LP2985A-25DBVT Equivalent & Substitute Parts

Part Overview

The LP2985A-25DBVT is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed 2.5V output at 150mA with low dropout characteristics, housed in a SOT-23-5 surface mount package. The part is currently in Last Time Buy status, indicating limited availability from the original manufacturer. Finding equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring 2.5V regulation at moderate current levels.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.58V @ 150mA
Quiescent Current	95 µA
Package	SOT-23-5 (SC-74A)
Output Configuration	Positive Fixed
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature Range	-40°C to 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LP2985A-25DBVT is determined by the following critical parameters:

Output voltage specification (2.5V fixed)
Output current capability (150mA minimum)
Package type (SOT-23-5)
Input voltage rating (16V maximum)
Dropout voltage performance
Protection feature set (Over Current, Over Temperature, Short Circuit)
Operating temperature range (-40°C to 125°C)
RoHS and regulatory compliance

Substitute parts are grouped into two categories: direct parametric equivalents with identical electrical specifications, and manufacturer-recommended substitutes with enhanced current capability (250mA) that maintain full backward compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Current	Dropout Voltage	Packaging	Product Status	Inventory
LP2985A-25DBVT	Texas Instruments	150mA	0.58V @ 150mA	Cut Tape (CT)	Last Time Buy	7316 Pcs
LP2985-25DBVR	Texas Instruments	150mA	0.58V @ 150mA	Cut Tape (CT) & Digi-Reel	Active	25442 Pcs
LP2985-25DBVT	Texas Instruments	150mA	0.58V @ 150mA	Tape & Reel (TR)	Active	6600 Pcs
LP2985A-25DBVR	Texas Instruments	150mA	0.58V @ 150mA	Cut Tape (CT) & Digi-Reel	Active	17100 Pcs
LP2985AIM5-2.5/NOPB	Texas Instruments	150mA	0.58V @ 150mA	Cut Tape (CT) & Digi-Reel	Active	2965 Pcs
LP2985AIM5X-2.5/NOPB	National Semiconductor	150mA	0.58V @ 150mA	Bulk	Active	12200 Pcs
LP2985IM5-2.5	Texas Instruments	150mA	0.58V @ 150mA	Tape & Reel (TR)	Obsolete	2200 Pcs
LP2985IM5X-2.5/NOPB	Texas Instruments	150mA	0.58V @ 150mA	Tape & Reel (TR)	Active	8300 Pcs
LP2992AIM5-2.5/NOPB	Texas Instruments	250mA	0.85V @ 250mA	Cut Tape (CT) & Digi-Reel	Active	8300 Pcs
LP2992IM5-2.5/NOPB	Texas Instruments	250mA	0.85V @ 250mA	Cut Tape (CT) & Digi-Reel	Last Time Buy	1118 Pcs
LP2992IM5X-2.5/NOPB	Texas Instruments	250mA	0.85V @ 250mA	Cut Tape (CT)	Last Time Buy	3010 Pcs

Engineering Selection Recommendations

For direct replacement of the LP2985A-25DBVT with identical electrical performance, select from the parametric equivalent group: LP2985-25DBVR, LP2985-25DBVT, LP2985A-25DBVR, LP2985AIM5-2.5/NOPB, or LP2985IM5X-2.5/NOPB. All maintain 150mA output current and 0.58V dropout voltage specifications. Among these, LP2985-25DBVR and LP2985A-25DBVR offer the highest inventory levels (25442 and 17100 units respectively) and active product status, making them the preferred choices for new designs and long-term supply assurance.

For applications where higher current capability is acceptable, the LP2992 series (LP2992AIM5-2.5/NOPB, LP2992IM5-2.5/NOPB, LP2992IM5X-2.5/NOPB) provides 250mA output current while maintaining the same 2.5V output voltage and SOT-23-5 package. These parts are fully backward compatible and suitable for designs requiring additional current margin. LP2992AIM5-2.5/NOPB is recommended from this group due to active product status and adequate inventory.

All recommended substitutes maintain ROHS3 compliance, identical operating temperature range (-40°C to 125°C), and equivalent protection features (Over Current, Over Temperature, Short Circuit). Packaging format selection should align with assembly requirements: Cut Tape (CT) for manual assembly, Tape & Reel (TR) for automated pick-and-place operations, or Digi-Reel for mixed-volume production.

Frequently Asked Questions (FAQ)

Q: Can LP2992 series parts replace LP2985A-25DBVT in existing designs?

A: Yes. The LP2992 series maintains identical output voltage (2.5V), package (SOT-23-5), input voltage rating (16V), operating temperature range, and protection features. The higher current rating (250mA vs. 150mA) is a superset capability and does not affect compatibility. Designs drawing less than 150mA will operate identically to the original part.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied as individual components on carrier tape, suitable for manual assembly and small-volume production. Tape & Reel packaging provides components on continuous reel format, optimized for automated assembly equipment. Both contain identical die and electrical performance; selection depends on assembly process requirements.

Q: Why is LP2985IM5-2.5 listed as Obsolete?

A: This part has reached end-of-life status. While limited inventory remains available (2200 units), it should not be selected for new designs. Use active-status alternatives such as LP2985IM5X-2.5/NOPB or LP2985A-25DBVR instead.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes maintain ROHS3 compliance status, ensuring compatibility with environmental and regulatory requirements. Verify specific compliance documentation for your application's regional requirements.

Q: What is the significance of the "/NOPB" suffix in part numbers?

A: The "/NOPB" designation indicates "No Plumbum" (lead-free) construction, confirming ROHS3 compliance. Parts without this suffix may contain lead and require verification of compliance status for your application.

Q: Can I use LP2985AIM5X-2.5/NOPB from National Semiconductor instead of Texas Instruments?

A: Yes. This part maintains identical electrical specifications, package type, and protection features. However, verify that your design documentation and supply chain processes permit cross-manufacturer substitution, as some applications require single-source qualification.

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