LP38693MPX-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LP38693MPX-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 500mA output current in a compact SOT-223-5 package and is classified as Active product status. The device is suitable for applications requiring adjustable voltage regulation with enable control and over-temperature protection. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when alternative packaging formats are preferred.

Substiute Parts

LP38693MPX-ADJ/NOPB

Texas InstrumentsIn Stock: 19133LP38693MPX-ADJ/NOPB Datasheet

Current PartRFQ

LP38693MP-ADJ/NOPB

Texas InstrumentsIn Stock: 22223LP38693MP-ADJ/NOPB Datasheet

Parametric EquivalentRFQ

NCV8535MNADJR2G

onsemiIn Stock: 16073NCV8535MNADJR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP38693MPX-ADJ/NOPB are identified based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Output Configuration: Positive
• Output Type: Adjustable
• Current - Output: 500mA
• Voltage - Output (Min/Fixed): 1.25V
• Voltage - Output (Max): 9V or higher
• Voltage - Input (Max): 10V or higher
• Number of Regulators: 1
• Control Features: Enable
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Parametric Equivalent: LP38693MP-ADJ/NOPB differs only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) while maintaining identical electrical specifications and SOT-223-5 package compatibility.

Manufacturer Recommended Substitute: NCV8535MNADJR2G from onsemi provides functional equivalence with allowable parameter variations including higher maximum input voltage (12V), higher maximum output voltage (10V), and automotive-grade qualification (AEC-Q100). Package format differs (10-DFN 3x3) requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

LP38693MP-ADJ/NOPB (Parametric Equivalent): This substitute is recommended as the primary alternative when LP38693MPX-ADJ/NOPB is unavailable. Electrical specifications are identical, and both devices use the SOT-223-5 package. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect circuit performance or PCB assembly compatibility. This part maintains the same operating temperature range (-40°C ~ 125°C) and all protection features. Selection of this substitute requires no design modifications.

NCV8535MNADJR2G (Manufacturer Recommended Substitute): This onsemi device is suitable for applications where higher input voltage tolerance (12V maximum versus 10V) or higher output voltage capability (10V maximum versus 9V) is beneficial. The device includes additional over-current protection beyond the over-temperature protection of the primary part. However, the 10-DFN (3x3) package requires PCB layout redesign compared to the SOT-223-5 footprint. The operating temperature maximum is reduced to 85°C, which may be a constraint in high-temperature applications. This part carries AEC-Q100 automotive qualification, making it suitable for automotive-grade designs. Quiescent current is higher (190 µA versus 55 µA), which may impact low-power standby applications.

Frequently Asked Questions (FAQ)

Q: Can LP38693MP-ADJ/NOPB be used as a direct replacement for LP38693MPX-ADJ/NOPB?

A: Yes. Both parts are electrically identical with the same SOT-223-5 package footprint. The difference is packaging format only (Cut Tape & Digi-Reel® versus Tape & Reel). No design changes are required for PCB assembly or circuit operation.

Q: What are the key differences between LP38693MPX-ADJ/NOPB and NCV8535MNADJR2G?

A: The primary differences are: (1) Package format—NCV8535MNADJR2G uses 10-DFN (3x3) instead of SOT-223-5, requiring PCB redesign; (2) Maximum input voltage—NCV8535MNADJR2G supports 12V versus 10V; (3) Maximum output voltage—NCV8535MNADJR2G supports 10V versus 9V; (4) Quiescent current—NCV8535MNADJR2G draws 190 µA versus 55 µA; (5) Operating temperature maximum—NCV8535MNADJR2G is rated to 85°C versus 125°C; (6) Protection features—NCV8535MNADJR2G includes over-current protection in addition to over-temperature protection.

Q: Is NCV8535MNADJR2G suitable for high-temperature applications above 85°C?

A: No. The NCV8535MNADJR2G maximum operating temperature is 85°C. For applications requiring operation up to 125°C, the LP38693MPX-ADJ/NOPB or LP38693MP-ADJ/NOPB must be used.

Q: Does the NCV8535MNADJR2G package change affect circuit design?

A: Yes. The NCV8535MNADJR2G uses a 10-DFN (3x3) package compared to the SOT-223-5 package of the primary part. This requires PCB footprint modification, trace routing changes, and thermal management evaluation. The exposed pad on the 10-DFN package may provide improved thermal performance compared to SOT-223-5.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. LP38693MP-ADJ/NOPB and NCV8535MNADJR2G are both ROHS3 compliant, matching the primary part specification.

Q: Which substitute should be selected for automotive applications?

A: NCV8535MNADJR2G is qualified to AEC-Q100 automotive standards, making it the appropriate choice for automotive-grade designs. However, the package change and reduced maximum operating temperature must be evaluated against application requirements.

Q: Can the output voltage range of 1.25V to 9V be exceeded with NCV8535MNADJR2G?

A: NCV8535MNADJR2G supports output voltage up to 10V, providing an additional 1V of maximum output voltage capability compared to the primary part. The minimum output voltage remains 1.25V for both devices.