LP38852SX-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP38852SX-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 1.5A output current in a TO-263 (DDPAK-7) surface mount package and operates across an input voltage range up to 5.5V with adjustable output from 0.8V to 1.8V. The main part number is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	0.8V
Voltage - Output (Max)	1.8V
Current - Output	1.5A
Voltage Dropout (Max)	0.18V @ 1.5A
Current - Quiescent (Iq)	300 µA
Current - Supply (Max)	9 mA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)
Control Features	Enable, Soft Start
Protection Features	Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
Supplier Device Package	TO-263 (DDPAK-7)

Substitute Part Grouping Explanation

Substitution for the LP38852SX-ADJ is determined by strict equivalence across the following critical parameters:

Output configuration (Positive)
Output type (Adjustable)
Voltage specifications (Input Max: 5.5V, Output Min: 0.8V, Output Max: 1.8V)
Current rating (1.5A output)
Voltage dropout performance (0.18V @ 1.5A)
Control and protection features (Enable, Soft Start, Over Current, Over Temperature, Short Circuit, UVLO)
Operating temperature range (-40°C ~ 125°C)
Package type (TO-263 DDPAK-7)

The LP38852SX-ADJ/NOPB is identified as a parametric equivalent with identical electrical and mechanical specifications. The primary distinction is product status and packaging format.

Parameter Comparison

Parameter	LP38852SX-ADJ	LP38852SX-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Output Configuration	Positive	Positive
Output Type	Adjustable	Adjustable
Voltage - Input (Max)	5.5V	5.5V
Voltage - Output (Min/Fixed)	0.8V	0.8V
Voltage - Output (Max)	1.8V	1.8V
Current - Output	1.5A	1.5A
Voltage Dropout (Max)	0.18V @ 1.5A	0.18V @ 1.5A
Current - Quiescent (Iq)	300 µA	300 µA
Current - Supply (Max)	9 mA	9 mA
PSRR	80dB ~ 65dB (120Hz ~ 1kHz)	80dB ~ 65dB (120Hz ~ 1kHz)
Control Features	Enable, Soft Start	Enable, Soft Start
Protection Features	Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)	Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-263-8, D2PAK (7 Leads + Tab), TO-263CA	TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
Supplier Device Package	TO-263 (DDPAK-7)	TO-263 (DDPAK-7)
Product Status	Obsolete	Active
Packaging Format	Bulk	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The LP38852SX-ADJ/NOPB is the direct substitute for the obsolete LP38852SX-ADJ. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications across all critical parameters. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The LP38852SX-ADJ/NOPB carries ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance upgrade aligns with current environmental and regulatory standards for electronic component manufacturing and distribution.

Both parts are supplied in TO-263 (DDPAK-7) surface mount packaging with identical pinout and thermal characteristics. The primary difference is packaging format: the substitute is supplied in Tape & Reel format, which is standard for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can LP38852SX-ADJ/NOPB be used as a direct replacement for LP38852SX-ADJ?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The substitute part is the active production equivalent with improved RoHS compliance status.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free) in Tape & Reel packaging format, as opposed to bulk packaging.

Q: Are there any pinout differences between these parts?

A: No. Both parts use the TO-263 (DDPAK-7) package with identical pinout and lead configuration.

Q: What is the significance of the RoHS compliance difference?

A: The substitute part (LP38852SX-ADJ/NOPB) meets ROHS3 compliance standards, restricting hazardous substances in manufacturing. The original part does not carry this certification. For new designs or applications with regulatory requirements, the compliant version is appropriate.

Q: Are there inventory considerations when selecting between these parts?

A: The original LP38852SX-ADJ is obsolete with limited remaining stock. The LP38852SX-ADJ/NOPB is in active production with established supply channels, making it the preferred choice for ongoing procurement and new designs.

Q: Do these parts require different PCB layouts or thermal management approaches?

A: No. Both parts share identical electrical performance, thermal characteristics, and package dimensions. PCB layouts and thermal management strategies are directly transferable.

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