LP2985A-29DBVT Equivalent & Substitute Parts

Part Overview

The LP2985A-29DBVT is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) device. It delivers a fixed positive output of 2.9V at 150mA in a surface-mount SOT-23-5 package. The device is marked as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

LP2985A-29DBVT

Texas InstrumentsIn Stock: 874LP2985A-29DBVT Datasheet

Current PartRFQ

LP2985AIM5-2.9/NOPB

Texas InstrumentsIn Stock: 1960LP2985AIM5-2.9/NOPB Datasheet

MFR RecommendedRFQ

LP2985A-29DBVR

Texas InstrumentsIn Stock: 6349LP2985A-29DBVR Datasheet

Parametric EquivalentRFQ

LP2985IM5-2.9/NOPB

Texas InstrumentsIn Stock: 2420LP2985IM5-2.9/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 LP2985A-29DBVT are grouped based on strict electrical and mechanical parameter compatibility:

Primary Substitution Criteria:

• Fixed output voltage of 2.9V
• Output current capability of 150mA or greater
• Maximum input voltage of 16V or higher
• SOT-23-5 package compatibility
• Surface-mount technology
• Operating temperature range of -40°C to 125°C
• Enable control feature
• Over-current, over-temperature, and short-circuit protection

Substitute Categories:

Texas Instruments Direct Equivalents: Parts sharing identical electrical specifications and base product number LP2985, with variations in packaging and product status.

Microchip Technology Alternatives: MIC5205 and MIC5207 series devices meet or exceed the core electrical requirements with enhanced performance characteristics in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Requirement: LP2985A-29DBVR is the recommended substitute from Texas Instruments, maintaining the LP2985 base product number with active product status. This part ensures long-term availability and manufacturer support while preserving electrical and mechanical compatibility.

For Enhanced Performance: MIC5205-2.9YM5-TR from Microchip Technology offers superior dropout voltage performance (0.35V vs. 0.58V) and higher PSRR (75dB at 100Hz vs. 45dB at 1kHz), making it suitable for applications requiring lower power dissipation or improved noise rejection. This part maintains active product status.

For Increased Current Capacity: MIC5207-2.9YM5-TR provides 180mA output current capability compared to the original 150mA specification, with improved dropout voltage (0.4V). This part is appropriate for designs requiring additional current headroom while maintaining the 2.9V output voltage.

For Packaging Considerations: LP2985AIM5-2.9/NOPB offers tape and reel packaging suitable for high-volume automated assembly, though it retains obsolete product status. LP2985IM5-2.9/NOPB provides identical electrical specifications with cut tape and Digi-Reel packaging options.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and the required protection features (over-current, over-temperature, short-circuit).

Frequently Asked Questions (FAQ)

Q: Can LP2985A-29DBVR directly replace LP2985A-29DBVT? A: Yes. Both parts share identical electrical specifications, output voltage (2.9V), output current (150mA), dropout voltage (0.58V @ 150mA), and SOT-23-5 packaging. The primary difference is product status: LP2985A-29DBVR is active while LP2985A-29DBVT is obsolete.

Q: What is the difference between LP2985AIM5-2.9/NOPB and LP2985A-29DBVR? A: Electrical specifications are identical. The difference lies in packaging format: LP2985AIM5-2.9/NOPB is supplied in tape and reel (TR), while LP2985A-29DBVR is available in cut tape (CT) and Digi-Reel formats. Both are Texas Instruments LP2985 base products.

Q: Why would I choose MIC5205-2.9YM5-TR over the Texas Instruments alternatives? A: MIC5205-2.9YM5-TR offers lower dropout voltage (0.35V vs. 0.58V) and higher PSRR (75dB at 100Hz), resulting in reduced power dissipation and improved noise performance. It maintains active product status and full SOT-23-5 package compatibility.

Q: Is MIC5207-2.9YM5-TR a suitable substitute if my design requires more current? A: Yes, if your application requires output current up to 180mA. MIC5207-2.9YM5-TR maintains the 2.9V output voltage and SOT-23-5 package while providing 30mA additional current capacity and improved dropout voltage (0.4V).

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts—LP2985AIM5-2.9/NOPB, LP2985A-29DBVR, LP2985IM5-2.9/NOPB, MIC5205-2.9YM5-TR, and MIC5207-2.9YM5-TR—are ROHS3 compliant with MSL Level 1 rating.

Q: What protection features are included in the substitute parts? A: All substitute parts include over-current, over-temperature, and short-circuit protection. MIC5205 and MIC5207 additionally include reverse polarity protection.

Q: Can I use these substitutes in existing PCB designs without layout modifications? A: Yes. All substitute parts use the SOT-23-5 package (SC-74A) with identical pinout and footprint compatibility, allowing direct PCB substitution without layout changes.