LP3853ET-2.5 Equivalent & Substitute Parts

Part Overview

The LP3853ET-2.5 is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive output of 2.5V at 3A in a TO-220-5 package configuration. The device features integrated protection against overcurrent, overtemperature, and short circuit conditions, with an enable control feature for power management applications.

The LP3853ET-2.5 carries an obsolete product status. Identifying equivalent and parametrically compatible substitute parts is essential for design continuity, procurement flexibility, and long-term supply chain reliability.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Package / Case	TO-220-5 Formed Leads
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	2.5V
Voltage - Input (Max)	7V
Current - Output	3A
Voltage Dropout (Max)	0.6V @ 3A
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3853ET-2.5 are classified based on strict parameter alignment across electrical and mechanical specifications:

Direct Manufacturer Equivalent: LP3853ET-2.5/NOPB matches all electrical parameters and package specifications identically to the main part. The primary distinction is product status (Active vs. Obsolete) and packaging format (Tube vs. unspecified).

Parametric Equivalents: LP3856ET-2.5/NOPB and LP3876ET-2.5/NOPB share identical output voltage (2.5V), output current (3A), input voltage maximum (7V), operating temperature range (-40°C ~ 125°C), package type (TO-220-5), and protection features (Over Current, Over Temperature, Short Circuit). These parts maintain functional compatibility within the specified electrical operating envelope.

Key Parameters Determining Substitution:

Fixed output voltage: 2.5V
Output current rating: 3A
Input voltage maximum: 7V
Package / Case: TO-220-5 Formed Leads
Mounting Type: Through Hole
Protection Features: Over Current, Over Temperature, Short Circuit
Control Features: Enable

Parameter Comparison

Parameter	LP3853ET-2.5	LP3853ET-2.5/NOPB	LP3856ET-2.5/NOPB	LP3876ET-2.5/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - Output (Min/Fixed)	2.5V	2.5V	2.5V	2.5V
Voltage - Input (Max)	7V	7V	7V	7V
Current - Output	3A	3A	3A	3A
Voltage Dropout (Max)	0.6V @ 3A	0.6V @ 3A	0.6V @ 3A	1.2V @ 3A
Current - Quiescent (Iq)	4 mA	4 mA	4 mA	5 mA
Current - Supply (Max)	10 mA	10 mA	10 mA	15 mA
PSRR	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	73dB ~ 57dB (120Hz)	Not specified
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-220-5 Formed Leads	TO-220-5 Formed Leads	TO-220-5 Formed Leads	TO-220-5 Formed Leads
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
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
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

LP3853ET-2.5/NOPB is the primary direct equivalent. It maintains identical electrical specifications and package configuration while offering Active product status and ROHS3 compliance. This part is the preferred choice for direct replacement in new procurement cycles.

LP3856ET-2.5/NOPB is a parametric equivalent suitable for applications where the specified electrical parameters are sufficient. It shares identical output voltage, current rating, input voltage maximum, and protection features. ROHS3 compliance and Active product status support long-term supply availability.

LP3876ET-2.5/NOPB is a parametric equivalent from National Semiconductor. While it maintains the same output voltage, current rating, and package configuration, it exhibits higher voltage dropout (1.2V @ 3A versus 0.6V @ 3A), increased quiescent current (5 mA versus 4 mA), and higher maximum supply current (15 mA versus 10 mA). Selection of this part requires confirmation that the application can accommodate these parameter variations without performance degradation.

Frequently Asked Questions (FAQ)

Q: Can LP3853ET-2.5/NOPB be used as a direct replacement for LP3853ET-2.5?

A: Yes. LP3853ET-2.5/NOPB is electrically and mechanically identical to the main part. The differences are packaging format (Tube versus unspecified) and product status (Active versus Obsolete). It is the recommended direct substitute.

Q: What is the primary difference between LP3856ET-2.5/NOPB and LP3876ET-2.5/NOPB?

A: Both are parametric equivalents with identical output voltage (2.5V) and current rating (3A). LP3856ET-2.5/NOPB maintains the same voltage dropout specification (0.6V @ 3A) as the original part. LP3876ET-2.5/NOPB has higher voltage dropout (1.2V @ 3A), higher quiescent current (5 mA), and higher maximum supply current (15 mA). Selection depends on application tolerance for these parameter variations.

Q: Are all substitute parts available in the same TO-220-5 package?

A: Yes. All substitute parts listed use the TO-220-5 Formed Leads package with Through Hole mounting type, ensuring mechanical and thermal compatibility with the original design.

Q: What compliance certifications apply to the substitute parts?

A: LP3853ET-2.5/NOPB and LP3856ET-2.5/NOPB are ROHS3 compliant. LP3876ET-2.5/NOPB compliance status is not specified in the provided data. All parts are REACH Unaffected and classified under ECCN EAR99.

Q: Can LP3876ET-2.5/NOPB be used in applications requiring low dropout voltage?

A: No. LP3876ET-2.5/NOPB exhibits 1.2V dropout at 3A, which is double the 0.6V specification of the original part and LP3856ET-2.5/NOPB. Applications with tight input-to-output voltage margins require LP3853ET-2.5/NOPB or LP3856ET-2.5/NOPB.

Q: What is the inventory status of each substitute part?

A: LP3853ET-2.5/NOPB: 1008 Pcs. LP3856ET-2.5/NOPB: 1031 Pcs. LP3876ET-2.5/NOPB: 863 Pcs. All parts are listed as New Original In Stock.

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