LP2985IM5-5.0 Equivalent & Substitute Parts

Part Overview

The LP2985IM5-5.0 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 5V output at 150mA in a SOT-23-5 surface mount package. The device features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

The LP2985IM5-5.0 carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this part number. This status necessitates identification of equivalent and substitute parts to ensure design continuity and supply chain reliability for applications currently using this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	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
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature Range	-40°C to 125°C
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the LP2985IM5-5.0 is determined by the following critical parameters:

Fixed output voltage of 5V
Output current capability of 150mA
Maximum input voltage of 16V
Dropout voltage specification of 0.58V @ 150mA
SOT-23-5 package compatibility
Enable control feature
Protection features (overcurrent, overtemperature, short circuit)
Operating temperature range of -40°C to 125°C

Substitute parts are grouped into two categories:

Texas Instruments LP2985 Series (Direct Equivalents): Parts sharing the same base product number (LP2985) with identical electrical specifications and package. These include variants with different temperature grades (standard vs. A-grade) and packaging options (cut tape vs. tape & reel).

STMicroelectronics LD2985BM50R (Parametric Equivalent): An alternative manufacturer part with matching output voltage, current rating, package, and operating temperature range. Minor variations exist in quiescent current (150 µA vs. 95 µA) and supply current specifications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package	Product Status	RoHS Status
LP2985IM5-5.0	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Last Time Buy	ROHS3 Compliant
LP2985IM5-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985-50DBVR	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985-50DBVT	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985A-50DBVR	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985A-50DBVT	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985AIM5-5.0	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Last Time Buy	RoHS non-compliant
LP2985AIM5-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985AIM5X-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LP2985IM5X-5.0/NOPB	Texas Instruments	5V	150mA	0.58V @ 150mA	95 µA	SOT-23-5	Active	ROHS3 Compliant
LD2985BM50R	STMicroelectronics	5V	150mA	0.575V @ 150mA	150 µA	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the LP2985IM5-5.0, the following selection criteria apply based on product status and compliance requirements:

Primary Recommendation: LP2985IM5-5.0/NOPB or LP2985IM5X-5.0/NOPB are direct functional equivalents with Active product status from Texas Instruments. Both maintain identical electrical specifications and ROHS3 compliance. The /NOPB designation indicates lead-free, halogen-free processing. LP2985IM5X-5.0/NOPB offers extended tape & reel packaging availability (27,990 pcs in stock).

Alternative Texas Instruments Options: LP2985A-50DBVR and LP2985A-50DBVT represent the A-grade temperature variant with Active status and superior inventory levels (80,100 and 9,800 pcs respectively). These maintain all electrical parameters and ROHS3 compliance.

Cross-Manufacturer Alternative: LD2985BM50R from STMicroelectronics provides parametric equivalence with Active status and ROHS3 compliance. This part exhibits slightly higher quiescent current (150 µA vs. 95 µA) and marginally lower dropout voltage (0.575V vs. 0.58V), both within acceptable tolerance for most applications.

Avoid: LP2985AIM5-5.0 carries Last Time Buy status and RoHS non-compliant designation, making it unsuitable for new designs or long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can LP2985IM5-5.0 be directly replaced with LP2985IM5-5.0/NOPB?

A: Yes. Both parts share identical electrical specifications, output voltage, current rating, dropout voltage, and SOT-23-5 package. The /NOPB designation indicates lead-free processing and does not affect functional compatibility. LP2985IM5-5.0/NOPB is the recommended direct replacement due to Active product status.

Q: What is the difference between LP2985 and LP2985A variants?

A: Both variants maintain identical electrical specifications and package. The A-grade designation indicates enhanced temperature performance characteristics. For the specified -40°C to 125°C operating range, both are functionally equivalent.

Q: Are LP2985-50DBVR and LP2985-50DBVT interchangeable?

A: Yes. Both parts are parametric equivalents with identical electrical specifications and SOT-23-5 packaging. The suffix designates different packaging formats (reel type), not electrical performance.

Q: Can LD2985BM50R from STMicroelectronics replace the LP2985IM5-5.0?

A: Yes, with minor parameter variations. The LD2985BM50R delivers the same 5V output at 150mA in SOT-23-5 package with matching operating temperature range. Quiescent current is 150 µA (vs. 95 µA) and dropout voltage is 0.575V (vs. 0.58V). These differences are within acceptable tolerance for most applications but should be verified against specific circuit requirements.

Q: What does the /NOPB suffix indicate?

A: /NOPB designates lead-free, halogen-free (Pb-free) processing compliant with RoHS directives. This is a manufacturing process designation and does not affect electrical performance or package compatibility.

Q: Why is LP2985AIM5-5.0 not recommended as a substitute?

A: LP2985AIM5-5.0 carries Last Time Buy status and RoHS non-compliant designation. While electrically equivalent, its discontinued status and non-compliance with modern environmental standards make it unsuitable for new designs or applications requiring long-term supply assurance.

Q: Which substitute part has the highest inventory availability?

A: LP2985A-50DBVR maintains the highest inventory level at 80,100 pcs in stock, followed by LP2985AIM5X-5.0/NOPB at 27,990 pcs and LP2985IM5X-5.0/NOPB at 26,400 pcs.

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