LP2985AIM5X-3.6 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2985AIM5X-3.6 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.6V output applications with 150mA current capacity in SOT-23-5 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design requirements. The device provides regulated power management with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for low-power applications requiring stable 3.6V output from input sources up to 16V.

Substiute Parts

LP2985AIM5X-3.6

Texas InstrumentsIn Stock: 4638LP2985AIM5X-3.6 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

Substitute parts for the LP2985AIM5X-3.6 are qualified based on the following critical parameters that determine functional equivalence:

• Output voltage fixed at 3.6V
• Output current capacity of 150mA
• Maximum input voltage of 16V
• SOT-23-5 surface mount package
• Operating temperature range of -40°C to 125°C
• Enable control feature
• Protection against over-current, over-temperature, and short-circuit conditions

Parts meeting these electrical and mechanical specifications are classified as parametric equivalents. Variations in secondary parameters such as quiescent current, PSRR performance, voltage dropout characteristics, and product status are noted but do not disqualify substitution eligibility when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

LP2985AIM5-3.6/NOPB (Texas Instruments) — Active product status with ROHS3 compliance. Identical electrical specifications to the main part. Tape & Reel packaging available with high inventory levels (1,000,200 pcs). Recommended for new designs and production requiring RoHS compliance.

LP2985AIM5X-3.6/NOPB (National Semiconductor) — Active product status with ROHS3 compliance. Electrical specifications match the main part. Moderate inventory availability (4,300 pcs). Suitable for applications where National Semiconductor sourcing is preferred.

LP2985IM5-3.6/NOPB (Texas Instruments) — Active product status with ROHS3 compliance. Identical electrical specifications to the main part. Cut Tape & Digi-Reel packaging with highest inventory levels (23,300 pcs). Recommended for high-volume production requirements.

MIC5205-3.6YM5-TR (Microchip Technology) — Active product status with ROHS3 compliance. Meets all primary electrical requirements. Offers improved voltage dropout (0.35V vs 0.58V) and higher PSRR (75dB at 100Hz vs 45dB at 1kHz), providing superior performance in noise-sensitive applications. Quiescent current is higher at 150 µA. Reverse polarity protection included. Suitable for applications benefiting from enhanced performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-3.6/NOPB directly replace LP2985AIM5X-3.6?

A: Yes. Both parts share identical output voltage (3.6V), output current (150mA), input voltage rating (16V), voltage dropout (0.58V @ 150mA), quiescent current (95 µA), PSRR (45dB at 1kHz), operating temperature range (-40°C to 125°C), and SOT-23-5 packaging. The primary difference is product status: LP2985AIM5-3.6/NOPB is active while LP2985AIM5X-3.6 is obsolete. LP2985AIM5-3.6/NOPB is available in Tape & Reel packaging with significantly higher inventory.

Q: What are the differences between LP2985IM5-3.6/NOPB and LP2985AIM5-3.6/NOPB?

A: Electrical specifications are identical. The primary difference is packaging format: LP2985IM5-3.6/NOPB is supplied in Cut Tape & Digi-Reel format with higher inventory availability (23,300 pcs vs 1,000,200 pcs). Both are active products with ROHS3 compliance.

Q: Is MIC5205-3.6YM5-TR a suitable replacement?

A: Yes, MIC5205-3.6YM5-TR meets all primary electrical and mechanical requirements. It provides the same 3.6V output, 150mA current capacity, 16V maximum input, SOT-23-5 package, and -40°C to 125°C operating range. Notable differences include lower voltage dropout (0.35V vs 0.58V), higher PSRR (75dB at 100Hz), higher quiescent current (150 µA vs 95 µA), and reverse polarity protection. Select this part for applications requiring superior noise rejection or lower dropout voltage performance.

Q: Are all substitute parts RoHS compliant?

A: The original LP2985AIM5X-3.6 is RoHS non-compliant. All substitute parts (LP2985AIM5-3.6/NOPB, LP2985AIM5X-3.6/NOPB, LP2985IM5-3.6/NOPB, and MIC5205-3.6YM5-TR) are ROHS3 compliant, meeting current environmental regulations.

Q: What packaging options are available?

A: LP2985AIM5-3.6/NOPB is supplied in Tape & Reel (TR) format. LP2985IM5-3.6/NOPB is supplied in Cut Tape (CT) & Digi-Reel format. MIC5205-3.6YM5-TR is supplied in Cut Tape & Digi-Reel format. All use SOT-23-5 surface mount package. Select packaging based on production volume and assembly equipment compatibility.

Q: Which substitute offers the best performance?

A: MIC5205-3.6YM5-TR provides superior performance with 0.35V dropout voltage (vs 0.58V) and 75dB PSRR at 100Hz (vs 45dB at 1kHz). This makes it suitable for noise-sensitive applications. However, it has higher quiescent current (150 µA vs 95 µA). For applications prioritizing low quiescent current, the LP2985 variants are preferable.