LP38693MPX-3.3 Equivalent & Substitute Parts

Part Overview

The LP38693MPX-3.3 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3.3V output applications with 500mA current capacity. This Surface Mount device in SOT-223-5 package is classified as Obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications. The part provides Enable control features and Over Temperature protection, suitable for low-dropout regulation in embedded systems and power management circuits.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Output Voltage (Fixed)	3.3V
Output Current	500mA
Input Voltage (Max)	10V
Voltage Dropout (Max)	0.55V @ 500mA
Quiescent Current	55 µA
PSRR	55dB (120Hz)
Control Features	Enable
Protection Features	Over Temperature
Operating Temperature Range	-40°C ~ 125°C
Package Type	SOT-223-5 (TO-261-5, TO-261AB)
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP38693MPX-3.3 is determined by strict electrical and mechanical parameter matching across the LP38693 product family. All substitute parts maintain identical electrical specifications: 3.3V fixed output, 500mA output current, 10V maximum input voltage, 0.55V maximum dropout voltage at 500mA, 55 µA quiescent current, and 55dB PSRR at 120Hz. All parts feature Enable control and Over Temperature protection with identical operating temperature range (-40°C to 125°C). Package compatibility is maintained across all variants through the SOT-223-5 supplier device package designation. Substitution eligibility is further determined by product status (Active vs. Obsolete) and RoHS compliance certification status.

Parameter Comparison

Parameter	LP38693MPX-3.3	LP38693MP-3.3	LP38693MP-3.3/NOPB	LP38693MPX-3.3/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Output Voltage	3.3V	3.3V	3.3V	3.3V
Output Current	500mA	500mA	500mA	500mA
Input Voltage (Max)	10V	10V	10V	10V
Voltage Dropout (Max)	0.55V @ 500mA	0.55V @ 500mA	0.55V @ 500mA	0.55V @ 500mA
Quiescent Current	55 µA	55 µA	55 µA	55 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Control Features	Enable	Enable	Enable	Enable
Protection Features	Over Temperature	Over Temperature	Over Temperature	Over Temperature
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	SOT-223-5	SOT-223-5	SOT-223-5	SOT-223-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For new designs and production applications, LP38693MP-3.3/NOPB and LP38693MPX-3.3/NOPB are the preferred substitutes due to Active product status and ROHS3 compliance certification. Both parts maintain full electrical and mechanical compatibility with the original LP38693MPX-3.3 specification while offering superior compliance posture for modern manufacturing environments.

LP38693MP-3.3 serves as an intermediate substitute option, providing ROHS3 compliance with Obsolete product status. This part is suitable for legacy system maintenance where component availability is constrained.

The original LP38693MPX-3.3 is RoHS non-compliant and Obsolete. Direct replacement with an Active, ROHS3-compliant variant is recommended for all new procurement and design revisions.

Frequently Asked Questions (FAQ)

Q: Are all LP38693 variants electrically interchangeable? A: Yes. LP38693MPX-3.3, LP38693MP-3.3, LP38693MP-3.3/NOPB, and LP38693MPX-3.3/NOPB share identical electrical specifications including 3.3V output, 500mA current capacity, 0.55V dropout voltage, and all control and protection features. Substitution is valid based on electrical parameters alone.

Q: What is the difference between the MPX and MP designations? A: The MPX and MP designations represent different manufacturing process nodes within the LP38693 family. Both maintain identical electrical performance and package compatibility in SOT-223-5. The designations do not affect functional substitutability.

Q: Why is the /NOPB suffix important? A: The /NOPB suffix indicates lead-free, RoHS-compliant manufacturing. Parts with this designation (LP38693MP-3.3/NOPB and LP38693MPX-3.3/NOPB) meet ROHS3 compliance requirements, making them suitable for regulated markets and modern supply chains. The original LP38693MPX-3.3 without this suffix is RoHS non-compliant.

Q: Can I use an Active product to replace an Obsolete product? A: Yes. Active products (LP38693MP-3.3/NOPB and LP38693MPX-3.3/NOPB) are direct replacements for Obsolete variants. Active status indicates ongoing manufacturing and supply availability, making these parts more reliable for long-term production.

Q: Are packaging options different between these parts? A: All variants use SOT-223-5 package (TO-261-5, TO-261AB) for Surface Mount applications. Packaging differences exist only in distribution format (Tape & Reel vs. Cut Tape & Digi-Reel), which does not affect electrical or mechanical compatibility on the PCB.

Q: What is the Moisture Sensitivity Level significance? A: All LP38693 variants carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage or handling, simplifying supply chain management.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message