LP3892ESX-1.2 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP3892ESX-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.2V output at 1.5A in a TO-263 (DDPAK-5) surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The device provides regulated 1.2V output with integrated protection features including over-current, over-temperature, and short-circuit protection, suitable for applications requiring stable low-voltage power delivery in compact form factors.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	1.2V
Output Current	1.5A
Input Voltage (Max)	5.5V
Package Type	TO-263-6 (DDPAK-5)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 125°C
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitution eligibility for the LP3892ESX-1.2 is determined by the following critical parameters:

Output voltage specification: 1.2V fixed
Output current capability: 1.5A minimum
Input voltage tolerance: 5.5V maximum
Package compatibility: TO-263-6 (DDPAK-5) surface mount
Control and protection features: Enable function with over-current, over-temperature, and short-circuit protection
Operating temperature range: -40°C to 125°C

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications. Differences in dropout voltage, quiescent current, and supply current are secondary parameters that do not affect substitutability within the defined electrical envelope.

Parameter Comparison

Parameter	LP3892ESX-1.2	LP3882ESX-1.2/NOPB	LP38842SX-1.2/NOPB	LP3892ESX-1.2/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	1.2V	1.2V	1.2V	1.2V
Output Current	1.5A	1.5A	1.5A	1.5A
Input Voltage (Max)	5.5V	5.5V	5.5V	5.5V
Voltage Dropout (Max)	0.50V @ 1.5A	0.32V @ 1.5A	0.315V @ 1.5A	0.50V @ 1.5A
Quiescent Current	30 µA	30 µA	30 µA	30 µA
Supply Current (Max)	8 mA	8 mA	40 mA	8 mA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)
Package	TO-263-6 (DDPAK-5)	TO-263-6 (DDPAK-5)	TO-263-6 (DDPAK-5)	TO-263-6 (DDPAK-5)
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For new designs and production applications, LP3882ESX-1.2/NOPB and LP38842SX-1.2/NOPB are preferred substitutes due to active product status and ROHS3 compliance. Both parts maintain full electrical equivalence with the obsolete LP3892ESX-1.2 while offering improved regulatory compliance.

LP3882ESX-1.2/NOPB provides superior dropout voltage performance (0.32V versus 0.50V) with identical supply current specifications, making it suitable for applications with tighter input voltage margins.

LP38842SX-1.2/NOPB offers equivalent dropout voltage performance (0.315V) with higher maximum supply current (40 mA versus 8 mA), appropriate for applications requiring additional internal current capacity.

LP3892ESX-1.2/NOPB (tape and reel packaging variant) maintains identical electrical specifications to the original part while providing ROHS3 compliance and active product status, serving as a direct replacement for existing designs.

Frequently Asked Questions (FAQ)

Q: Can LP3882ESX-1.2/NOPB directly replace LP3892ESX-1.2 in existing circuits?

A: Yes. Both parts share identical output voltage (1.2V), output current (1.5A), input voltage rating (5.5V max), package type (TO-263-6), and protection features. The lower dropout voltage of LP3882ESX-1.2/NOPB (0.32V) is a performance improvement that does not affect compatibility.

Q: What is the difference between LP38842SX-1.2/NOPB and LP3882ESX-1.2/NOPB?

A: Both parts are electrically equivalent with nearly identical dropout voltages (0.315V versus 0.32V). The primary difference is maximum supply current: LP38842SX-1.2/NOPB specifies 40 mA while LP3882ESX-1.2/NOPB specifies 8 mA. This difference does not affect substitutability for standard applications.

Q: Is the tape and reel packaging variant LP3892ESX-1.2/NOPB compatible with the original LP3892ESX-1.2?

A: Yes. The /NOPB variant uses identical electrical specifications and the same TO-263-6 package. The packaging format (tape and reel versus bulk) does not affect circuit performance or pin compatibility.

Q: Why is the original LP3892ESX-1.2 marked as obsolete?

A: Product obsolescence is a manufacturer lifecycle decision. Active alternatives with identical electrical specifications and improved compliance certifications are available from Texas Instruments.

Q: Are all substitute parts RoHS compliant?

A: LP3882ESX-1.2/NOPB, LP38842SX-1.2/NOPB, and LP3892ESX-1.2/NOPB are all ROHS3 compliant. The original LP3892ESX-1.2 is RoHS non-compliant.

Q: Do the substitute parts require PCB layout modifications?

A: No. All substitute parts use the identical TO-263-6 (DDPAK-5) package with the same pin configuration and thermal characteristics, requiring no PCB redesign.

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