LP3986TL-2818/NOPB Equivalent & Substitute Parts

Part Overview

The LP3986TL-2818/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed dual-output applications. This device provides 2.8V and 1.8V outputs with 150mA current capability in an 8-DSBGA package. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and new production requirements where legacy compatibility is not mandatory.

Substiute Parts

LP3986TL-2818/NOPB

Texas InstrumentsIn Stock: 1113LP3986TL-2818/NOPB Datasheet

Current PartRFQ

MIC5310-MGYML-TR

Microchip TechnologyIn Stock: 1028MIC5310-MGYML-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3986TL-2818/NOPB is determined by the following critical parameters:

• Dual Output Configuration: Both main and substitute parts must provide exactly 2 independent regulated outputs
• Fixed Output Voltages: 2.8V and 1.8V outputs must be maintained
• Current Capability: Minimum 150mA per output channel
• Maximum Input Voltage: Must support up to 6V input (substitute allows 5.5V, which is acceptable for most 5V-based systems)
• Dropout Voltage: Maximum 0.1V @ 150mA specification
• Operating Temperature Range: -40°C ~ 125°C
• Surface Mount Packaging: Both BGA and MLF packages are surface-mount compatible
• Regulatory Compliance: ROHS3 compliance and MSL Level 1 rating

The MIC5310-MGYML-TR from Microchip Technology meets all substitution criteria while offering active product status and improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MIC5310-MGYML-TR is a qualified substitute for the obsolete LP3986TL-2818/NOPB based on the following engineering criteria:

Functional Equivalence: Both devices provide identical dual-output voltage regulation (2.8V and 1.8V) with matching current capacity and dropout specifications across the full operating temperature range.

Regulatory Compliance: Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards.

Active Product Status: The MIC5310-MGYML-TR is an active product with ongoing manufacturer support, eliminating supply chain risk associated with the obsolete LP3986TL-2818/NOPB.

Performance Enhancement: The substitute demonstrates improved quiescent current (120 µA vs. 130 µA), lower maximum supply current (190 µA vs. 320 µA), and superior PSRR performance (70dB ~ 65dB vs. 60dB ~ 50dB), resulting in better power efficiency and noise rejection.

Input Voltage Consideration: The MIC5310-MGYML-TR maximum input voltage rating of 5.5V is suitable for systems operating at 5V nominal input. Applications requiring the full 6V input capability of the original part must verify system input voltage specifications before substitution.

Package Transition: PCB layout modification is required due to package change from 8-DSBGA (1.56x1.56) to 8-MLF® (2x2). Both packages are surface-mount compatible with standard reflow assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the MIC5310-MGYML-TR directly replace the LP3986TL-2818/NOPB without PCB modification?

A: No. The package change from 8-DSBGA to 8-MLF® requires PCB layout redesign. Pin assignments must be verified against both datasheets, and the footprint must be updated accordingly. The electrical functionality is equivalent, but physical placement differs.

Q: What is the impact of the 5.5V maximum input voltage on the MIC5310-MGYML-TR compared to the 6V rating of the original part?

A: The 5.5V limit is suitable for standard 5V supply systems with typical voltage tolerance. Applications with input voltages exceeding 5.5V require verification that the system design does not depend on the 6V maximum rating. Most industrial and consumer applications operate within 5V ±5% specifications.

Q: Are both parts pin-compatible?

A: No. The different package types (8-DSBGA vs. 8-MLF®) result in different pin configurations and physical layouts. A complete PCB redesign is necessary for substitution.

Q: Do both parts support the same control features?

A: Both devices include Enable control features. The MIC5310-MGYML-TR omits Short Circuit protection listed in the original part; however, Over Current and Over Temperature protection are present in both devices.

Q: What is the inventory status for substitution planning?

A: The LP3986TL-2818/NOPB has 1041 pieces in stock as new original inventory. The MIC5310-MGYML-TR has 1015 pieces available. Both parts are currently available for procurement.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. ECCN and HTSUS classifications are identical (EAR99 and 8542.39.0001 respectively), indicating no regulatory differentiation for export or tariff purposes.