LP3876ET-1.8 Equivalent & Substitute Parts

Part Overview

The LP3876ET-1.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 3A in a TO-220-5 package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device provides regulated 1.8V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable low-voltage power delivery.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.8V
Output Current	3A
Input Voltage (Max)	7V
Voltage Dropout (Max)	1.2V @ 3A
Package / Case	TO-220-5 Formed Leads
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable

Substitute Part Grouping Explanation

Substitute parts for the LP3876ET-1.8 are qualified based on the following critical parameters:

Fixed output voltage of 1.8V
Output current capability of 3A
Maximum input voltage of 7V
TO-220-5 package with through-hole mounting
Operating temperature range of -40°C to 125°C
Integrated protection features (over-current, over-temperature, short-circuit)
Enable control feature

Two substitute parts meet these electrical and mechanical requirements: LP3876ET-1.8/NOPB (direct manufacturer equivalent) and LP3853ET-1.8/NOPB (parametric equivalent with improved performance characteristics).

Parameter Comparison

Parameter	LP3876ET-1.8	LP3876ET-1.8/NOPB	LP3853ET-1.8/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Voltage	1.8V	1.8V	1.8V
Output Current	3A	3A	3A
Input Voltage (Max)	7V	7V	7V
Voltage Dropout (Max)	1.2V @ 3A	1.2V @ 3A	0.6V @ 3A
Quiescent Current (Iq)	5 mA	5 mA	4 mA
Supply Current (Max)	15 mA	15 mA	10 mA
Package / Case	TO-220-5 Formed Leads	TO-220-5 Formed Leads	TO-220-5 Formed Leads
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
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
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

LP3876ET-1.8/NOPB is the direct manufacturer equivalent with identical electrical specifications and active product status. This part is ROHS3 compliant and represents the primary substitute for obsolete LP3876ET-1.8 applications requiring no design modifications.

LP3853ET-1.8/NOPB is a parametric equivalent offering improved performance characteristics. This part features reduced voltage dropout (0.6V versus 1.2V at 3A), lower quiescent current (4 mA versus 5 mA), and reduced maximum supply current (10 mA versus 15 mA). LP3853ET-1.8/NOPB is also ROHS3 compliant and active. The improved dropout voltage and lower quiescent current make this part suitable for applications with tighter power budget constraints or lower input voltage margins.

Both substitute parts maintain identical package, mounting type, output voltage, output current, input voltage maximum, operating temperature range, and protection features as the original LP3876ET-1.8.

Frequently Asked Questions (FAQ)

Q: Can LP3876ET-1.8/NOPB be used as a direct replacement for LP3876ET-1.8?

A: Yes. LP3876ET-1.8/NOPB is the direct manufacturer equivalent with identical electrical specifications, package, and mounting configuration. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant).

Q: What is the difference between LP3876ET-1.8/NOPB and LP3853ET-1.8/NOPB?

A: Both parts provide 1.8V at 3A output in TO-220-5 packages. LP3853ET-1.8/NOPB offers improved performance with lower voltage dropout (0.6V versus 1.2V at 3A), lower quiescent current (4 mA versus 5 mA), and reduced supply current (10 mA versus 15 mA). Both are active and ROHS3 compliant.

Q: Are the substitute parts pin-compatible with LP3876ET-1.8?

A: Yes. Both LP3876ET-1.8/NOPB and LP3853ET-1.8/NOPB use the TO-220-5 Formed Leads package with identical pinout, enabling direct board-level substitution without layout modifications.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application requirements. LP3876ET-1.8/NOPB provides identical performance to the original part. LP3853ET-1.8/NOPB is recommended for applications requiring lower power dissipation, improved efficiency, or operation with lower input voltage margins due to its reduced dropout voltage.

Q: Are both substitute parts available in the same packaging options?

A: Both LP3876ET-1.8/NOPB and LP3853ET-1.8/NOPB are supplied in Tube packaging and use TO-220-5 Formed Leads as the package / case type.

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