buy status indicates the manufacturer has discontinued active production. Existing inventory may be available, but future availability is not guaranteed. The LM2990T-5.0/NOPB remains in active production.

Q: What are the thermal considerations for TO-220-3 mounting? A: The TO-220-3 package requires adequate heatsinking for 1.8A continuous operation. Thermal design must account for the 1V dropout voltage at maximum current, which generates approximately 1.8W of dissipation under worst-case conditions.

Q: Are there any differences in protection features between these parts? A: No. Both parts include identical over-temperature and short-circuit protection mechanisms, providing equivalent circuit protection in all operating conditions.