LP3985IBP-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP3985IBP-3.3/NOPB is a linear voltage regulator IC from Texas Instruments designed for power management applications. This device delivers a fixed 3.3V output at 150mA with a maximum dropout voltage of 0.1V, making it suitable for low-power embedded systems and portable applications. The part is classified as Obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	3.3V
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
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP3985IBP-3.3/NOPB are qualified based on the following electrical and mechanical parameters:

Fixed output voltage of 3.3V
Output current capability of 150mA
Maximum input voltage of 6V
Dropout voltage specification of 0.1V @ 150mA
Quiescent current of 150 µA
Identical protection features (Over Current, Over Temperature, Short Circuit)
Enable control feature
Operating temperature range of -40°C to 125°C
Surface mount mounting type
5-DSBGA package configuration
ROHS3 compliance

The LP3985IBP-3.3/NOPB has two qualified substitutes: LP3985ITL-3.3/NOPB (MFR Recommended) and LP3985ITLX-3.3/NOPB (Parametric Equivalent). Both maintain identical electrical specifications and functional characteristics.

Parameter Comparison

Parameter	LP3985IBP-3.3/NOPB	LP3985ITL-3.3/NOPB	LP3985ITLX-3.3/NOPB
Manufacturer	Texas Instruments	Texas Instruments	National Semiconductor
Product Status	Obsolete	Active	Active
Output Voltage	3.3V	3.3V	3.3V
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-WFBGA, DSBGA	5-WFBGA, DSBGA	5-WFBGA, DSBGA
Supplier Device Package	5-DSBGA (1.41x1.08)	5-DSBGA (1.41x1.08)	5-DSBGA (1.5x1.2)
Packaging Format	Not specified	Tape & Reel (TR)	Bulk
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not specified

Engineering Selection Recommendations

For applications currently using the obsolete LP3985IBP-3.3/NOPB, the LP3985ITL-3.3/NOPB is the primary recommended substitute. This part maintains Active product status with Texas Instruments, ensuring long-term availability and support. Both the main part and this substitute are ROHS3 compliant and carry identical electrical specifications, making them functionally interchangeable.

The LP3985ITLX-3.3/NOPB serves as a parametric equivalent with identical electrical performance. This part is also Active and maintains all critical electrical parameters. The primary distinction is the supplier device package dimension (5-DSBGA 1.5x1.2 versus 1.41x1.08), which may require PCB layout verification for mechanical fit.

Selection between LP3985ITL-3.3/NOPB and LP3985ITLX-3.3/NOPB should be based on packaging format availability (Tape & Reel versus Bulk) and PCB footprint compatibility with the specified package dimensions.

Frequently Asked Questions (FAQ)

Q: Can LP3985ITL-3.3/NOPB be used as a direct replacement for LP3985IBP-3.3/NOPB?

A: Yes. Both parts share identical electrical specifications including output voltage (3.3V), output current (150mA), dropout voltage (0.1V @ 150mA), and protection features. The primary difference is product status: LP3985IBP-3.3/NOPB is Obsolete while LP3985ITL-3.3/NOPB is Active. Packaging format differs (unspecified versus Tape & Reel), but the device package remains the same.

Q: What is the difference between LP3985ITL-3.3/NOPB and LP3985ITLX-3.3/NOPB?

A: Both parts are parametric equivalents with identical electrical performance. The key differences are: manufacturer (Texas Instruments versus National Semiconductor), packaging format (Tape & Reel versus Bulk), and supplier device package dimensions (5-DSBGA 1.41x1.08 versus 5-DSBGA 1.5x1.2). The dimensional difference may affect PCB layout compatibility.

Q: Are all three parts ROHS3 compliant?

A: LP3985IBP-3.3/NOPB and LP3985ITL-3.3/NOPB are explicitly ROHS3 compliant. RoHS status for LP3985ITLX-3.3/NOPB is not specified in the provided data.

Q: What packaging formats are available for these parts?

A: LP3985IBP-3.3/NOPB packaging format is not specified. LP3985ITL-3.3/NOPB is available in Tape & Reel (TR) format. LP3985ITLX-3.3/NOPB is available in Bulk format.

Q: Do the package dimensions differ between substitutes?

A: Yes. LP3985IBP-3.3/NOPB and LP3985ITL-3.3/NOPB both use 5-DSBGA (1.41x1.08) dimensions. LP3985ITLX-3.3/NOPB uses 5-DSBGA (1.5x1.2) dimensions. PCB footprint verification is required when substituting with LP3985ITLX-3.3/NOPB.

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