LP38693SDX-ADJ Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LP38693SDX-ADJ is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 500mA output current in a compact 6-WSON (3x3) surface mount package and is qualified to AEC-Q100 automotive standards. The main part number is currently listed as obsolete, making equivalent substitute parts necessary for ongoing production and design requirements. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer.

Substiute Parts

LP38693SDX-ADJ

Texas InstrumentsIn Stock: 2083LP38693SDX-ADJ Datasheet

Current PartRFQ

LP38693QSD-ADJ/NOPB

Texas InstrumentsIn Stock: 54358LP38693QSD-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

LP38693QSDX-ADJ/NOPB

Texas InstrumentsIn Stock: 2789LP38693QSDX-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

LP38693SD-ADJ/NOPB

Texas InstrumentsIn Stock: 51956LP38693SD-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

LP38693SDX-ADJ/NOPB

Texas InstrumentsIn Stock: 55501LP38693SDX-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP38693SDX-ADJ are determined by strict equivalence across all electrical and mechanical parameters. The following criteria define valid substitutes:

• Identical output configuration (Positive) and output type (Adjustable)
• Matching voltage specifications: Input (Max) 10V, Output range 1.25V to 9V
• Equivalent current ratings: 500mA output, 55 µA quiescent, 100 µA supply maximum
• Identical PSRR performance: 55dB at 120Hz
• Same control features (Enable) and protection (Over Temperature)
• Matching operating temperature range: -40°C to 125°C
• Automotive grade with AEC-Q100 qualification
• Identical package: 6-WDFN Exposed Pad / 6-WSON (3x3)
• Same MSL rating: 1 (Unlimited)

All substitute parts listed below meet these criteria. Differences exist only in product status (Active vs. Obsolete) and packaging format (Cut Tape & Digi-Reel vs. Tape & Reel).

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed above provide complete electrical and mechanical equivalence to the LP38693SDX-ADJ. Selection should be based on the following factors:

Product Status: The original LP38693SDX-ADJ is obsolete. All four substitute part numbers (LP38693QSD-ADJ/NOPB, LP38693QSDX-ADJ/NOPB, LP38693SD-ADJ/NOPB, LP38693SDX-ADJ/NOPB) are active products with ongoing manufacturer support and availability.

Compliance: All substitute parts are ROHS3 compliant, whereas the original part is RoHS non-compliant. This compliance upgrade is beneficial for applications subject to RoHS regulations.

Packaging Format: Substitute parts are available in two packaging configurations: Cut Tape & Digi-Reel (CT) format for LP38693QSD-ADJ/NOPB and LP38693SD-ADJ/NOPB, and Tape & Reel (TR) format for LP38693QSDX-ADJ/NOPB. The original LP38693SDX-ADJ/NOPB is also available in Cut Tape & Digi-Reel format. Select packaging based on procurement and assembly requirements.

Inventory Availability: LP38693SDX-ADJ/NOPB offers the highest inventory level (55,395 pcs), followed by LP38693QSD-ADJ/NOPB (54,280 pcs) and LP38693SD-ADJ/NOPB (51,900 pcs). LP38693QSDX-ADJ/NOPB has lower availability (2,700 pcs).

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for LP38693SDX-ADJ?

A: Yes. All four substitute part numbers are electrically and mechanically equivalent. They share identical electrical specifications, operating parameters, package dimensions, and pin configurations. Direct substitution is valid from a functional standpoint.

Q: What is the difference between the substitute part numbers?

A: The differences are limited to packaging format and product status. LP38693QSD-ADJ/NOPB and LP38693SD-ADJ/NOPB use Cut Tape & Digi-Reel packaging, while LP38693QSDX-ADJ/NOPB uses Tape & Reel packaging. All are active products with ROHS3 compliance. The original LP38693SDX-ADJ is obsolete and RoHS non-compliant.

Q: Why is the original part marked as obsolete?

A: The LP38693SDX-ADJ has been discontinued by Texas Instruments. Active alternatives with identical specifications are available to support ongoing production requirements.

Q: Are there any electrical performance differences between these parts?

A: No. All parts deliver identical electrical performance: 500mA output current, 1.25V to 9V adjustable output range, 55 µA quiescent current, 55dB PSRR at 120Hz, and -40°C to 125°C operating temperature range.

Q: Does the RoHS compliance difference affect compatibility?

A: RoHS3 compliance is a regulatory and environmental attribute, not an electrical one. All substitute parts maintain full electrical and functional equivalence. ROHS3 compliance is advantageous for applications subject to RoHS regulations.

Q: Which packaging format should I select?

A: Select based on your assembly process requirements. Cut Tape & Digi-Reel (CT) format is suitable for manual or semi-automated assembly. Tape & Reel (TR) format is optimized for high-speed automated pick-and-place assembly. Both formats contain the same component.

Q: Can I mix different substitute part numbers in the same design?

A: Yes. All substitute parts are electrically and mechanically identical. Mixing part numbers in the same design or across production batches does not affect circuit performance or reliability.