LP3985IBPX-2.7 Equivalent & Substitute Parts

Part Overview

The LP3985IBPX-2.7 is a linear voltage regulator IC from Texas Instruments designed for power management applications. It delivers a fixed 2.7V output at 150mA with a maximum dropout voltage of 0.1V, making it suitable for low-power embedded systems and portable devices. The device features integrated protection against overcurrent, overtemperature, and short-circuit conditions, with an enable control feature for power sequencing.

The LP3985IBPX-2.7 is classified as obsolete. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently using this component.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.7V
Output Current	150mA
Input Voltage (Max)	6V
Dropout Voltage (Max)	0.1V @ 150mA
Quiescent Current	150 µA
Package Type	5-DSBGA (1.41x1.08)
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3985IBPX-2.7 are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

Fixed output voltage of 2.7V
Output current capability of 150mA
Maximum input voltage of 6V
Dropout voltage specification of 0.1V @ 150mA
Quiescent current of 150 µA
Package type: 5-DSBGA with specified dimensions
Operating temperature range: -40°C to 125°C
Identical protection and control features

The identified substitutes maintain full electrical equivalence across these parameters while differing in product status, packaging format, and compliance certifications.

Parameter Comparison

Parameter	LP3985IBPX-2.7	LP3985ITL-2.7/NOPB	LP3985ITLX-2.7/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor
Output Voltage	2.7V	2.7V	2.7V
Output Current	150mA	150mA	150mA
Input Voltage (Max)	6V	6V	6V
Dropout Voltage (Max)	0.1V @ 150mA	0.1V @ 150mA	0.1V @ 150mA
Quiescent Current	150 µA	150 µA	150 µA
PSRR	50dB ~ 40dB (1kHz ~ 10kHz)	50dB ~ 40dB (1kHz ~ 10kHz)	50dB ~ 40dB (1kHz ~ 10kHz)
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Control Features	Enable	Enable	Enable
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	5-DSBGA (1.41x1.08)	5-DSBGA (1.41x1.08)	5-DSBGA (1.5x1.2)
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Not specified
Packaging Format	Bulk	Tape & Reel (TR)	Bulk

Engineering Selection Recommendations

LP3985ITL-2.7/NOPB is the primary substitute for the LP3985IBPX-2.7. Both parts are manufactured by Texas Instruments with identical electrical specifications and package dimensions. The LP3985ITL-2.7/NOPB offers the advantage of active product status and ROHS3 compliance, making it suitable for new designs and applications requiring regulatory compliance. This part is available in Tape & Reel packaging format.

LP3985ITLX-2.7/NOPB is a secondary substitute manufactured by National Semiconductor. It maintains full electrical equivalence and active product status. The package dimensions differ slightly (1.5x1.2 versus 1.41x1.08), which may require PCB layout verification for space-constrained applications. This part is available in bulk packaging format.

Frequently Asked Questions (FAQ)

Q: Can LP3985ITL-2.7/NOPB be used as a direct replacement for LP3985IBPX-2.7?

A: Yes. Both parts share identical electrical specifications, output voltage, current rating, dropout voltage, and package type (5-DSBGA). The primary differences are product status (active versus obsolete) and RoHS compliance certification.

Q: What is the significance of the package dimension difference in LP3985ITLX-2.7/NOPB?

A: The LP3985ITLX-2.7/NOPB uses a 5-DSBGA package with dimensions of 1.5x1.2mm, compared to 1.41x1.08mm for the original part. This 0.09mm and 0.12mm difference in length and width may affect PCB layout in space-constrained designs. Verify footprint compatibility with your board design before implementation.

Q: Are there compliance differences between the substitute parts?

A: LP3985ITL-2.7/NOPB is ROHS3 compliant, while the original LP3985IBPX-2.7 is RoHS non-compliant. LP3985ITLX-2.7/NOPB compliance status is not specified in the provided data. For applications requiring regulatory compliance, LP3985ITL-2.7/NOPB is the appropriate selection.

Q: What packaging formats are available for these substitutes?

A: LP3985ITL-2.7/NOPB is supplied in Tape & Reel (TR) format, suitable for automated assembly. LP3985ITLX-2.7/NOPB is supplied in bulk format. Select based on your manufacturing process requirements.

Q: Do all three parts have identical protection and control features?

A: Yes. All three parts include overcurrent, overtemperature, and short-circuit protection, with enable control functionality. They operate across the same temperature range (-40°C to 125°C) and maintain identical PSRR specifications.

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