LP2992IM5X-1.5 Equivalent & Substitute Parts

Part Overview

The LP2992IM5X-1.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive 1.5V output at 250mA in a surface-mount SOT-23-5 package. The part is currently listed with Last Time Buy status, indicating limited availability and the necessity to identify equivalent alternatives for ongoing design requirements and production planning.

Substiute Parts

LP2992IM5X-1.5

Texas InstrumentsIn Stock: 2331LP2992IM5X-1.5 Datasheet

Current PartRFQ

LP2992AIM5-1.5/NOPB

National SemiconductorIn Stock: 2275LP2992AIM5-1.5/NOPB Datasheet

Parametric EquivalentRFQ

LP2992AIM5X-1.5/NOPB

National SemiconductorIn Stock: 1795LP2992AIM5X-1.5/NOPB Datasheet

Parametric EquivalentRFQ

LP2992IM5-1.5/NOPB

Texas InstrumentsIn Stock: 3537LP2992IM5-1.5/NOPB Datasheet

Parametric EquivalentRFQ

LP2992IM5X-1.5/NOPB

Texas InstrumentsIn Stock: 1188LP2992IM5X-1.5/NOPB Datasheet

Parametric EquivalentRFQ

SPX3819M5-L-1-5/TR

MaxLinear, Inc.In Stock: 22964SPX3819M5-L-1-5/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP2992IM5X-1.5 is determined by the following critical parameters:

• Output voltage: 1.5V fixed
• Maximum input voltage: 16V
• Output current capability: 250mA minimum
• Package type: SOT-23-5 (SC-74A, SOT-753)
• Control features: Enable function
• Protection: Over Current, Over Temperature, Short Circuit
• Operating temperature range: -40°C ~ 125°C
• Mounting: Surface Mount

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical specifications and are pin-compatible replacements. These include LP2992AIM5-1.5/NOPB, LP2992AIM5X-1.5/NOPB, and LP2992IM5-1.5/NOPB from Texas Instruments and National Semiconductor.

Manufacturer Recommended Substitute (SPX3819M5-L-1-5/TR) provides enhanced performance characteristics while maintaining core functional compatibility. This part delivers higher output current (500mA vs. 250mA) and lower quiescent current (8 µA vs. 95 µA), offering design flexibility for applications requiring improved efficiency or higher load capacity.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Identical Specifications):

LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB from National Semiconductor are active products offering direct substitution with identical electrical parameters. These parts are recommended for immediate procurement to mitigate Last Time Buy constraints on the LP2992IM5X-1.5.

For Enhanced Performance Applications:

SPX3819M5-L-1-5/TR from MaxLinear, Inc. is an active product that provides superior performance characteristics: doubled output current capability (500mA) and significantly reduced quiescent current (8 µA). This part is suitable for designs where improved efficiency or higher load capacity is beneficial, provided the application can accommodate the enhanced specifications without circuit modification.

Compliance Considerations:

All recommended substitutes maintain RoHS compliance and operate within the specified temperature range. The LP2992IM5-1.5/NOPB from Texas Instruments, while ROHS3 compliant, carries Obsolete status and should not be selected for new designs despite parametric equivalence.

Frequently Asked Questions (FAQ)

Q: Can LP2992AIM5-1.5/NOPB directly replace LP2992IM5X-1.5 in existing designs?

A: Yes. LP2992AIM5-1.5/NOPB is a parametric equivalent with identical output voltage (1.5V), output current (250mA), input voltage rating (16V), dropout voltage (0.85V @ 250mA), quiescent current (95 µA), and package type (SOT-23-5). Pin configuration and functional behavior are identical.

Q: What is the difference between LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB?

A: Both parts are parametric equivalents from National Semiconductor with identical electrical specifications. The difference lies in packaging format: LP2992AIM5-1.5/NOPB is supplied in Bulk packaging, while LP2992AIM5X-1.5/NOPB is supplied in Bulk packaging. Selection depends on procurement and assembly requirements.

Q: Is SPX3819M5-L-1-5/TR a direct replacement?

A: SPX3819M5-L-1-5/TR is functionally compatible but not a direct replacement. While it maintains the same 1.5V output, 16V input rating, SOT-23-5 package, and operating temperature range, it provides enhanced specifications: 500mA output current (vs. 250mA) and 8 µA quiescent current (vs. 95 µA). Circuit redesign is not required, but the enhanced performance may be leveraged for improved efficiency.

Q: Why is LP2992IM5-1.5/NOPB not recommended despite being a parametric equivalent?

A: LP2992IM5-1.5/NOPB carries Obsolete product status. Although electrically equivalent and ROHS3 compliant, obsolete parts present supply chain risk. Active alternatives (LP2992AIM5-1.5/NOPB, LP2992AIM5X-1.5/NOPB) are preferred for new designs and ongoing production.

Q: What protection features are included in these regulators?

A: All substitute parts include Over Current, Over Temperature, and Short Circuit protection. SPX3819M5-L-1-5/TR additionally includes Reverse Polarity protection, providing enhanced circuit safeguarding.

Q: Are all substitute parts RoHS compliant?

A: Yes. LP2992AIM5-1.5/NOPB and LP2992AIM5X-1.5/NOPB comply with RoHS standards. SPX3819M5-L-1-5/TR is RoHS Compliant. All parts are suitable for applications requiring RoHS compliance.

Q: What is the significance of the SOT-23-5 package designation?

A: SOT-23-5 (also designated SC-74A, SOT-753) is a five-pin surface-mount package. All listed substitutes use this identical package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.