LP38692SD-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP38692SD-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 1A output current in a compact 6-WSON (3x3) package with an adjustable output voltage range from 1.25V to 9V. The main part is currently listed as Obsolete, making equivalent substitute parts necessary for ongoing design support and 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)	10V
Voltage - Output (Min/Fixed)	1.25V
Voltage - Output (Max)	9V
Current - Output	1A
Current - Quiescent (Iq)	55 µA
Current - Supply (Max)	100 µA
PSRR	55dB (120Hz)
Protection Features	Over Temperature
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	6-WDFN Exposed Pad
Supplier Device Package	6-WSON (3x3)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP38692SD-ADJ is determined by strict equivalence across the following critical parameters:

Output Configuration: Positive
Output Type: Adjustable
Voltage - Input (Max): 10V
Voltage - Output (Min/Fixed): 1.25V
Voltage - Output (Max): 9V
Current - Output: 1A
Operating Temperature: -40°C ~ 125°C
Package / Case: 6-WDFN Exposed Pad
Supplier Device Package: 6-WSON (3x3)

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Differences exist only in product status (Active vs. Obsolete), packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), RoHS compliance status, and inventory availability. These variations do not affect functional equivalence in circuit applications.

Parameter Comparison

Parameter	LP38692SD-ADJ	LP38690SD-ADJ/NOPB	LP38690SDX-ADJ/NOPB	LP38692SD-ADJ/NOPB	LP38692SDX-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active
Output Configuration	Positive	Positive	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	10V	10V	10V	10V	10V
Voltage - Output (Min/Fixed)	1.25V	1.25V	1.25V	1.25V	1.25V
Voltage - Output (Max)	9V	9V	9V	9V	9V
Current - Output	1A	1A	1A	1A	1A
Current - Quiescent (Iq)	55 µA	55 µA	55 µA	55 µA	55 µA
Current - Supply (Max)	100 µA	100 µA	100 µA	100 µA	100 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Protection Features	Over Temperature	Over Temperature	Over Temperature	Over Temperature	Over Temperature
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-WDFN Exposed Pad	6-WDFN Exposed Pad
Supplier Device Package	6-WSON (3x3)	6-WSON (3x3)	6-WSON (3x3)	6-WSON (3x3)	6-WSON (3x3)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99
HTSUS	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001

Engineering Selection Recommendations

For new designs and ongoing production, LP38692SD-ADJ/NOPB and LP38692SDX-ADJ/NOPB are the primary substitutes. Both are Active products with ROHS3 compliance, providing long-term availability and regulatory alignment. The choice between these two depends on packaging requirements: LP38692SD-ADJ/NOPB is supplied in Cut Tape & Digi-Reel format, while LP38692SDX-ADJ/NOPB is supplied in Tape & Reel format.

LP38690SD-ADJ/NOPB and LP38690SDX-ADJ/NOPB are functionally equivalent alternatives from the same manufacturer. The LP38690 base product number indicates a different device variant, but electrical and mechanical specifications remain identical to the LP38692 series. These parts are also Active with ROHS3 compliance. The LP38690SDX-ADJ/NOPB variant includes a documented dropout voltage specification of 1.6V @ 1A, providing additional technical clarity for design calculations.

All substitute parts maintain identical pinout, thermal characteristics, and functional performance within the specified operating temperature range of -40°C to 125°C. Selection should be based on packaging format availability, inventory status, and compliance requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can LP38690SD-ADJ/NOPB replace LP38692SD-ADJ in existing designs?

A: Yes. Both parts are functionally equivalent linear voltage regulators with identical electrical specifications, output voltage range (1.25V to 9V), current rating (1A), and 6-WSON (3x3) package. The LP38690 and LP38692 base product numbers represent different device variants, but they share all critical parameters required for circuit substitution.

Q: What is the difference between the SD and SDX suffix variants?

A: The SD suffix indicates Cut Tape & Digi-Reel packaging, while the SDX suffix indicates Tape & Reel packaging. Both variants are electrically identical. Selection depends on procurement and assembly requirements. Tape & Reel (SDX) is typically preferred for high-volume automated assembly, while Cut Tape (SD) is suitable for lower-volume or mixed-component applications.

Q: Why is the original LP38692SD-ADJ listed as Obsolete?

A: The original part is marked Obsolete and is RoHS non-compliant. Active substitutes (LP38692SD-ADJ/NOPB, LP38692SDX-ADJ/NOPB, LP38690SD-ADJ/NOPB, LP38690SDX-ADJ/NOPB) are ROHS3 compliant and provide continued product support from Texas Instruments.

Q: Are there any electrical performance differences between LP38692 and LP38690 variants?

A: No. Both maintain identical voltage input/output specifications, current ratings, quiescent current (55 µA), supply current (100 µA maximum), PSRR (55dB at 120Hz), and over-temperature protection. The LP38690SDX-ADJ/NOPB provides a documented dropout voltage of 1.6V @ 1A, while other variants do not specify this parameter in the provided data.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All substitute parts share the identical 6-WDFN Exposed Pad package with 6-WSON (3x3) footprint, pinout, and thermal characteristics. No PCB layout modifications are required for substitution.

Q: What inventory levels are available for each substitute?

A: LP38690SD-ADJ/NOPB: 8,121 pcs; LP38690SDX-ADJ/NOPB: 1,367 pcs; LP38692SD-ADJ/NOPB: 8,706 pcs; LP38692SDX-ADJ/NOPB: 4,516 pcs. All parts are listed as New Original In Stock.

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