LP2985IM5X-3.6/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985IM5X-3.6/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.6V output applications with 150mA current capacity in a SOT-23-5 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device provides regulated power management with integrated protection features including over-current, over-temperature, and short-circuit protection.

Substiute Parts

LP2985IM5X-3.6/NOPB

Texas InstrumentsIn Stock: 4273LP2985IM5X-3.6/NOPB Datasheet

Current PartRFQ

LP2985AIM5-3.6/NOPB

Texas InstrumentsIn Stock: 1000267LP2985AIM5-3.6/NOPB Datasheet

Parametric EquivalentRFQ

LP2985AIM5X-3.6/NOPB

National SemiconductorIn Stock: 4385LP2985AIM5X-3.6/NOPB Datasheet

Parametric EquivalentRFQ

LP2985IM5-3.6/NOPB

Texas InstrumentsIn Stock: 23354LP2985IM5-3.6/NOPB Datasheet

Parametric EquivalentRFQ

MIC5205-3.6YM5-TR

Microchip TechnologyIn Stock: 9165MIC5205-3.6YM5-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LP2985IM5X-3.6/NOPB is determined by the following critical parameters: fixed 3.6V output voltage, 150mA output current capability, SOT-23-5 package compatibility, maximum 16V input voltage rating, and operating temperature range of -40°C to 125°C. All substitute parts must maintain identical output voltage and current specifications, identical package form factor, and compatible electrical characteristics within the specified operating conditions.

The substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments and National Semiconductor): LP2985AIM5-3.6/NOPB, LP2985AIM5X-3.6/NOPB, and LP2985IM5-3.6/NOPB share identical electrical specifications with the main part, including 0.58V maximum dropout voltage and 95 µA quiescent current. These parts differ only in product status (active versus obsolete) and packaging format (Tape & Reel, Cut Tape & Digi-Reel, or unspecified).

Manufacturer Recommended Substitute (Microchip Technology): MIC5205-3.6YM5-TR provides functional equivalence with identical output voltage, current rating, and package type. This part exhibits improved performance characteristics including lower dropout voltage (0.35V @ 150mA) and higher PSRR (75dB @ 100Hz), though with slightly elevated quiescent current (150 µA).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete LP2985IM5X-3.6/NOPB, the LP2985IM5-3.6/NOPB from Texas Instruments is the direct replacement, offering identical electrical specifications and active product status with established supply chain availability. This part maintains full compatibility with existing designs without circuit modifications.

The LP2985AIM5-3.6/NOPB and LP2985AIM5X-3.6/NOPB are functionally equivalent alternatives from Texas Instruments and National Semiconductor respectively, both with active product status and identical performance characteristics. These options provide flexibility in packaging format selection (Tape & Reel or standard packaging).

The MIC5205-3.6YM5-TR from Microchip Technology is a manufacturer-recommended substitute suitable for new designs or redesigns where improved performance characteristics are beneficial. This part delivers superior dropout voltage performance (0.35V versus 0.58V) and higher power supply rejection ratio (75dB versus 45dB), though with marginally increased quiescent current consumption (150 µA versus 95 µA). All substitute parts maintain ROHS3 compliance and identical operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-3.6/NOPB directly replace LP2985IM5X-3.6/NOPB in existing designs?

A: Yes. Both parts share identical electrical specifications including output voltage, current rating, dropout voltage, quiescent current, and operating temperature range. The primary difference is product status (active versus obsolete) and packaging format. No circuit modifications are required.

Q: What is the difference between LP2985IM5-3.6/NOPB and LP2985AIM5-3.6/NOPB?

A: Both parts are from Texas Instruments with identical electrical performance. The primary distinction is packaging format: LP2985IM5-3.6/NOPB is supplied in Cut Tape & Digi-Reel format, while LP2985AIM5-3.6/NOPB is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Is MIC5205-3.6YM5-TR a direct drop-in replacement?

A: MIC5205-3.6YM5-TR is functionally compatible with identical output voltage, current rating, and SOT-23-5 package. However, it exhibits different electrical characteristics: lower dropout voltage (0.35V versus 0.58V) and higher quiescent current (150 µA versus 95 µA). For applications sensitive to these parameters, circuit evaluation is necessary before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts, including LP2985AIM5-3.6/NOPB, LP2985AIM5X-3.6/NOPB, LP2985IM5-3.6/NOPB, and MIC5205-3.6YM5-TR, maintain ROHS3 compliance status.

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

A: All substitute parts use the identical SOT-23-5 (SC-74A) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes. No board redesign is required for package-compatible substitutes.

Q: Which substitute part offers the best performance improvement?

A: MIC5205-3.6YM5-TR provides improved dropout voltage performance (0.35V versus 0.58V at 150mA) and superior power supply rejection ratio (75dB at 100Hz versus 45dB at 1kHz). These improvements reduce power dissipation and enhance noise rejection in sensitive applications.