LP2981IM5X-3.6 Equivalent & Substitute Parts

Part Overview

The LP2981IM5X-3.6 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 3.6V output at 100mA with integrated protection features including over-current, over-temperature, and short-circuit protection. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LP2981IM5X-3.6

Texas InstrumentsIn Stock: 1911LP2981IM5X-3.6 Datasheet

Current PartRFQ

LP2981AIM5-3.6/NOPB

Texas InstrumentsIn Stock: 5904LP2981AIM5-3.6/NOPB Datasheet

Parametric EquivalentRFQ

LP2981AIM5X-3.6/NOPB

Texas InstrumentsIn Stock: 4299LP2981AIM5X-3.6/NOPB Datasheet

Parametric EquivalentRFQ

LP2981IM5-3.6/NOPB

Texas InstrumentsIn Stock: 1462LP2981IM5-3.6/NOPB Datasheet

Parametric EquivalentRFQ

LP2981IM5X-3.6/NOPB

National SemiconductorIn Stock: 3033LP2981IM5X-3.6/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2981IM5X-3.6 is determined by strict equivalence across the following critical parameters:

• Output voltage: 3.6V fixed
• Output current capability: 100mA
• Maximum input voltage: 16V
• Dropout voltage: 0.37V @ 100mA
• Quiescent current: 95 µA
• PSRR: 63dB (1kHz)
• Protection features: Over-current, over-temperature, short-circuit
• Package type: SOT-23-5 (SC-74A, SOT-753)
• Operating temperature range: -40°C ~ 125°C

All identified substitute parts maintain identical electrical specifications and mechanical compatibility. Differences exist only in product status, RoHS compliance, and packaging format (Cut Tape, Tape & Reel, or Bulk).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete LP2981IM5X-3.6, the following selection criteria apply:

For new designs or production requiring RoHS3 compliance: LP2981AIM5X-3.6/NOPB is the primary choice. This part is currently active, RoHS3 compliant, and supplied in Tape & Reel format suitable for automated assembly.

For applications with existing RoHS non-compliance requirements: LP2981IM5X-3.6/NOPB from National Semiconductor provides electrical and mechanical equivalence while maintaining active product status.

For cost-optimized procurement with RoHS3 compliance: LP2981AIM5-3.6/NOPB or LP2981IM5-3.6/NOPB offer RoHS3 compliance in Cut Tape format, though both are designated Last Time Buy status.

All substitute parts maintain identical electrical performance and package compatibility with the original LP2981IM5X-3.6.

Frequently Asked Questions (FAQ)

Q: Can LP2981AIM5X-3.6/NOPB directly replace LP2981IM5X-3.6 in existing designs?

A: Yes. Both parts deliver identical electrical specifications: 3.6V fixed output, 100mA current capability, 0.37V dropout voltage, and SOT-23-5 package. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

Q: What is the difference between LP2981AIM5X-3.6/NOPB and LP2981AIM5-3.6/NOPB?

A: Both parts are electrically identical with the same output voltage, current, and protection features. The difference is packaging format: LP2981AIM5X-3.6/NOPB is supplied in Tape & Reel (TR) format for automated assembly, while LP2981AIM5-3.6/NOPB is supplied in Cut Tape (CT) format. LP2981AIM5X-3.6/NOPB is currently Active; LP2981AIM5-3.6/NOPB is Last Time Buy.

Q: Is the National Semiconductor LP2981IM5X-3.6/NOPB equivalent to the Texas Instruments version?

A: Yes, electrically and mechanically equivalent. Both deliver 3.6V at 100mA with identical dropout voltage, quiescent current, and PSRR specifications in SOT-23-5 package. The National Semiconductor version is currently Active and supplied in Bulk format.

Q: Which substitute part should be selected for high-volume production?

A: LP2981AIM5X-3.6/NOPB is recommended for high-volume production. It is currently Active, RoHS3 compliant, and supplied in Tape & Reel format optimized for automated pick-and-place assembly.

Q: Are there any functional differences between the substitute parts?

A: No. All substitute parts maintain identical output voltage (3.6V), output current (100mA), input voltage rating (16V max), dropout voltage (0.37V @ 100mA), quiescent current (95 µA), PSRR (63dB at 1kHz), and protection features (over-current, over-temperature, short-circuit). Differences are limited to product lifecycle status, RoHS compliance, and packaging format.