LP3985IBL-2.5 Equivalent & Substitute Parts

Part Overview

The LP3985IBL-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output at 150mA in a 5-DSBGA package. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing. The device provides regulated power management with integrated protection features including over-current, over-temperature, and short-circuit protection across an operating temperature range of -40°C to 125°C.

Substiute Parts

LP3985IBL-2.5

Texas InstrumentsIn Stock: 749LP3985IBL-2.5 Datasheet

Current PartRFQ

LP3985ITL-2.5/NOPB

Texas InstrumentsIn Stock: 1700LP3985ITL-2.5/NOPB Datasheet

DirectRFQ

TPS79901YZUR

Texas InstrumentsIn Stock: 15677TPS79901YZUR Datasheet

DirectRFQ

LP3985ITLX-2.5/NOPB

Texas InstrumentsIn Stock: 3492LP3985ITLX-2.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3985IBL-2.5 are classified based on electrical and mechanical compatibility within the allowed parameters for linear voltage regulators in this category.

Direct Substitutes maintain identical electrical specifications: fixed 2.5V output, 150mA current capacity, 0.1V maximum dropout voltage, 6V maximum input voltage, and 5-DSBGA package compatibility. These parts are pin-compatible and functionally equivalent with no design modifications required.

Parametric Equivalents share the same core electrical characteristics but may differ in packaging designation or product status. These parts deliver identical performance in the application circuit.

Functional Alternatives provide similar voltage regulation capability but with different output configurations or current ratings. These require evaluation for specific application requirements.

The key parameters determining substitution eligibility are: output voltage (2.5V fixed), output current (150mA), input voltage rating (6V maximum), dropout voltage specification (0.1V @ 150mA), package type (5-DSBGA), and control/protection features (Enable, Over Current, Over Temperature, Short Circuit).

Parameter Comparison

Engineering Selection Recommendations

LP3985ITL-2.5/NOPB is the primary direct substitute for LP3985IBL-2.5. Both parts deliver identical electrical performance with fixed 2.5V output, 150mA current capacity, and 0.1V dropout voltage. The LP3985ITL-2.5/NOPB is currently in active production status with higher inventory availability (1683 pcs), ensuring supply continuity. Packaging is specified as Tape & Reel (TR) versus the original part's unspecified packaging. This part is ROHS3 compliant and MSL Level 1, meeting all compliance requirements.

LP3985ITLX-2.5/NOPB is a parametric equivalent offering identical electrical specifications and package type. This variant is also in active production with substantial inventory (3447 pcs). The ITLX designation indicates a different product line variant while maintaining full electrical compatibility. This part is recommended when the ITLX variant is preferred by supply chain or design specifications.

TPS79901YZUR is a functional alternative with different electrical characteristics. While it maintains the same 5-DSBGA package and operating temperature range, it features adjustable output voltage (1.2V to 6.5V), higher output current (200mA), and lower quiescent current (60 µA). This part is suitable only if the application can accommodate adjustable output voltage and does not require the fixed 2.5V specification. The TPS79901YZUR requires external resistors for voltage setting and is not a direct pin-for-pin replacement.

Selection priority: LP3985ITL-2.5/NOPB for direct replacement; LP3985ITLX-2.5/NOPB as secondary option; TPS79901YZUR only if adjustable output voltage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can LP3985ITL-2.5/NOPB directly replace LP3985IBL-2.5 without circuit modifications?

A: Yes. Both parts are pin-compatible with identical electrical specifications: 2.5V fixed output, 150mA current capacity, 0.1V dropout voltage, and 5-DSBGA package. No circuit modifications are required for direct substitution.

Q: What is the difference between LP3985ITL-2.5/NOPB and LP3985ITLX-2.5/NOPB?

A: Both parts deliver identical electrical performance and package specifications. The difference lies in the product line variant designation (ITL versus ITLX). Both are active production parts suitable for new designs and production continuity. Selection between them depends on supply chain availability and design documentation requirements.

Q: Can TPS79901YZUR be used as a direct replacement?

A: No. While TPS79901YZUR shares the same 5-DSBGA package and operating temperature range, it features adjustable output voltage (1.2V to 6.5V) instead of fixed 2.5V output. This part requires external resistors for voltage configuration and is not pin-compatible. Use TPS79901YZUR only if the application design can accommodate adjustable output voltage.

Q: What packaging options are available for substitute parts?

A: LP3985ITL-2.5/NOPB is supplied in Tape & Reel (TR) packaging. LP3985ITLX-2.5/NOPB is also supplied in Tape & Reel (TR) packaging. TPS79901YZUR is supplied in Cut Tape (CT) & Digi-Reel® packaging. All parts use the same 5-DSBGA component package for PCB mounting.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. LP3985ITL-2.5/NOPB, LP3985ITLX-2.5/NOPB, and TPS79901YZUR are all ROHS3 compliant and REACH unaffected. All parts have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements.

Q: Which substitute part has the best inventory availability?

A: TPS79901YZUR has the highest inventory (15611 pcs). LP3985ITLX-2.5/NOPB has 3447 pcs in stock. LP3985ITL-2.5/NOPB has 1683 pcs available. Inventory levels should be verified with your supplier for current availability.