LP3882ESX-1.2 Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP3882ESX-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.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.2V
Voltage - Input (Max)	5.5V
Current - Output	1.5A
Voltage Dropout (Max)	0.32V @ 1.5A
Current - Quiescent (Iq)	30 µA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the LP3882ESX-1.2 are selected based on strict parametric equivalence across the following critical criteria:

Electrical Parameters (Must Match):

Output voltage: 1.2V fixed
Maximum output current: 1.5A
Maximum input voltage: 5.5V
Output configuration: Positive
Control features: Enable function
Protection features: Over-current, over-temperature, short-circuit protection
Operating temperature range: -40°C ~ 125°C
Quiescent current: 30 µA

Mechanical Parameters (Must Match):

Package type: TO-263 (DDPAK-5)
Mounting type: Surface mount
Moisture sensitivity level: 3 (168 Hours)

Allowed Variations:

Voltage dropout: Acceptable range 0.315V to 0.50V @ 1.5A
Current supply (max): Acceptable range 8 mA to 40 mA
Product status: Active substitutes preferred over obsolete
RoHS compliance: ROHS3 compliant substitutes preferred
Packaging format: Tape & Reel acceptable for obsolete bulk packaging

Parameter Comparison

Parameter	LP3882ESX-1.2	LP3882ESX-1.2/NOPB	LP38842SX-1.2/NOPB	LP3892ESX-1.2/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active
Voltage - Output (Min/Fixed)	1.2V	1.2V	1.2V	1.2V
Voltage - Input (Max)	5.5V	5.5V	5.5V	5.5V
Current - Output	1.5A	1.5A	1.5A	1.5A
Voltage Dropout (Max)	0.32V @ 1.5A	0.32V @ 1.5A	0.315V @ 1.5A	0.50V @ 1.5A
Current - Quiescent (Iq)	30 µA	30 µA	30 µA	30 µA
Current - Supply (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)
Control Features	Enable	Enable	Enable	Enable
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
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

Primary Substitute: LP3882ESX-1.2/NOPB

The LP3882ESX-1.2/NOPB is the direct parametric equivalent with active product status. This part maintains identical electrical specifications including voltage dropout (0.32V @ 1.5A) and current supply (8 mA). It carries ROHS3 compliance and is available in Tape & Reel packaging format. This is the preferred substitute for new designs and production continuity.

Secondary Substitute: LP38842SX-1.2/NOPB

The LP38842SX-1.2/NOPB meets all critical electrical and mechanical parameters with marginally improved voltage dropout (0.315V @ 1.5A). The maximum current supply specification is higher at 40 mA. This part is ROHS3 compliant and active. Selection of this part is appropriate where the higher current supply specification does not conflict with circuit design requirements.

Tertiary Substitute: LP3892ESX-1.2/NOPB

The LP3892ESX-1.2/NOPB maintains all core electrical specifications and is ROHS3 compliant with active product status. The voltage dropout specification is higher at 0.50V @ 1.5A. This part carries REACH Affected status, requiring compliance verification for applications subject to REACH regulations. Selection is appropriate for applications where the higher dropout voltage is acceptable and REACH compliance is not a constraint.

All three substitute parts are pin-compatible, mechanically identical, and functionally equivalent within the specified parameter tolerances. Selection should be based on product availability, compliance requirements, and specific circuit performance needs.

Frequently Asked Questions (FAQ)

Q: Can LP3882ESX-1.2/NOPB be used as a direct replacement for LP3882ESX-1.2?

A: Yes. The LP3882ESX-1.2/NOPB is a direct parametric equivalent with identical electrical specifications, package type (TO-263 DDPAK-5), and pin configuration. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

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

A: Both parts deliver 1.2V at 1.5A in identical packages. The LP38842SX-1.2/NOPB has a marginally lower voltage dropout (0.315V vs. 0.32V @ 1.5A) and higher maximum current supply (40 mA vs. 8 mA). These differences are within acceptable substitution tolerances for most applications.

Q: Is LP3892ESX-1.2/NOPB suitable for my application?

A: The LP3892ESX-1.2/NOPB is electrically and mechanically compatible. However, its voltage dropout is 0.50V @ 1.5A, which is higher than the original part (0.32V). Verify that this higher dropout voltage does not exceed your circuit's input voltage margin requirements. Additionally, this part carries REACH Affected status; confirm compliance requirements for your application.

Q: Are all substitute parts available in the same packaging format?

A: The original LP3882ESX-1.2 is available in bulk packaging. All substitute parts (LP3882ESX-1.2/NOPB, LP38842SX-1.2/NOPB, LP3892ESX-1.2/NOPB) are available in Tape & Reel (TR) format. The physical package type (TO-263 DDPAK-5) remains identical across all parts.

Q: What does RoHS compliance mean for my selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The original LP3882ESX-1.2 is RoHS non-compliant. All substitute parts are ROHS3 compliant, making them suitable for applications subject to RoHS requirements. If your application has no RoHS requirement, this difference is not a limiting factor.

Q: Can I use these parts interchangeably in production?

A: Yes, within the specified parameter tolerances. All three substitute parts are pin-compatible and functionally equivalent. However, if your circuit design is sensitive to voltage dropout or current supply specifications, verify that the specific part's parameters meet your requirements before production implementation.

Q: What is the significance of REACH Affected status for LP3892ESX-1.2/NOPB?

A: REACH Affected status indicates the part may contain substances of concern under REACH regulations. If your application or market requires REACH compliance, select LP3882ESX-1.2/NOPB or LP38842SX-1.2/NOPB, both of which have REACH Unaffected status.

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