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LP38858SX-1.2/NOPB Equivalent & Substitute Parts
Part Overview
The LP38858SX-1.2/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 1.5A output current at a fixed 1.2V output voltage with a maximum dropout voltage of 0.18V at full load. The part is classified as Active product status and is suitable for applications requiring stable low-voltage power delivery with integrated protection features. Substitute parts may be required due to packaging availability, supply chain considerations, or specific form factor requirements while maintaining identical electrical performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Min/Fixed) | 1.2V |
| Voltage - Input (Max) | 5.5V |
| Current - Output | 1.5A |
| Voltage Dropout (Max) | 0.18V @ 1.5A |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the LP38858SX-1.2/NOPB is determined by strict equivalence across the following critical parameters:
- Output voltage specification: 1.2V fixed
- Maximum output current: 1.5A
- Maximum input voltage: 5.5V
- Package type: TO-263 (DDPAK-5)
- Mounting configuration: Surface Mount
- Regulatory compliance: ROHS3 Compliant
The LP38858S-1.2/NOPB qualifies as a direct substitute based on identical electrical specifications and package configuration. The only difference between these parts is the packaging format (Tape & Reel versus Tube), which does not affect electrical performance or mechanical compatibility in the application circuit.
Parameter Comparison
| Parameter | LP38858SX-1.2/NOPB | LP38858S-1.2/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Output Voltage (Fixed) | 1.2V | 1.2V |
| Output Current | 1.5A | 1.5A |
| Input Voltage (Max) | 5.5V | 5.5V |
| Dropout Voltage (Max) | 0.18V @ 1.5A | 0.18V @ 1.5A |
| Quiescent Current | 8.5 mA | 8.5 mA |
| PSRR | 80dB ~ 65dB (120Hz ~ 1kHz) | 80dB ~ 65dB (120Hz ~ 1kHz) |
| Protection Features | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) | Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO) |
| Package / Case | TO-263-6, D2PAK (5 Leads + Tab) | TO-263-6, D2PAK (5 Leads + Tab) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Packaging Format | Tape & Reel (TR) | Tube |
Engineering Selection Recommendations
Both LP38858SX-1.2/NOPB and LP38858S-1.2/NOPB are Active product status devices from Texas Instruments with identical electrical and thermal specifications. Selection between these parts should be based on packaging and supply requirements:
- LP38858SX-1.2/NOPB: Tape & Reel packaging suitable for automated assembly processes
- LP38858S-1.2/NOPB: Tube packaging suitable for manual assembly or lower-volume applications
Both parts maintain ROHS3 compliance and identical regulatory certifications (REACH Unaffected, ECCN EAR99). The electrical performance, thermal characteristics, and protection features are equivalent across both variants. PCB layout and circuit design remain unchanged when substituting between these parts.
Frequently Asked Questions (FAQ)
Q: Can LP38858S-1.2/NOPB be used as a direct replacement for LP38858SX-1.2/NOPB?
A: Yes. Both parts deliver identical electrical performance, output voltage, current capacity, and thermal specifications. The only difference is packaging format (Tube versus Tape & Reel), which does not affect circuit functionality or PCB compatibility.
Q: Are there any differences in the TO-263 package pinout between these parts?
A: No. Both parts use the TO-263-6 (D2PAK with 5 Leads + Tab) package configuration with identical pin assignments and mechanical dimensions.
Q: Do both parts support the same operating temperature range?
A: Yes. Both LP38858SX-1.2/NOPB and LP38858S-1.2/NOPB operate across -40°C to 125°C.
Q: What protection features are included in both substitute parts?
A: Both parts include Over Current, Over Temperature, Short Circuit, and Under Voltage Lockout (UVLO) protection.
Q: Are both parts RoHS compliant?
A: Yes. Both LP38858SX-1.2/NOPB and LP38858S-1.2/NOPB are ROHS3 Compliant.
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