LP38693SDX-2.5/NOPB Equivalent & Substitute Parts

Part Overview

The LP38693SDX-2.5/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed 2.5V output at 500mA with a maximum dropout voltage of 0.73V, housed in a 6-WSON (3x3) surface mount package. The device is automotive-grade and AEC-Q100 qualified, designed for applications requiring stable low-voltage regulation in harsh operating environments.

This part is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this regulator.

Substiute Parts

LP38693SDX-2.5/NOPB

Texas InstrumentsIn Stock: 998LP38693SDX-2.5/NOPB Datasheet

Current PartRFQ

LP38691QSD-2.5/NOPB

Texas InstrumentsIn Stock: 2522LP38691QSD-2.5/NOPB Datasheet

Parametric EquivalentRFQ

LP38691QSDX-2.5/NOPB

Texas InstrumentsIn Stock: 986LP38691QSDX-2.5/NOPB Datasheet

Parametric EquivalentRFQ

LP38691SD-2.5/NOPB

Texas InstrumentsIn Stock: 3338LP38691SD-2.5/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP38693SDX-2.5/NOPB is determined by strict equivalence across the following critical parameters:

• Output voltage: 2.5V fixed
• Output current capability: 500mA
• Maximum input voltage: 10V
• Dropout voltage: 0.73V @ 500mA
• Quiescent current: 55 µA
• Power supply rejection ratio: 55dB (120Hz)
• Operating temperature range: -40°C ~ 125°C
• Package: 6-WSON (3x3) surface mount
• Automotive grade and AEC-Q100 qualification
• RoHS3 compliance

All substitute parts listed maintain identical electrical specifications and package requirements. Differences exist only in product status (active vs. obsolete) and base product numbering within the LP38691 series.

Parameter Comparison

Engineering Selection Recommendations

The LP38693SDX-2.5/NOPB is obsolete; however, three active alternatives exist within the LP38691 series that maintain full parametric equivalence:

LP38691QSD-2.5/NOPB, LP38691QSDX-2.5/NOPB, and LP38691SD-2.5/NOPB are all active products with identical electrical performance, package configuration, and automotive qualifications. These parts are suitable direct replacements for new designs and ongoing production.

Selection among the three active alternatives should be based on:

• Availability: LP38691SD-2.5/NOPB has the highest inventory (3300 pcs), followed by LP38691QSDX-2.5/NOPB (953 pcs) and LP38691QSD-2.5/NOPB (2473 pcs)
• Compliance requirements: All three maintain ROHS3 compliance and AEC-Q100 qualification
• Supply chain continuity: Active product status ensures long-term availability and support

Frequently Asked Questions (FAQ)

Q: Can LP38691 series parts directly replace the LP38693SDX-2.5/NOPB?

A: Yes. The LP38691QSD-2.5/NOPB, LP38691QSDX-2.5/NOPB, and LP38691SD-2.5/NOPB are parametric equivalents with identical output voltage, current rating, dropout voltage, quiescent current, PSRR, operating temperature range, and package configuration. All are automotive-grade and AEC-Q100 qualified.

Q: What is the difference between LP38691QSD-2.5/NOPB, LP38691QSDX-2.5/NOPB, and LP38691SD-2.5/NOPB?

A: All three parts are electrically identical. Differences exist only in base product numbering and HTSUS codes. The "Q" designation and "X" suffix variations do not affect electrical performance or functional compatibility.

Q: Is the 6-WSON (3x3) package compatible across all substitute parts?

A: Yes. All substitute parts use the 6-WSON (3x3) surface mount package with exposed pad, ensuring identical PCB footprint and thermal characteristics.

Q: Are all substitute parts automotive-qualified?

A: Yes. All three LP38691 variants are automotive-grade with AEC-Q100 qualification, matching the original LP38693SDX-2.5/NOPB specification.

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

A: All parts, including the original and substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.