LP38693MPX-ADJ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP38693MPX-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 SOT-223-5 surface mount package and is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and procurement planning. The substitute parts listed maintain identical electrical specifications and mechanical compatibility while offering improved product status and compliance certifications.

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	500mA
Current - Quiescent (Iq)	55 µA
Current - Supply (Max)	100 µA
PSRR	55dB (120Hz)
Control Features	Enable
Protection Features	Over Temperature
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP38693MPX-ADJ is determined by strict equivalence across the following critical parameters:

Output configuration (Positive)
Output type (Adjustable)
Voltage specifications (Input Max: 10V, Output Min: 1.25V, Output Max: 9V)
Current rating (500mA output)
Quiescent current (55 µA)
Control and protection features (Enable, Over Temperature)
Operating temperature range (-40°C ~ 125°C)
Package type (SOT-223-5)
Mounting type (Surface Mount)

The substitute parts LP38693MPX-ADJ/NOPB and LP38693MP-ADJ/NOPB maintain identical electrical and mechanical specifications. The primary differences are product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. Cut Tape & Digi-Reel).

Parameter Comparison

Parameter	LP38693MPX-ADJ	LP38693MPX-ADJ/NOPB	LP38693MP-ADJ/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Packaging	-	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Voltage - Input (Max)	10V	10V	10V
Voltage - Output (Min/Fixed)	1.25V	1.25V	1.25V
Voltage - Output (Max)	9V	9V	9V
Current - Output	500mA	500mA	500mA
Current - Quiescent (Iq)	55 µA	55 µA	55 µA
Current - Supply (Max)	100 µA	100 µA	100 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature	Over Temperature	Over Temperature
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-261-5, TO-261AB	TO-261-5, TO-261AB	TO-261-5, TO-261AB
Supplier Device Package	SOT-223-5	SOT-223-5	SOT-223-5
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both LP38693MPX-ADJ/NOPB and LP38693MP-ADJ/NOPB are direct substitutes for the obsolete LP38693MPX-ADJ. The selection between these two active alternatives depends on procurement and assembly requirements:

LP38693MPX-ADJ/NOPB is supplied in Tape & Reel format, suitable for high-volume automated assembly operations. This part carries ROHS3 compliance certification, meeting current environmental regulations.

LP38693MP-ADJ/NOPB is supplied in Cut Tape and Digi-Reel format, appropriate for lower-volume production runs or manual assembly processes. This part also carries ROHS3 compliance certification.

Both substitute parts offer improved product status (Active) compared to the original obsolete part, ensuring long-term availability and supply chain stability. The upgrade from RoHS non-compliant to ROHS3 compliant status aligns with current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can LP38693MPX-ADJ/NOPB and LP38693MP-ADJ/NOPB be used interchangeably with LP38693MPX-ADJ?

A: Yes. All three parts share identical electrical specifications and mechanical compatibility. The differences are product status and packaging format. Both substitute parts are electrically and functionally equivalent.

Q: What is the primary reason to transition from LP38693MPX-ADJ to a substitute part?

A: The LP38693MPX-ADJ is classified as obsolete. Transitioning to LP38693MPX-ADJ/NOPB or LP38693MP-ADJ/NOPB ensures continued availability and supply chain reliability, as both alternatives maintain active product status.

Q: How do packaging formats differ between the substitute parts?

A: LP38693MPX-ADJ/NOPB is supplied in Tape & Reel format for automated high-volume assembly. LP38693MP-ADJ/NOPB is supplied in Cut Tape and Digi-Reel format for lower-volume or manual assembly processes. Both formats contain identical die and electrical performance.

Q: Are there compliance differences between the original and substitute parts?

A: Yes. The original LP38693MPX-ADJ is RoHS non-compliant. Both substitute parts (LP38693MPX-ADJ/NOPB and LP38693MP-ADJ/NOPB) are ROHS3 compliant, meeting current environmental and regulatory standards.

Q: What are the key electrical parameters that define substitution for this regulator?

A: Substitution is determined by matching output configuration (Positive), output type (Adjustable), voltage range (10V input max, 1.25V to 9V output), current rating (500mA), quiescent current (55 µA), control features (Enable), protection (Over Temperature), and operating temperature range (-40°C to 125°C).

Q: Is the SOT-223-5 package pinout identical across all three parts?

A: Yes. All three parts use the SOT-223-5 package with identical pin configuration (TO-261-5, TO-261AB), ensuring direct PCB compatibility without layout modifications.

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