LP38693MPX-2.5 Equivalent & Substitute Parts

Part Overview

The LP38693MPX-2.5 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 2.5V output applications with 500mA current capacity in SOT-223-5 surface mount packaging. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. Active alternatives with identical electrical and mechanical specifications are available to ensure uninterrupted supply chain access.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	2.5V
Output Current	500mA
Input Voltage (Max)	10V
Voltage Dropout (Max)	0.73V @ 500mA
Quiescent Current	55 µA
PSRR	55dB (120Hz)
Operating Temperature Range	-40°C to 125°C
Package Type	SOT-223-5 (TO-261-5, TO-261AB)
Mounting Type	Surface Mount
Control Features	Enable
Protection Features	Over Temperature

Substitute Part Grouping Explanation

Substitution of the LP38693MPX-2.5 is determined by strict equivalence across the following critical parameters:

Output voltage specification: 2.5V fixed
Output current rating: 500mA
Input voltage maximum: 10V
Voltage dropout characteristics: 0.73V @ 500mA
Package configuration: SOT-223-5
Quiescent current: 55 µA
PSRR performance: 55dB (120Hz)
Operating temperature range: -40°C to 125°C
Control and protection features: Enable function and Over Temperature protection

The identified substitute parts maintain complete parametric equivalence with the main part number across all electrical and mechanical specifications. Substitutes differ only in product status (Active vs. Obsolete) and RoHS compliance certification level.

Parameter Comparison

Parameter	LP38693MPX-2.5	LP38693MPX-2.5/NOPB	LP38693MP-2.5/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active
Output Voltage	2.5V	2.5V	2.5V
Output Current	500mA	500mA	500mA
Input Voltage (Max)	10V	10V	10V
Voltage Dropout (Max)	0.73V @ 500mA	0.73V @ 500mA	0.73V @ 500mA
Quiescent Current	55 µA	55 µA	55 µA
PSRR	55dB (120Hz)	55dB (120Hz)	55dB (120Hz)
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Control Features	Enable	Enable	Enable
Protection Features	Over Temperature	Over Temperature	Over Temperature
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both LP38693MPX-2.5/NOPB and LP38693MP-2.5/NOPB are direct substitutes for the obsolete LP38693MPX-2.5. Selection between active alternatives should prioritize:

Product Status: LP38693MPX-2.5/NOPB and LP38693MP-2.5/NOPB are both Active products, ensuring long-term availability and manufacturing support compared to the Obsolete status of the original part number.

Compliance Certification: Both substitute parts carry ROHS3 Compliant certification, meeting current regulatory requirements. The original LP38693MPX-2.5 is RoHS non-compliant, making the substitutes preferable for new designs and applications subject to RoHS directives.

Packaging Format: LP38693MPX-2.5/NOPB is supplied in Tape & Reel (TR) format, suitable for automated assembly operations. LP38693MP-2.5/NOPB is also supplied in Tape & Reel format, supporting high-volume production environments.

Inventory Availability: LP38693MPX-2.5/NOPB maintains 2200 pieces in stock, while LP38693MP-2.5/NOPB maintains 2969 pieces in stock, providing robust supply chain access for both alternatives.

Frequently Asked Questions (FAQ)

Q: Can LP38693MPX-2.5/NOPB directly replace LP38693MPX-2.5 in existing designs?

A: Yes. LP38693MPX-2.5/NOPB is a direct substitute with identical electrical specifications, output voltage, current rating, package type (SOT-223-5), and operating temperature range. No circuit modifications are required.

Q: What is the difference between LP38693MPX-2.5/NOPB and LP38693MP-2.5/NOPB?

A: Both parts are parametrically equivalent across all electrical and mechanical specifications. The difference lies in the part number designation and manufacturing batch coding. Both are Active products with ROHS3 compliance and identical performance characteristics.

Q: Why is the original LP38693MPX-2.5 marked as Obsolete?

A: Obsolete status indicates the part is no longer in active production. Active alternatives with identical specifications are available to ensure design continuity and supply chain reliability.

Q: Are there any compatibility concerns when switching from LP38693MPX-2.5 to the substitute parts?

A: No compatibility concerns exist. Both substitute parts maintain identical package configuration (SOT-223-5), pinout, electrical performance, and thermal characteristics. Direct PCB footprint compatibility is confirmed.

Q: What is the significance of the "/NOPB" suffix in the substitute part numbers?

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free), meeting RoHS3 compliance requirements. This is standard for current production parts from Texas Instruments.

Q: Which substitute part should be selected for new designs?

A: Either LP38693MPX-2.5/NOPB or LP38693MP-2.5/NOPB is suitable for new designs. Selection may be based on inventory availability, supplier preference, or procurement lead times, as both parts are functionally and parametrically identical.

Q: Are the substitute parts suitable for the full operating temperature range of -40°C to 125°C?

A: Yes. Both substitute parts are rated for the complete operating temperature range of -40°C to 125°C, matching the original part specification.

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