LP2985AIM5-6.1 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2985AIM5-6.1 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 150mA output current with a fixed 6.1V output and operates across an input voltage range up to 16V. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability or compliance status.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	6.1V
Output Current	150mA
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.58V @ 150mA
Quiescent Current	95 µA
Package Type	SOT-23-5 (SC-74A)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitution eligibility for the LP2985AIM5-6.1 is determined by strict equivalence across the following parameters:

Output voltage: 6.1V fixed
Output current capability: 150mA
Input voltage rating: 16V maximum
Dropout voltage: 0.58V @ 150mA
Package: SOT-23-5
Quiescent current: 95 µA
Protection features: Over Current, Over Temperature, Short Circuit
Control features: Enable function
Operating temperature range: -40°C to 125°C

All identified substitute parts maintain these specifications without deviation. Substitution is based on parametric equivalence and package compatibility, not on product status or compliance improvements.

Parameter Comparison

Parameter	LP2985AIM5-6.1	LP2985AIM5-6.1/NOPB	LP2985AIM5X-6.1/NOPB	LP2985IM5-6.1/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	6.1V	6.1V	6.1V	6.1V
Output Current	150mA	150mA	150mA	150mA
Input Voltage (Max)	16V	16V	16V	16V
Dropout Voltage (Max)	0.58V @ 150mA	0.58V @ 150mA	0.58V @ 150mA	0.58V @ 150mA
Quiescent Current	95 µA	95 µA	95 µA	95 µA
PSRR	45dB (1kHz)	45dB (1kHz)	45dB (1kHz)	45dB (1kHz)
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Product Status	Obsolete	Obsolete	Active	Obsolete
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Inventory Availability	899 Pcs	9698 Pcs	3317 Pcs	5522 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain complete parametric equivalence to the LP2985AIM5-6.1. Selection among substitutes should be based on the following factors:

Product Status Consideration: LP2985AIM5X-6.1/NOPB is the only active product in this group. For new designs or long-term production requirements, this part provides ongoing manufacturer support and supply continuity.

Compliance Status: LP2985AIM5-6.1/NOPB, LP2985AIM5X-6.1/NOPB, and LP2985IM5-6.1/NOPB are all ROHS3 compliant, whereas the original LP2985AIM5-6.1 is non-compliant. Compliance-regulated applications require selection from the ROHS3 compliant alternatives.

Packaging Format: The original part is supplied in bulk packaging. All substitute parts are supplied in Tape & Reel format, which is standard for automated assembly processes. Bulk-to-tape conversion may be required for legacy procurement workflows.

Inventory Availability: LP2985AIM5-6.1/NOPB offers the highest stock level at 9698 pieces, followed by LP2985IM5-6.1/NOPB at 5522 pieces and LP2985AIM5X-6.1/NOPB at 3317 pieces.

Frequently Asked Questions (FAQ)

Q: Can LP2985AIM5-6.1/NOPB be used as a direct replacement for LP2985AIM5-6.1?

A: Yes. Both parts are parametrically identical across all electrical specifications including output voltage, current rating, dropout voltage, and protection features. The primary differences are packaging format (Tape & Reel vs. bulk) and RoHS compliance status (ROHS3 vs. non-compliant).

Q: What is the difference between LP2985AIM5X-6.1/NOPB and LP2985IM5-6.1/NOPB?

A: Both parts are parametrically equivalent. The key distinction is product status: LP2985AIM5X-6.1/NOPB is active, while LP2985IM5-6.1/NOPB is obsolete. For new designs, the active part is preferred for supply assurance.

Q: Are all substitute parts available in SOT-23-5 packaging?

A: Yes. All substitute parts use the SOT-23-5 package (SC-74A designation), ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: Do the substitute parts support the Enable control feature?

A: Yes. All substitute parts include the Enable control feature, maintaining functional equivalence with the original LP2985AIM5-6.1.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates lead-free (Pb-free) manufacturing, which is associated with ROHS3 compliance. Parts without this suffix may contain lead.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design accommodates Tape & Reel packaging format. Electrical performance and thermal characteristics are identical across all substitute parts.

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