LP2985IM5-2.9/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985IM5-2.9/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a positive fixed output regulator delivering 150mA at 2.9V in a SOT-23-5 surface mount package. This part is currently obsolete, making identification of equivalent and substitute components essential for ongoing design support, production continuity, and system maintenance. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible functionality with potential performance enhancements or different output configurations.

Substiute Parts

LP2985IM5-2.9/NOPB

Texas InstrumentsIn Stock: 2420LP2985IM5-2.9/NOPB Datasheet

Current PartRFQ

TPS7A2401DBVR

Texas InstrumentsIn Stock: 19846TPS7A2401DBVR Datasheet

MFR RecommendedRFQ

LP2985A-29DBVR

Texas InstrumentsIn Stock: 6349LP2985A-29DBVR Datasheet

Parametric EquivalentRFQ

LP2985AIM5-2.9/NOPB

Texas InstrumentsIn Stock: 1960LP2985AIM5-2.9/NOPB Datasheet

Parametric EquivalentRFQ

MIC5205-2.9YM5-TR

Microchip TechnologyIn Stock: 835MIC5205-2.9YM5-TR Datasheet

MFR RecommendedRFQ

MIC5207-2.9YM5-TR

Microchip TechnologyIn Stock: 869MIC5207-2.9YM5-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2985IM5-2.9/NOPB are classified into two categories based on substitution criteria:

Parametric Equivalents maintain identical electrical specifications: 2.9V fixed output, 150mA output current, 16V maximum input voltage, SOT-23-5 package, and -40°C to 125°C operating temperature range. These parts are direct functional replacements with no circuit redesign required.

Manufacturer Recommended Substitutes offer enhanced performance characteristics while maintaining compatibility with the same package and operating temperature range. These include improved quiescent current, lower dropout voltage, or higher output current capability.

Key Parameters Determining Substitution:

• Output voltage configuration (Fixed 2.9V)
• Output current rating (minimum 150mA)
• Maximum input voltage (16V or higher)
• Package type (SOT-23-5)
• Operating temperature range (-40°C to 125°C)
• Surface mount compatibility

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

LP2985A-29DBVR is the primary parametric equivalent, offering identical electrical specifications with active product status. This part is recommended for new production runs and long-term supply continuity. LP2985AIM5-2.9/NOPB provides equivalent functionality but carries obsolete status, limiting its suitability for new designs despite matching specifications.

For Enhanced Performance:

MIC5205-2.9YM5-TR (Microchip Technology) delivers improved dropout voltage performance (0.35V vs. 0.58V) while maintaining 150mA output current and identical package configuration. This part is active and ROHS3 compliant, suitable for applications requiring lower power dissipation.

MIC5207-2.9YM5-TR offers increased output current capability (180mA vs. 150mA) with improved dropout voltage (0.4V), providing headroom for higher load applications within the same SOT-23-5 package footprint.

For Advanced Applications:

TPS7A2401DBVR provides the highest performance profile with adjustable output voltage (1.24V - 17.75V), superior quiescent current (4.5 µA vs. 95 µA), lowest dropout voltage (0.25V @ 200mA), and highest output current (200mA). This part requires external resistor network configuration for 2.9V output but delivers significant power efficiency improvements. Active product status and ROHS3 compliance support long-term availability.

All recommended substitutes maintain SOT-23-5 package compatibility, -40°C to 125°C operating temperature range, and ROHS3 compliance with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can LP2985A-29DBVR directly replace LP2985IM5-2.9/NOPB without circuit modification?

A: Yes. LP2985A-29DBVR is a parametric equivalent with identical output voltage (2.9V), output current (150mA), maximum input voltage (16V), dropout voltage (0.58V @ 150mA), quiescent current (95 µA), and operating temperature range (-40°C to 125°C). The SOT-23-5 package pinout is identical, requiring no PCB redesign.

Q: What is the primary advantage of MIC5205-2.9YM5-TR over the original part?

A: MIC5205-2.9YM5-TR reduces dropout voltage from 0.58V to 0.35V at 150mA output current, decreasing power dissipation and improving thermal performance. This enhancement is particularly beneficial in battery-powered or thermally constrained applications. The part maintains identical output voltage, current rating, and package configuration.

Q: When should TPS7A2401DBVR be selected instead of fixed-output equivalents?

A: TPS7A2401DBVR is selected when system design requires adjustable output voltage capability, superior quiescent current performance (4.5 µA), or higher output current (200mA). This part requires external resistor configuration to set 2.9V output but delivers significant power efficiency gains. Selection depends on design flexibility and power budget requirements.

Q: Are all substitute parts compatible with existing PCB layouts?

A: Yes. All listed substitute parts use the SC-74A SOT-753 (SOT-23-5) package with identical pinout and footprint. No PCB modification is required for mechanical or electrical compatibility. Thermal performance may vary due to different quiescent current and dropout voltage characteristics.

Q: What is the inventory status for each substitute part?

A: LP2985A-29DBVR: 6,300 pcs. LP2985AIM5-2.9/NOPB: 1,916 pcs. MIC5205-2.9YM5-TR: 756 pcs. MIC5207-2.9YM5-TR: 842 pcs. TPS7A2401DBVR: 19,794 pcs. Inventory levels support production requirements across all substitute options.

Q: Do all parts meet RoHS and REACH compliance requirements?

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications. MSL 1 rating (unlimited moisture sensitivity) applies to all parts.