LP2985-29DBVTG4 Equivalent & Substitute Parts

Part Overview

The LP2985-29DBVTG4 is a linear voltage regulator IC from Texas Instruments, classified as a positive fixed output power management device. This SOT-23-5 surface mount component delivers 150mA at a fixed 2.9V output with a maximum input voltage of 16V. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

LP2985-29DBVTG4

Texas InstrumentsIn Stock: 1064LP2985-29DBVTG4 Datasheet

Current PartRFQ

LP2985A-29DBVR

Texas InstrumentsIn Stock: 6349LP2985A-29DBVR Datasheet

Parametric EquivalentRFQ

LP2985AIM5-2.9/NOPB

Texas InstrumentsIn Stock: 1960LP2985AIM5-2.9/NOPB 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

Substitution eligibility for the LP2985-29DBVTG4 is determined by strict alignment across the following critical parameters:

• Output voltage: 2.9V fixed
• Output current capability: minimum 150mA
• Input voltage rating: 16V maximum
• Package type: SOT-23-5 (SC-74A, SOT-753)
• Output configuration: Positive fixed
• Control features: Enable function
• Operating temperature range: -40°C to 125°C
• Mounting type: Surface mount

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications) and manufacturer-recommended alternatives (functionally compatible with minor parameter variations that do not impact circuit operation).

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments LP2985 Series (Parametric Equivalents)

LP2985A-29DBVR is the primary recommended substitute. This part maintains identical electrical specifications to the LP2985-29DBVTG4 while offering active product status from Texas Instruments. All electrical parameters, package configuration, and protection features are equivalent. This part is suitable for direct replacement in new designs and legacy system updates.

LP2985AIM5-2.9/NOPB and LP2985IM5-2.9/NOPB are parametric equivalents with identical electrical characteristics. Both parts are listed as obsolete; however, they remain available in inventory and are suitable for applications requiring exact specification matching.

Microchip Technology Alternatives (Manufacturer-Recommended)

MIC5205-2.9YM5-TR is an active product from Microchip Technology with identical output voltage and current ratings. This part features improved voltage dropout performance (0.35V versus 0.58V) and includes reverse polarity protection in addition to standard protection features. The higher quiescent current (150 µA versus 95 µA) is within acceptable tolerance for most applications. This part is recommended for new designs where improved efficiency is beneficial.

MIC5207-2.9YM5-TR is an active Microchip product with higher output current capability (180mA versus 150mA) and improved dropout voltage (0.4V). This part provides additional design margin for applications approaching the 150mA limit. The higher quiescent current (170 µA) and increased supply current specification should be evaluated for battery-powered applications.

All substitute parts maintain ROHS3 compliance and identical operating temperature ranges. Selection should prioritize active product status for long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can LP2985A-29DBVR be used as a direct replacement for LP2985-29DBVTG4?

A: Yes. LP2985A-29DBVR is a parametric equivalent with identical electrical specifications, package type, and protection features. The primary difference is active product status, making it the recommended choice for new designs and system updates.

Q: What is the difference between the Texas Instruments LP2985 variants and Microchip MIC5205/MIC5207?

A: All parts deliver 2.9V fixed output in SOT-23-5 packaging with identical input voltage ratings and operating temperature ranges. The Microchip parts feature lower dropout voltage and reverse polarity protection. MIC5207 provides higher output current (180mA). Selection depends on specific application requirements for dropout performance and current capacity.

Q: Are the Microchip alternatives pin-compatible with the original part?

A: Yes. All substitute parts use SOT-23-5 packaging (SC-74A, SOT-753) with identical pinout configuration. Physical and electrical compatibility is maintained across all listed alternatives.

Q: Why do some substitute parts have higher quiescent current specifications?

A: Quiescent current variation reflects different IC design architectures between manufacturers. The Microchip parts (MIC5205 at 150 µA, MIC5207 at 170 µA) have higher quiescent current than the Texas Instruments parts (95 µA). This difference is typically negligible in applications where load current dominates power consumption but should be evaluated for battery-powered or ultra-low-power designs.

Q: Which substitute part should be selected for new production designs?

A: LP2985A-29DBVR is recommended as the primary choice due to active product status and identical specifications. MIC5205-2.9YM5-TR is an alternative if improved dropout voltage performance is required. Both parts offer long-term availability and supply chain stability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and are suitable for applications requiring environmental compliance certification.