LP38693SD-5.0 Linear Voltage Regulator — Equivalent & Substitute Parts

Part Overview

The LP38693SD-5.0 is a linear voltage regulator IC from Texas Instruments, delivering a fixed 5V output at 500mA in a 6-WSON (3x3) surface mount package. This device is classified as Not For New Designs, indicating it has reached end-of-life status. The part provides automotive-grade performance with AEC-Q100 qualification, making it suitable for automotive and industrial applications requiring regulated 5V power delivery with low dropout voltage and integrated over-temperature protection.

Due to its Not For New Designs status, identifying parametrically equivalent or manufacturer-recommended alternatives is essential for ongoing production support and new design initiatives.

Substiute Parts

LP38693SD-5.0

Texas InstrumentsIn Stock: 880LP38693SD-5.0 Datasheet

Current PartRFQ

LP38693QSD-5.0/NOPB

Texas InstrumentsIn Stock: 2019LP38693QSD-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP38693QSDX-5.0/NOPB

Texas InstrumentsIn Stock: 818LP38693QSDX-5.0/NOPB Datasheet

Parametric EquivalentRFQ

LP38693SD-5.0/NOPB

Texas InstrumentsIn Stock: 1167LP38693SD-5.0/NOPB Datasheet

Parametric EquivalentRFQ

NCP606MN50T2G

onsemiIn Stock: 1804NCP606MN50T2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LP38693SD-5.0 is determined by the following critical parameters:

• Fixed output voltage of 5V
• Output current capability of 500mA
• Maximum input voltage of 10V or greater
• Surface mount package compatibility (6-WSON or equivalent footprint)
• Automotive-grade qualification (AEC-Q100)
• Operating temperature range of -40°C to 125°C
• Enable control feature and over-temperature protection

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments LP38693 Series): Parts LP38693QSD-5.0/NOPB and LP38693QSDX-5.0/NOPB maintain identical electrical specifications and package footprint. These differ only in packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Not For New Designs). Both are ROHS3 compliant.

Manufacturer-Recommended Alternative (onsemi NCP606MN50T2G): This part meets the core functional requirements (5V, 500mA output) and automotive qualification but operates with a lower maximum input voltage (6V versus 10V) and exhibits different electrical characteristics (lower dropout voltage, higher quiescent current, additional short-circuit protection).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): LP38693QSD-5.0/NOPB and LP38693QSDX-5.0/NOPB are the primary alternatives. Both maintain identical electrical performance and package footprint compatibility. LP38693QSDX-5.0/NOPB is recommended for new production orders due to its Active product status and Tape & Reel packaging format. LP38693QSD-5.0/NOPB is suitable where Cut Tape & Digi-Reel packaging is acceptable. Both parts are ROHS3 compliant and AEC-Q100 qualified, addressing regulatory and automotive requirements.

For Applications with Lower Input Voltage Requirements: NCP606MN50T2G from onsemi is a manufacturer-recommended alternative suitable for applications where the maximum input voltage does not exceed 6V. This part offers superior dropout voltage performance (0.2V versus 0.45V) and includes integrated short-circuit protection. However, the package footprint differs (6-DFN 3x3.3 versus 6-WSON 3x3), requiring PCB layout verification. The higher quiescent current (180 µA versus 55 µA) may impact low-power standby applications. AEC-Q100 qualification status for this part is not specified in the provided data.

Compliance Considerations: The original LP38693SD-5.0 is RoHS non-compliant. Both Texas Instruments alternatives and the onsemi substitute are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Frequently Asked Questions (FAQ)

Q: Can LP38693QSD-5.0/NOPB and LP38693QSDX-5.0/NOPB be used interchangeably with LP38693SD-5.0?

A: Yes. Both parts are parametrically equivalent with identical electrical specifications, output voltage, current rating, dropout voltage, and package footprint. The only differences are packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active). No circuit modifications are required.

Q: What is the key difference between the Texas Instruments LP38693 variants and the onsemi NCP606MN50T2G?

A: The primary differences are maximum input voltage (10V for LP38693 versus 6V for NCP606), dropout voltage (0.45V versus 0.2V), quiescent current (55 µA versus 180 µA), and package footprint (6-WSON 3x3 versus 6-DFN 3x3.3). The NCP606 is suitable only for applications with input voltages not exceeding 6V and requires PCB layout changes due to package differences.

Q: Is the NCP606MN50T2G suitable for automotive applications?

A: The NCP606MN50T2G is Active and ROHS3 compliant. However, AEC-Q100 qualification status is not specified in the provided data. Verification with onsemi is required before use in automotive applications where AEC-Q100 qualification is mandatory.

Q: What packaging formats are available for the LP38693 alternatives?

A: LP38693QSD-5.0/NOPB is supplied in Cut Tape & Digi-Reel format. LP38693QSDX-5.0/NOPB is supplied in Tape & Reel format. Both maintain the same 6-WSON (3x3) package footprint and are compatible with standard pick-and-place assembly equipment.

Q: Why is the original LP38693SD-5.0 marked as Not For New Designs?

A: This designation indicates the part has reached end-of-life status. Texas Instruments recommends using LP38693QSD-5.0/NOPB or LP38693QSDX-5.0/NOPB for new designs. Both alternatives are Active products with identical performance and improved RoHS compliance.

Q: Are there any thermal or power dissipation differences between these parts?

A: All parts operate within the same -40°C to 125°C temperature range and share identical output current and dropout voltage specifications under standard conditions. Thermal performance is determined by package design and PCB layout. The 6-WSON and 6-DFN packages have similar thermal characteristics for this power level.