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LP2989IMM-3.0 Linear Voltage Regulator - Equivalent & Substitute Parts
Part Overview
The LP2989IMM-3.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This device delivers 500mA output current with a fixed 3V output and operates across an input voltage range up to 16V. The part is classified as obsolete, making identification of active equivalent alternatives essential for new designs and ongoing production support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Fixed) | 3V |
| Voltage - Input (Max) | 16V |
| Current - Output | 500mA |
| Voltage Dropout (Max) | 0.65V @ 500mA |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution for the LP2989IMM-3.0 is determined by strict equivalence across the following electrical and mechanical parameters:
- Fixed 3V output voltage
- 500mA maximum output current capability
- 16V maximum input voltage rating
- 0.65V maximum dropout voltage at 500mA
- 8-VSSOP package configuration (8-TSSOP, 8-MSOP form factor)
- Surface mount technology
- Enable control feature
- Over current, over temperature, and short circuit protection
The identified substitutes maintain identical electrical specifications and package dimensions, ensuring direct functional replacement in existing circuit designs.
Parameter Comparison
| Parameter | LP2989IMM-3.0 | LP2989AIMM-3.0/NOPB | LP2989IMM-3.0/NOPB |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Active | Active |
| Output Configuration | Positive | Positive | Positive |
| Output Type | Fixed | Fixed | Fixed |
| Voltage - Output (Fixed) | 3V | 3V | 3V |
| Voltage - Input (Max) | 16V | 16V | 16V |
| Current - Output | 500mA | 500mA | 500mA |
| Voltage Dropout (Max) | 0.65V @ 500mA | 0.65V @ 500mA | 0.65V @ 500mA |
| Current - Quiescent (Iq) | 175 µA | 175 µA | 175 µA |
| PSRR | 60dB (1kHz) | 60dB (1kHz) | 60dB (1kHz) |
| Control Features | Enable | Enable | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Both LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB are active product alternatives to the obsolete LP2989IMM-3.0. The primary distinction between these substitutes is product status and regulatory compliance.
LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB both carry ROHS3 compliance certification, whereas the original LP2989IMM-3.0 is RoHS non-compliant. For applications requiring RoHS compliance or long-term supply assurance, either active substitute is appropriate. Both parts are supplied in Tape & Reel packaging and maintain identical electrical performance and package geometry.
Frequently Asked Questions (FAQ)
Q: Can LP2989AIMM-3.0/NOPB or LP2989IMM-3.0/NOPB be used as direct replacements for LP2989IMM-3.0?
A: Yes. Both substitutes maintain identical electrical specifications, output voltage, current rating, dropout voltage, and package configuration. No circuit modifications are required for substitution.
Q: What is the difference between LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB?
A: Both parts are electrically and mechanically identical. The primary difference is product status and regulatory compliance. Both are active products with ROHS3 compliance. Selection between them depends on supplier availability and inventory.
Q: Why is the original LP2989IMM-3.0 listed as obsolete?
A: The original part is classified as obsolete by Texas Instruments. Active equivalents with improved compliance certifications are available as direct replacements.
Q: Are there any package or pinout differences between these parts?
A: No. All three parts use the 8-VSSOP package configuration (8-TSSOP, 8-MSOP form factor with 0.118" width, 3.00mm). Pinout and PCB footprint are identical.
Q: What certifications apply to the substitute parts?
A: Both LP2989AIMM-3.0/NOPB and LP2989IMM-3.0/NOPB are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.
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