LP3985IBPX-3.1/NOPB Equivalent & Substitute Parts

Part Overview

The LP3985IBPX-3.1/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 3.1V output at 150mA with integrated protection features including over-current, over-temperature, and short-circuit protection. The part is currently obsolete, making identification of active equivalent alternatives essential for ongoing production support and design continuity.

Substiute Parts

LP3985IBPX-3.1/NOPB

Texas InstrumentsIn Stock: 935LP3985IBPX-3.1/NOPB Datasheet

Current PartRFQ

LP3985ITL-3.1/NOPB

Texas InstrumentsIn Stock: 2354LP3985ITL-3.1/NOPB Datasheet

Parametric EquivalentRFQ

LP3985ITLX-3.1/NOPB

Texas InstrumentsIn Stock: 3377LP3985ITLX-3.1/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3985IBPX-3.1/NOPB are identified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

• Fixed output voltage of 3.1V
• Output current rating of 150mA
• Maximum input voltage of 6V
• Voltage dropout of 0.1V @ 150mA
• Quiescent current of 150 µA
• 5-DSBGA package (1.41x1.08)
• Operating temperature range of -40°C ~ 125°C
• Identical protection features (Over Current, Over Temperature, Short Circuit)
• Enable control feature
• ROHS3 compliance

The two identified substitutes—LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB—match all electrical specifications and package requirements. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

Both LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB are direct functional equivalents to the obsolete LP3985IBPX-3.1/NOPB. Selection between the two active alternatives should be based on:

Product Status: Both substitute parts carry Active product status, ensuring long-term availability and manufacturing support compared to the Obsolete main part.

Compliance & Certifications: All three parts maintain ROHS3 compliance, REACH Unaffected status, and identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, supporting regulatory and supply chain requirements.

Packaging Consideration: The primary difference between LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB is packaging format. Both are supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Inventory availability should guide final selection.

Frequently Asked Questions (FAQ)

Q: Can LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB be used interchangeably with LP3985IBPX-3.1/NOPB?

A: Yes. All three parts share identical electrical specifications, output voltage (3.1V), output current (150mA), package type (5-DSBGA), and protection features. The substitute parts are parametric equivalents suitable for direct replacement.

Q: Why is the main part marked as Obsolete?

A: The LP3985IBPX-3.1/NOPB is classified as Obsolete by Texas Instruments. The active alternatives LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB provide continued access to this functionality with guaranteed long-term support.

Q: What is the difference between LP3985ITL-3.1/NOPB and LP3985ITLX-3.1/NOPB?

A: Both parts are electrically identical with matching specifications. The designation difference reflects internal Texas Instruments product line management. Both are supplied in Tape & Reel format and carry Active product status.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 5-DSBGA package with dimensions of 1.41x1.08mm, ensuring PCB layout and footprint compatibility.

Q: Do these parts meet RoHS and REACH requirements?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting environmental and regulatory standards for electronic component manufacturing and distribution.