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LP38693MPX-1.8 Equivalent & Substitute Parts
Part Overview
The LP38693MPX-1.8 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.8V output at 500mA in SOT-223-5 surface mount packaging. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part provides Enable control features and Over Temperature protection suitable for low-power applications requiring stable 1.8V regulation from input sources up to 10V.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Voltage (Fixed) | 1.8V |
| Output Current | 500mA |
| Input Voltage (Max) | 10V |
| Output Configuration | Positive |
| Number of Regulators | 1 |
| Package / Case | TO-261-5, TO-261AB |
| Supplier Device Package | SOT-223-5 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to 125°C |
| Control Features | Enable |
| Protection Features | Over Temperature |
Substitute Part Grouping Explanation
Substitution for the LP38693MPX-1.8 is determined by strict equivalence across the following critical parameters:
- Output voltage specification: 1.8V fixed
- Output current capability: 500mA
- Input voltage maximum rating: 10V
- Package type: SOT-223-5 (TO-261-5, TO-261AB)
- Surface mount configuration
- Enable control and Over Temperature protection features
- Operating temperature range: -40°C to 125°C
Two substitute parts meet these criteria: LP38693MPX-1.8/NOPB (direct manufacturer equivalent with NOPB designation) and LP38693MP-1.8/NOPB (parametric equivalent with different die marking). Both maintain identical electrical specifications and package compatibility.
Parameter Comparison
| Parameter | LP38693MPX-1.8 | LP38693MPX-1.8/NOPB | LP38693MP-1.8/NOPB |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active |
| Output Voltage | 1.8V | 1.8V | 1.8V |
| Output Current | 500mA | 500mA | 500mA |
| Input Voltage (Max) | 10V | 10V | 10V |
| Quiescent Current | 55 µA | 55 µA | 55 µA |
| PSRR | 55dB (120Hz) | 55dB (120Hz) | 55dB (120Hz) |
| 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 |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant |
| Packaging Type | Bulk | Tape & Reel (TR) | Tape & Reel (TR) |
Engineering Selection Recommendations
For new designs and procurement, LP38693MPX-1.8/NOPB is the primary substitute. This part maintains active product status with Texas Instruments and carries ROHS3 compliance certification, addressing regulatory requirements for modern manufacturing. The NOPB designation indicates lead-free construction, aligning with current environmental standards.
LP38693MP-1.8/NOPB serves as a secondary parametric equivalent with identical electrical performance and package compatibility. This variant also maintains active status and ROHS3 compliance.
The original LP38693MPX-1.8 (obsolete, non-compliant) should be replaced in active designs due to product discontinuation and lack of RoHS compliance. Both substitute parts provide equivalent functionality with improved compliance posture.
Frequently Asked Questions (FAQ)
Q: Can LP38693MPX-1.8/NOPB directly replace LP38693MPX-1.8 in existing designs?
A: Yes. Both parts share identical electrical specifications, output voltage (1.8V), output current (500mA), input voltage rating (10V), and SOT-223-5 package configuration. Pin-to-pin compatibility is maintained.
Q: What is the difference between LP38693MPX-1.8/NOPB and LP38693MP-1.8/NOPB?
A: Both are parametric equivalents with identical electrical performance and package type. The difference lies in die marking and internal construction. Both are active products with ROHS3 compliance. Selection between them depends on inventory availability and supplier preference.
Q: Why is the original LP38693MPX-1.8 marked as obsolete?
A: Texas Instruments has discontinued this part number. Substitute parts LP38693MPX-1.8/NOPB and LP38693MP-1.8/NOPB provide equivalent functionality with active product status and modern compliance certifications.
Q: Are there packaging differences between these parts?
A: The original LP38693MPX-1.8 was supplied in bulk packaging. Both substitute parts (LP38693MPX-1.8/NOPB and LP38693MP-1.8/NOPB) are supplied in Tape & Reel (TR) format, standard for automated assembly processes.
Q: What compliance certifications apply to the substitute parts?
A: Both LP38693MPX-1.8/NOPB and LP38693MP-1.8/NOPB carry ROHS3 compliance and REACH Unaffected status. The original part is RoHS non-compliant, making the substitutes necessary for designs requiring regulatory compliance.
Q: Are the operating temperature ranges identical across all three parts?
A: Yes. All three parts operate across -40°C to 125°C, maintaining thermal performance specifications for industrial and commercial applications.
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