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LM2831XMF Equivalent & Substitute Parts
Part Overview
The LM2831XMF is a buck switching regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 1.5A output current with an adjustable output voltage range from 0.6V to 4.5V, operating from a 3V to 5.5V input supply. The device is packaged in SC-74A (SOT-753) surface mount configuration with a switching frequency of 1.6MHz.
The LM2831XMF is classified as obsolete. Locating direct equivalents becomes necessary for ongoing production support, maintenance applications, and design continuity where this specific part number is specified in existing schematics or bill of materials.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Function | Step-Down (Buck) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 3V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 0.6V |
| Voltage - Output (Max) | 4.5V |
| Current - Output | 1.5A |
| Frequency - Switching | 1.6MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C to 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
Substitute Part Grouping Explanation
Substitution of the LM2831XMF is determined by strict equivalence across the following critical parameters:
- Topology: Buck (step-down) switching regulator
- Output configuration: Positive adjustable
- Input voltage range: 3V to 5.5V
- Output voltage range: 0.6V to 4.5V
- Output current capability: 1.5A
- Switching frequency: 1.6MHz
- Package type: SC-74A (SOT-753) / SOT-23-5
- Mounting: Surface mount
- Operating temperature range: -40°C to 125°C
The LM2831XMF/NOPB is identified as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification.
Parameter Comparison
| Parameter | LM2831XMF | LM2831XMF/NOPB |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Function | Step-Down | Step-Down |
| Output Configuration | Positive | Positive |
| Output Type | Adjustable | Adjustable |
| Voltage - Input (Min) | 3V | 3V |
| Voltage - Input (Max) | 5.5V | 5.5V |
| Voltage - Output (Min/Fixed) | 0.6V | 0.6V |
| Voltage - Output (Max) | 4.5V | 4.5V |
| Current - Output | 1.5A | 1.5A |
| Frequency - Switching | 1.6MHz | 1.6MHz |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C |
| Package / Case | SC-74A, SOT-753 | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 | SOT-23-5 |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The LM2831XMF/NOPB is the direct functional equivalent of the LM2831XMF. Both parts share identical electrical specifications, switching characteristics, and physical packaging. The LM2831XMF/NOPB is currently in active production status, whereas the original LM2831XMF is obsolete.
For new designs or ongoing production requiring this regulator topology, the LM2831XMF/NOPB is the appropriate selection. This part carries ROHS3 compliance certification, meeting current environmental and regulatory requirements. Both parts maintain identical moisture sensitivity levels and REACH compliance status.
The "/NOPB" suffix indicates lead-free plating and RoHS compliance, representing the current manufacturing standard for this device family.
Frequently Asked Questions (FAQ)
Q: Can LM2831XMF/NOPB be used as a direct replacement for LM2831XMF?
A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The LM2831XMF/NOPB is the active production equivalent with current compliance certifications.
Q: What does the "/NOPB" suffix indicate?
A: The "/NOPB" designation indicates no-lead plating and RoHS3 compliance. This represents the current manufacturing standard for this device.
Q: Are there any package differences between these parts?
A: No. Both parts use the SC-74A (SOT-753) surface mount package with SOT-23-5 supplier device package designation. Pin configuration and PCB footprint are identical.
Q: Why is the original LM2831XMF listed as obsolete?
A: The LM2831XMF represents an earlier manufacturing variant. The LM2831XMF/NOPB supersedes it as the current production part with updated compliance certifications.
Q: Are the electrical specifications identical between both parts?
A: Yes. Input voltage range (3V to 5.5V), output voltage range (0.6V to 4.5V), output current (1.5A), switching frequency (1.6MHz), and operating temperature range (-40°C to 125°C) are identical.
Q: What is the inventory status for these parts?
A: LM2831XMF has 1913 pieces in stock. LM2831XMF/NOPB has 2491 pieces in stock as new original inventory.
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