LP38690SDX-ADJ Linear Voltage Regulator IC

Part Overview

The LP38690SDX-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This component is classified as a Power Management (PMIC) device and delivers 1A output current in a compact 6-WSON (3x3) surface mount package. The main part number LP38690SDX-ADJ is currently listed as obsolete, making identification of equivalent and substitute parts essential 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
Voltage Dropout (Max)	1.6V @ 1A
Current - Quiescent (Iq)	55 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)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP38690SDX-ADJ is determined by strict equivalence across the following critical parameters:

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
Voltage Dropout (Max): 1.6V @ 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)

Substitute parts are grouped into two categories based on packaging configuration: Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR). All substitute parts maintain identical electrical specifications and thermal performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Output (Max)	Current Output	Dropout (Max)	Iq	RoHS Status	Inventory
LP38690SDX-ADJ	Texas Instruments	Obsolete	-	9V	1A	1.6V @ 1A	55 µA	RoHS non-compliant	1095 Pcs
LP38690SD-ADJ/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	9V	1A	1.6V @ 1A	55 µA	ROHS3 Compliant	8121 Pcs
LP38690SDX-ADJ/NOPB	Texas Instruments	Active	Tape & Reel (TR)	9V	1A	1.6V @ 1A	55 µA	ROHS3 Compliant	1367 Pcs
LP38692SD-ADJ/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	9V	1A	-	55 µA	ROHS3 Compliant	8706 Pcs
LP38692SDX-ADJ/NOPB	Texas Instruments	Active	Tape & Reel (TR)	9V	1A	-	55 µA	ROHS3 Compliant	4516 Pcs

Engineering Selection Recommendations

The obsolete status of LP38690SDX-ADJ necessitates transition to an active product. All substitute parts maintain identical electrical and thermal specifications, ensuring functional compatibility in existing designs.

For new designs or procurement requiring RoHS3 compliance, LP38690SD-ADJ/NOPB or LP38690SDX-ADJ/NOPB are direct replacements with active product status. The choice between these two depends on packaging requirements: Cut Tape (CT) & Digi-Reel® for lower volume applications or Tape & Reel (TR) for higher volume production.

LP38692SD-ADJ/NOPB and LP38692SDX-ADJ/NOPB are parametric equivalents based on the LP38692 base product number. These parts maintain all critical electrical parameters and are suitable for direct substitution. Packaging selection follows the same volume-based criteria.

All substitute parts carry ROHS3 compliance and REACH unaffected status, providing regulatory alignment for modern manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can LP38690SD-ADJ/NOPB be used as a direct replacement for the obsolete LP38690SDX-ADJ?

A: Yes. LP38690SD-ADJ/NOPB is a parametric equivalent with identical electrical specifications, output voltage range (1.25V to 9V), 1A output current, and 6-WSON (3x3) package. The primary difference is packaging format (Cut Tape & Digi-Reel® versus the original configuration) and active product status with ROHS3 compliance.

Q: What is the difference between LP38690SDX-ADJ/NOPB and LP38690SD-ADJ/NOPB?

A: Both parts are electrically identical with the same specifications. The difference lies in packaging: LP38690SDX-ADJ/NOPB is supplied in Tape & Reel (TR) format suitable for automated assembly, while LP38690SD-ADJ/NOPB is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on production volume and assembly requirements.

Q: Are LP38692 variants suitable substitutes for LP38690 variants?

A: Yes. LP38692SD-ADJ/NOPB and LP38692SDX-ADJ/NOPB maintain all critical electrical parameters including output voltage range, current rating, quiescent current, and PSRR. These parts are parametric equivalents and function identically in circuit applications.

Q: What is the significance of the /NOPB suffix?

A: The /NOPB suffix indicates the part is supplied without plumbum (lead-free), confirming RoHS3 compliance and suitability for modern manufacturing standards.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Cut Tape & Digi-Reel® or Tape & Reel) affects only supply and handling logistics, not electrical characteristics or performance. Selection is based on production volume and assembly equipment compatibility.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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