LP8340CDTX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP8340CDTX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments designed to deliver a fixed 3.3V output at 1A maximum current. This device is classified as a positive fixed output regulator in the Power Management (PMIC) category and is packaged in TO-252-3 (DPAK) surface mount configuration.

The LP8340CDTX-3.3/NOPB has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this regulator.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3.3V
Maximum Output Current	1A
Maximum Input Voltage	10V
Maximum Dropout Voltage	1V @ 1A
Quiescent Current	100 µA
Package Type	TO-252-3 (DPAK)
Operating Temperature Range	0°C to 125°C
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitute parts for the LP8340CDTX-3.3/NOPB are selected based on the following critical parameters:

Fixed output voltage of 3.3V
Output current capability of 1A or greater
Surface mount packaging compatible with TO-252-3 footprint or equivalent
Over current and over temperature protection
RoHS3 compliance and MSL Level 1 rating

Two substitute parts meet these criteria and are currently in active production status with adequate inventory availability.

Parameter Comparison

Parameter	LP8340CDTX-3.3/NOPB (Main)	BA33BC0FP-E2 (Rohm)	LT1965EMS8E-3.3#PBF (Analog Devices)
Manufacturer	Texas Instruments	Rohm Semiconductor	Analog Devices Inc.
Output Voltage	3.3V	3.3V	3.3V
Output Current	1A	1A	1.1A
Maximum Input Voltage	10V	16V	20V
Dropout Voltage	1V @ 1A	Not specified	0.49V @ 1.1A
Quiescent Current	100 µA	0.5 mA	1.1 mA
Package	TO-252-3	TO-252-3	8-MSOP-EP
Operating Temperature	0°C to 125°C	-40°C to 105°C	-40°C to 125°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Reverse Polarity
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both substitute parts are in active production status and carry full RoHS3 compliance with MSL Level 1 ratings, ensuring regulatory alignment and supply chain stability.

BA33BC0FP-E2 (Rohm Semiconductor): This part maintains identical TO-252-3 packaging and 1A output current specification. It supports higher maximum input voltage (16V versus 10V) and offers extended lower operating temperature range (-40°C). The footprint compatibility is direct. Inventory availability is substantial at 31,378 pieces.

LT1965EMS8E-3.3#PBF (Analog Devices Inc.): This part provides 1.1A output current capability, superior dropout voltage performance (0.49V @ 1.1A), and extended maximum input voltage (20V). It includes reverse polarity protection in addition to standard over current and over temperature protection. The package is 8-MSOP-EP, which differs from the original TO-252-3 footprint and requires PCB layout modification. Inventory availability is 33,668 pieces.

Selection between these substitutes depends on PCB layout constraints and input voltage requirements. Direct footprint replacement is available with BA33BC0FP-E2. Enhanced performance and higher input voltage tolerance are available with LT1965EMS8E-3.3#PBF at the cost of package redesign.

Frequently Asked Questions (FAQ)

Q: Can BA33BC0FP-E2 be used as a direct replacement for LP8340CDTX-3.3/NOPB?

A: Yes. Both parts use TO-252-3 packaging, deliver 3.3V fixed output at 1A, and include identical protection features. No PCB layout modification is required. The BA33BC0FP-E2 supports higher input voltage (16V maximum) and operates across a wider temperature range (-40°C to 105°C).

Q: What are the package differences between the substitute parts?

A: BA33BC0FP-E2 uses TO-252-3 (DPAK) packaging, identical to the original LP8340CDTX-3.3/NOPB. LT1965EMS8E-3.3#PBF uses 8-MSOP-EP packaging, which has a different footprint and pin configuration. PCB redesign is necessary for the Analog Devices part.

Q: Which substitute part has better dropout voltage performance?

A: LT1965EMS8E-3.3#PBF delivers 0.49V dropout at 1.1A output current, compared to 1V dropout at 1A for the original part. BA33BC0FP-E2 dropout voltage is not specified in available documentation.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both BA33BC0FP-E2 and LT1965EMS8E-3.3#PBF carry full RoHS3 compliance and MSL Level 1 ratings, matching the original LP8340CDTX-3.3/NOPB specifications.

Q: What is the maximum input voltage difference between substitutes?

A: The original LP8340CDTX-3.3/NOPB supports 10V maximum input. BA33BC0FP-E2 supports 16V maximum input. LT1965EMS8E-3.3#PBF supports 20V maximum input. Applications requiring input voltages above 10V must use one of the substitute parts.

Q: Does LT1965EMS8E-3.3#PBF offer additional protection features?

A: Yes. LT1965EMS8E-3.3#PBF includes reverse polarity protection in addition to over current and over temperature protection. Both other parts provide over current and over temperature protection only.

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