LP3986TL-3333/NOPB Equivalent & Substitute Parts

Part Overview

The LP3986TL-3333/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications with dual output capability at 150mA per channel. This device is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement continuity. The part operates across industrial temperature ranges (-40°C to 125°C) and includes integrated protection features for over-current, over-temperature, and short-circuit conditions.

Substiute Parts

LP3986TL-3333/NOPB

Texas InstrumentsIn Stock: 1004LP3986TL-3333/NOPB Datasheet

Current PartRFQ

MIC5310-SSYML-TR

Microchip TechnologyIn Stock: 921MIC5310-SSYML-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP3986TL-3333/NOPB is determined by the following critical parameters:

• Output Configuration & Type: Both main and substitute parts must provide positive fixed voltage output
• Dual Output Capability: Both regulators must support 2 independent output channels
• Fixed Output Voltage: 3.3V output requirement must be met
• Current Rating: Minimum 150mA per channel output current capability
• Voltage Dropout: Maximum 0.1V @ 150mA specification
• Operating Temperature Range: -40°C to 125°C industrial range
• Surface Mount Packaging: Compatible with PCB assembly processes
• Protection Features: Over-current, over-temperature, and short-circuit protection required
• Regulatory Compliance: RoHS3 compliance and REACH unaffected status

The MIC5310-SSYML-TR from Microchip Technology meets all substitution criteria as an active product with equivalent electrical specifications and compatible packaging footprint.

Parameter Comparison

Engineering Selection Recommendations

The MIC5310-SSYML-TR is a direct functional substitute for the obsolete LP3986TL-3333/NOPB. Key selection factors include:

Product Status: The MIC5310-SSYML-TR carries active product status with ongoing manufacturer support and availability, addressing the obsolescence of the original part.

Electrical Equivalence: Both devices provide dual 3.3V regulated outputs at 150mA per channel with identical dropout voltage specifications and matching operating temperature ranges.

Compliance & Certifications: Both parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for existing designs.

Performance Advantages: The MIC5310-SSYML-TR demonstrates improved quiescent current (120 µA vs. 130 µA) and superior power supply rejection ratio (70dB ~ 65dB across 1kHz ~ 20kHz vs. 60dB ~ 50dB across 1kHz ~ 10kHz).

Input Voltage Consideration: The substitute part specifies a maximum input voltage of 5.5V compared to 6V for the original. Design input voltage must not exceed 5.5V for compatibility.

Package Footprint: The 8-MLF® (2x2) package of the substitute differs from the 8-DSBGA (1.56x1.56) footprint of the original. PCB layout modification is required for physical placement.

Frequently Asked Questions (FAQ)

Q: Can the MIC5310-SSYML-TR directly replace the LP3986TL-3333/NOPB without design changes?

A: Electrical substitution is direct for applications with input voltage ≤5.5V. Physical PCB layout modification is required due to different package footprints (8-MLF® vs. 8-DSBGA).

Q: What is the maximum input voltage for the MIC5310-SSYML-TR?

A: The maximum input voltage is 5.5V. If your design requires 6V input capability, the substitute part is not compatible.

Q: Are both output channels of the MIC5310-SSYML-TR independently regulated?

A: Yes, the MIC5310-SSYML-TR provides two independent 3.3V regulated outputs, each capable of 150mA output current.

Q: Does the MIC5310-SSYML-TR include short-circuit protection?

A: The MIC5310-SSYML-TR includes over-current and over-temperature protection. The original LP3986TL-3333/NOPB explicitly lists short-circuit protection; verify specific short-circuit handling requirements with the Microchip datasheet.

Q: What is the package compatibility consideration?

A: The LP3986TL-3333/NOPB uses 8-DSBGA (1.56x1.56) packaging, while the MIC5310-SSYML-TR uses 8-MLF® (2x2) packaging. These are different footprints requiring PCB redesign for component placement and routing.

Q: Are both parts RoHS3 compliant?

A: Yes, both the LP3986TL-3333/NOPB and MIC5310-SSYML-TR are RoHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the quiescent current difference between these parts?

A: The LP3986TL-3333/NOPB has a quiescent current of 130 µA, while the MIC5310-SSYML-TR operates at 120 µA, representing a 7.7% reduction in standby power consumption.