LP2985AIM5X-2.5 Equivalent & Substitute Parts

Part Overview

The LP2985AIM5X-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. This device delivers a fixed positive 2.5V output at 150mA with a maximum dropout voltage of 0.58V at rated current. The part is currently listed as Obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

The LP2985AIM5X-2.5 operates across an input voltage range up to 16V and includes integrated protection features for overcurrent, overtemperature, and short circuit conditions. Its SOT-23-5 surface mount package and low quiescent current of 95µA make it suitable for battery-powered and space-constrained applications.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.5V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.58V @ 150mA
Quiescent Current	95µA
PSRR	45dB (1kHz)
Package	SOT-23-5 (SC-74A)
Operating Temperature	-40°C to 125°C
Protection Features	Overcurrent, Overtemperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP2985AIM5X-2.5 are classified based on electrical and mechanical parameter compatibility. All listed substitutes maintain identical output voltage (2.5V), output current (150mA), input voltage rating (16V maximum), dropout voltage specification (0.58V @ 150mA), quiescent current (95µA), PSRR (45dB at 1kHz), package type (SOT-23-5), and operating temperature range (-40°C to 125°C).

The substitution logic is based on these critical parameters:

Fixed output voltage of 2.5V
150mA output current capability
Maximum dropout voltage of 0.58V at rated current
SOT-23-5 package compatibility
Identical control and protection feature sets

Parts are further differentiated by product status (Active, Obsolete, Last Time Buy), RoHS compliance status, and packaging format (Cut Tape, Tape & Reel, Bulk).

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package	Product Status	RoHS Status
LP2985AIM5X-2.5	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Obsolete	Non-compliant
LP2985AIM5X-2.5/NOPB	National Semiconductor	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	Not specified
LP2985-25DBVR	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LP2985-25DBVT	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LP2985A-25DBVR	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LP2985A-25DBVT	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Last Time Buy	ROHS3 Compliant
LP2985AIM5-2.5/NOPB	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LP2985IM5-2.5	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Obsolete	ROHS3 Compliant
LP2985IM5-2.5/NOPB	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LP2985IM5X-2.5/NOPB	Texas Instruments	2.5V	150mA	0.58V @ 150mA	95µA	SOT-23-5	Active	ROHS3 Compliant
LD2985BM25R	STMicroelectronics	2.5V	150mA	0.575V @ 150mA	150µA	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For new designs and production continuity, Active status parts are preferred. Texas Instruments offers multiple Active alternatives within the LP2985 family: LP2985-25DBVR, LP2985-25DBVT, LP2985A-25DBVR, LP2985AIM5-2.5/NOPB, LP2985IM5-2.5/NOPB, and LP2985IM5X-2.5/NOPB. All Texas Instruments alternatives are ROHS3 compliant.

The STMicroelectronics LD2985BM25R provides an alternative from a different manufacturer with Active status and ROHS3 compliance. This part exhibits a slightly lower quiescent current specification (150µA versus 95µA) and marginally lower dropout voltage (0.575V versus 0.58V), both within acceptable tolerance for most applications.

Parts designated as Last Time Buy (LP2985A-25DBVT) or Obsolete (LP2985IM5-2.5) should be avoided for new designs. The LP2985AIM5X-2.5/NOPB from National Semiconductor is listed as Active but lacks specified RoHS compliance documentation.

Packaging format selection (Cut Tape, Tape & Reel, Bulk) depends on procurement and assembly requirements and does not affect electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LP2985-25DBVR replace LP2985AIM5X-2.5 directly?

A: Yes. Both parts share identical electrical specifications: 2.5V fixed output, 150mA output current, 0.58V maximum dropout voltage at rated current, 95µA quiescent current, and SOT-23-5 package. The primary difference is product status (Active versus Obsolete) and RoHS compliance (ROHS3 Compliant versus Non-compliant).

Q: What is the difference between LP2985-25DBVR and LP2985-25DBVT?

A: Both parts are electrically identical. The difference is packaging format: DBVR indicates Cut Tape & Digi-Reel format, while DBVT indicates Tape & Reel format. Selection depends on procurement and assembly line requirements.

Q: Is LD2985BM25R from STMicroelectronics a suitable substitute?

A: Yes, with minor parameter variations. The LD2985BM25R maintains the same 2.5V output, 150mA current, SOT-23-5 package, and operating temperature range. The quiescent current is specified at 150µA (versus 95µA) and dropout voltage at 0.575V (versus 0.58V). These differences are within acceptable tolerance for most applications and do not affect functional compatibility.

Q: Why is LP2985AIM5X-2.5 marked as Obsolete?

A: The original part is no longer in active production. Multiple Active alternatives from Texas Instruments with identical electrical specifications are available for design migration.

Q: Should I use parts marked as Last Time Buy?

A: Parts designated Last Time Buy (such as LP2985A-25DBVT) have limited remaining inventory and are approaching end-of-life. For new designs, select from Active status alternatives to ensure long-term supply availability.

Q: Are all substitute parts ROHS3 compliant?

A: Most Texas Instruments alternatives (LP2985-25DBVR, LP2985-25DBVT, LP2985A-25DBVR, LP2985A-25DBVT, LP2985AIM5-2.5/NOPB, LP2985IM5-2.5/NOPB, LP2985IM5X-2.5/NOPB) and the STMicroelectronics LD2985BM25R are ROHS3 compliant. The LP2985AIM5X-2.5/NOPB from National Semiconductor does not specify RoHS compliance status.

Q: Can I mix different substitute parts in the same production batch?

A: All listed substitutes are electrically and mechanically compatible. However, mixing parts from different manufacturers or product status categories may complicate supply chain management and traceability documentation. Standardizing on a single Active part number is recommended for production consistency.

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