LP2985ITP-2.8/NOPB Equivalent & Substitute Parts

Part Overview

The LP2985ITP-2.8/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 150mA output current at a fixed 2.8V output with a maximum dropout voltage of 0.58V at full load. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

LP2985ITP-2.8/NOPB

Texas InstrumentsIn Stock: 889LP2985ITP-2.8/NOPB Datasheet

Current PartRFQ

LP2985IM5-2.8/NOPB

Texas InstrumentsIn Stock: 3455LP2985IM5-2.8/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP2985ITP-2.8/NOPB is determined by strict equivalence across the following electrical and mechanical parameters:

• Fixed output voltage of 2.8V
• Maximum input voltage of 16V
• Output current capability of 150mA
• Maximum dropout voltage of 0.58V at 150mA
• Quiescent current of 95 µA
• Enable control feature
• Over current, over temperature, and short circuit protection
• Operating temperature range of -40°C to 125°C
• ROHS3 compliance and REACH unaffected status

The LP2985IM5-2.8/NOPB qualifies as a direct substitute based on identical electrical specifications. The primary difference is the package type: the substitute uses SOT-23-5 (SC-74A) surface mount packaging instead of the 5-DSBGA package of the original part. Both parts share the same base product number (LP2985) and are manufactured by Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

The LP2985IM5-2.8/NOPB is the recommended substitute for the obsolete LP2985ITP-2.8/NOPB. Both parts maintain identical electrical performance specifications and regulatory compliance status. The substitute part carries active product status from Texas Instruments, ensuring continued availability and manufacturing support.

The primary design consideration is the package transition from 5-DSBGA to SOT-23-5. This change requires PCB layout modification to accommodate the different pin configuration and footprint geometry. Both packages are surface mount technologies suitable for automated assembly processes.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for industrial and commercial applications.

Frequently Asked Questions (FAQ)

Q: Can the LP2985IM5-2.8/NOPB directly replace the LP2985ITP-2.8/NOPB without circuit modification?

A: Electrical substitution is direct. However, PCB layout modification is required due to package differences. The 5-DSBGA package uses a different pin arrangement and footprint than the SOT-23-5 package. Pin-to-pin functionality is equivalent, but physical placement and routing must be redesigned.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution is based on fixed output voltage (2.8V), input voltage rating (16V maximum), output current (150mA), dropout voltage (0.58V @ 150mA), quiescent current (95 µA), control features (Enable), and protection features (Over Current, Over Temperature, Short Circuit).

Q: Are there inventory or lead time advantages to using the substitute part?

A: The LP2985IM5-2.8/NOPB carries active product status with higher inventory availability (3400 pcs) compared to the obsolete original part (873 pcs). Active status typically provides better long-term procurement reliability.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is identical at MSL 1 (Unlimited). Both carry the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Q: What is the primary difference between the two packages?

A: The original uses 5-DSBGA (5-pin Die Size Ball Grid Array), while the substitute uses SOT-23-5 (5-pin Small Outline Transistor). SOT-23-5 is a more widely used package in standard manufacturing environments and offers easier hand-soldering capability if required for prototyping or rework.