LP2985ITPX-3.0/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985ITPX-3.0/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output applications with 150mA current capacity. This device is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across a wide temperature range (-40°C to 125°C) and includes integrated protection features for over-current, over-temperature, and short-circuit conditions.

Substiute Parts

LP2985ITPX-3.0/NOPB

Texas InstrumentsIn Stock: 38944LP2985ITPX-3.0/NOPB Datasheet

Current PartRFQ

LP2985IM5X-3.0/NOPB

Texas InstrumentsIn Stock: 3331LP2985IM5X-3.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2985ITPX-3.0/NOPB is determined by strict equivalence across the following critical parameters:

• Output voltage: 3V fixed
• Output current capacity: 150mA
• Input voltage maximum: 16V
• Dropout voltage: 0.58V @ 150mA
• Quiescent current: 95 µA
• Protection features: Over-current, over-temperature, short-circuit
• Operating temperature range: -40°C to 125°C
• Control features: Enable function
• Compliance: ROHS3 compliant

The LP2985IM5X-3.0/NOPB meets all these electrical specifications. The primary difference is the package type: the original part uses 5-DSBGA (5-pin Ultra Fine Ball Grid Array), while the substitute uses SOT-23-5 (5-pin Small Outline Transistor). Both packages are surface-mount configurations with identical pin functionality and electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The LP2985IM5X-3.0/NOPB is the direct substitute for the obsolete LP2985ITPX-3.0/NOPB. Both parts are manufactured by Texas Instruments and share identical electrical specifications across all critical parameters. The substitute part carries Active product status, ensuring long-term availability and supply chain continuity.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), meeting the same regulatory and environmental requirements. The electrical performance is equivalent, with matching output voltage, current capacity, dropout voltage, quiescent current, and protection features.

The primary design consideration is package compatibility. The original 5-DSBGA package must be replaced with the SOT-23-5 package in the substitute part. This requires PCB layout modification to accommodate the different footprint and pin spacing. Both packages are industry-standard surface-mount configurations with established manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the LP2985IM5X-3.0/NOPB directly replace the LP2985ITPX-3.0/NOPB without circuit modifications?

A: Electrical substitution is direct. Pin functionality and electrical specifications are identical. PCB layout modification is required due to different package types (5-DSBGA to SOT-23-5).

Q: What is the difference between the 5-DSBGA and SOT-23-5 packages?

A: 5-DSBGA is an ultra-fine ball grid array package with smaller footprint and pitch. SOT-23-5 is a standard small-outline transistor package with larger dimensions and wider pin spacing. Both are surface-mount configurations with identical electrical performance.

Q: Why is the original part obsolete?

A: Product obsolescence is determined by the manufacturer. The LP2985IM5X-3.0/NOPB substitute maintains Active status and provides equivalent functionality for new designs and ongoing production.

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

A: Both parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity). Regulatory and environmental compliance is equivalent.

Q: What are the key parameters that determine substitution eligibility?

A: Output voltage (3V), output current (150mA), input voltage maximum (16V), dropout voltage (0.58V @ 150mA), quiescent current (95 µA), protection features, operating temperature range (-40°C to 125°C), and control features (Enable) must all match for direct substitution.