LP38693MPX-3.3/NOPB Equivalent & Substitute Parts

Part Overview

The LP38693MPX-3.3/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive output of 3.3V at 500mA with a maximum dropout voltage of 0.55V. The device is housed in a SOT-223-5 package and is designed for surface mount applications. This part is currently in active production status. Substitute parts may be required due to packaging availability, inventory constraints, or specific supply chain requirements while maintaining identical electrical and mechanical performance.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	3.3V
Output Current	500mA
Input Voltage (Max)	10V
Dropout Voltage (Max)	0.55V @ 500mA
Quiescent Current	55 µA
PSRR	55dB (120Hz)
Operating Temperature Range	-40°C ~ 125°C
Package Type	SOT-223-5 (TO-261-5, TO-261AB)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LP38693MPX-3.3/NOPB are determined by equivalence across the following critical parameters:

Output voltage configuration (3.3V fixed positive output)
Output current capability (500mA)
Maximum input voltage (10V)
Dropout voltage specification (0.55V @ 500mA)
Quiescent current (55 µA)
PSRR performance (55dB at 120Hz)
Operating temperature range (-40°C ~ 125°C)
Package type (SOT-223-5)
Surface mount capability
Control features (Enable function)
Protection features (Over Temperature)
Regulatory compliance (ROHS3, REACH Unaffected)

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the main part number. Variations in packaging format (Cut Tape vs. Tape & Reel) and product status do not affect functional interchangeability.

Parameter Comparison

Parameter	LP38693MPX-3.3/NOPB	LP38693MP-3.3	LP38693MP-3.3/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	3.3V	3.3V	3.3V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	10V	10V	10V
Dropout Voltage (Max)	0.55V @ 500mA	0.55V @ 500mA	0.55V @ 500mA
Quiescent Current	55 µA	55 µA	55 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	SOT-223-5	SOT-223-5	SOT-223-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature	Over Temperature	Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Obsolete	Active
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

LP38693MP-3.3/NOPB is the primary substitute for LP38693MPX-3.3/NOPB. Both parts are in active production status, carry ROHS3 compliance, and are available in Cut Tape and Digi-Reel packaging formats. This part maintains the highest inventory availability (45,978 units) and is recommended for new designs and ongoing production requirements.

LP38693MP-3.3 is a secondary substitute option. While it maintains identical electrical specifications and SOT-223-5 package compatibility, this part is classified as obsolete and is available only in Tape & Reel format. Selection of this part should be limited to legacy system support or when Tape & Reel packaging is specifically required. Inventory availability is lower (1,994 units).

Both substitute parts are fully compliant with REACH regulations and carry unlimited moisture sensitivity level (MSL 1) ratings, ensuring compatibility with standard storage and handling procedures.

Frequently Asked Questions (FAQ)

Q: Are LP38693MP-3.3 and LP38693MP-3.3/NOPB electrically identical to the main part?

A: Yes. All three part numbers share identical electrical specifications including output voltage (3.3V), output current (500mA), dropout voltage (0.55V @ 500mA), quiescent current (55 µA), PSRR (55dB at 120Hz), and operating temperature range (-40°C ~ 125°C). They are functionally interchangeable in circuit design.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) & Digi-Reel® packaging is suitable for both manual and automated assembly processes with flexible quantity handling. Tape & Reel (TR) packaging is optimized for high-volume automated assembly lines. The electrical and mechanical specifications of the component remain unchanged regardless of packaging format.

Q: Why is LP38693MP-3.3 marked as obsolete?

A: Product status reflects Texas Instruments' manufacturing and support lifecycle. Obsolete status indicates the part is no longer in active production, though existing inventory may remain available. For new designs, LP38693MP-3.3/NOPB is the recommended choice due to its active status.

Q: Can I use these substitutes interchangeably in my PCB design?

A: Yes. All three part numbers use the identical SOT-223-5 package with the same pinout (TO-261-5, TO-261AB). No PCB layout modifications are required for substitution.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts carry identical ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent across all substitute options.

Q: Which part should I specify for a new production design?

A: LP38693MP-3.3/NOPB is the recommended choice for new designs. It maintains active production status, highest inventory availability, and is available in standard Cut Tape and Digi-Reel packaging formats suitable for both manual and automated assembly.

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