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LP2986IM-3.0/NOPB Equivalent & Substitute Parts
Part Overview
The LP2986IM-3.0/NOPB is a linear voltage regulator IC from Texas Instruments, classified as a Power Management (PMIC) component. It delivers a fixed positive 3V output at 200mA with a maximum dropout voltage of 0.35V. The device is currently in Active product status and is widely used in applications requiring low-noise, micropower regulation with integrated protection features.
Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or when transitioning to alternative manufacturer solutions while maintaining electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | LP2986IM-3.0/NOPB |
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Fixed) | 3V |
| Current - Output | 200mA |
| Voltage - Input (Max) | 16V |
| Voltage Dropout (Max) | 0.35V @ 200mA |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the LP2986IM-3.0/NOPB are identified based on the following critical parameters that determine functional compatibility:
- Fixed output voltage of 3V
- Output current capability of 200mA
- Maximum input voltage of 16V or greater
- Maximum dropout voltage of 0.35V or lower
- 8-SOIC surface mount package
- Operating temperature range of -40°C to 125°C
- Positive output configuration with fixed regulation
Parts meeting these electrical and mechanical specifications are classified as parametric equivalents. Parts with identical specifications but from alternative manufacturers are direct substitutes. Parts with restricted product status or design limitations are noted accordingly.
Parameter Comparison
| Parameter | LP2986IM-3.0/NOPB | LP2986AIM-3.0/NOPB | TPS7430D |
|---|---|---|---|
| Manufacturer | Texas Instruments | National Semiconductor | Texas Instruments |
| Output Voltage (Fixed) | 3V | 3V | 3V |
| Output Current | 200mA | 200mA | 200mA |
| Voltage - Input (Max) | 16V | 16V | 7V |
| Voltage Dropout (Max) | 0.35V @ 200mA | 0.35V @ 200mA | 0.35V @ 200mA |
| Current - Quiescent (Iq) | 120 µA | 120 µA | 115 µA |
| Current - Supply (Max) | 3.7 mA | 3.7 mA | 1.5 mA |
| PSRR | 65dB (1kHz) | 65dB (1kHz) | 55dB (100Hz) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Product Status | Active | Active | Not For New Designs |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
LP2986AIM-3.0/NOPB is a parametric equivalent with identical electrical specifications and package configuration. Both devices are Active status products with ROHS3 compliance. This part is suitable for direct substitution in all applications where the LP2986IM-3.0/NOPB is specified.
TPS7430D is a functional substitute with the same output voltage, current rating, dropout voltage, and package. However, this part carries a "Not For New Designs" product status designation. The maximum input voltage is limited to 7V compared to 16V for the primary part, and PSRR performance is reduced to 55dB at 100Hz versus 65dB at 1kHz. The TPS7430D is suitable only for legacy designs or applications where the 7V input maximum and reduced PSRR are acceptable. New designs should prioritize the LP2986IM-3.0/NOPB or LP2986AIM-3.0/NOPB.
Frequently Asked Questions (FAQ)
Q: Can LP2986AIM-3.0/NOPB replace LP2986IM-3.0/NOPB in existing designs?
A: Yes. Both parts share identical electrical specifications, package configuration, and operating temperature range. The LP2986AIM-3.0/NOPB is a direct parametric equivalent suitable for immediate substitution.
Q: What are the limitations of TPS7430D as a substitute?
A: The TPS7430D has a maximum input voltage of 7V, compared to 16V for the LP2986IM-3.0/NOPB. Applications requiring input voltages above 7V cannot use the TPS7430D. Additionally, the TPS7430D carries "Not For New Designs" status, making it unsuitable for new product development.
Q: Are all three parts pin-compatible?
A: All three parts use the 8-SOIC package with identical physical dimensions (0.154", 3.90mm width). Pin compatibility is confirmed for direct PCB substitution.
Q: Which part should be selected for new designs?
A: The LP2986IM-3.0/NOPB is the primary recommendation for new designs, as it maintains Active product status and full 16V input capability. The LP2986AIM-3.0/NOPB is an acceptable alternative with identical specifications.
Q: What is the difference in quiescent current between these parts?
A: The LP2986IM-3.0/NOPB and LP2986AIM-3.0/NOPB both draw 120 µA quiescent current. The TPS7430D draws 115 µA, a difference of 5 µA. For battery-powered applications with extended idle periods, this difference may be negligible.
Q: Are all parts RoHS compliant?
A: Yes. All three parts are ROHS3 compliant and suitable for applications requiring RoHS certification.
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