LP2981IM5-3.8/NOPB Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The LP2981IM5-3.8/NOPB is a 100mA ultra-low dropout linear regulator from Texas Instruments in a SOT23-5 package. Fixed 3.8V output with 375mV max dropout voltage and 16V input range. From $0.50 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LP2981IM5-3.8/NOPB Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low dropout voltage of 200mV typical (375mV max) enabling efficient power regulation close to output voltage
- Fixed 3.8V output with tight regulation across full load range up to 100mA continuous output current
- Compact SOT23-5 package with RoHS compliant NOPB designation for space-constrained portable designs
Applications
The LP2981IM5-3.8/NOPB is ideal for battery-powered portable devices requiring a stable 3.8V rail, such as smartphones, wearables, and IoT sensor nodes. Its ultra-low dropout characteristics maximize battery life by operating efficiently with minimal headroom. It is also well-suited for post-regulator filtering in multi-rail embedded systems.
Specifications
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.375V |
| Dropout Voltage1-Nom | 0.2V |
| Input Voltage Absolute-Max | 16V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 4.8V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0136% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.1A |
| Output Voltage1-Max | 3.933V |
| Output Voltage1-Min | 3.667V |
| Output Voltage1-Nom | 3.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Voltage Tolerance-Max | 3.5% |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LP2981IM5-3.8/NOPB:
Fixed Positive LDO Regulator, 3.3V, 0.375V Dropout, BIPolar, PDSO5
Frequently Asked Questions
What is the output voltage and maximum output current of the LP2981IM5-3.8/NOPB?
The LP2981IM5-3.8/NOPB provides a fixed 3.8V output and can supply up to 100mA of continuous output current. The dropout voltage is typically 200mV at full load, with a maximum of 375mV, allowing efficient operation even when the input supply is close to 3.8V.
What input voltage range does the LP2981IM5-3.8/NOPB support?
This regulator accepts an input voltage from 4.8V minimum up to 16V absolute maximum. The wide input range makes it compatible with a variety of power sources, including single-cell lithium-ion batteries with boost converters and standard 5V or 12V system rails.
Is the LP2981IM5-3.8/NOPB RoHS compliant and what package does it use?
Yes, the LP2981IM5-3.8/NOPB carries the NOPB (No Lead) designation confirming it is lead-free and RoHS/REACH compliant. It is housed in a compact SOT23-5 (5-pin TSOP) package, making it suitable for surface-mount assembly in high-density PCB designs.
What are common applications for the LP2981IM5-3.8/NOPB?
This LDO regulator is commonly used in portable electronics, IoT sensors, wireless modules, and wearable devices that require a stable 3.8V supply. Its low dropout voltage and small package make it an excellent choice for battery-powered applications where efficiency and board space are critical.
Are there pin-compatible alternatives to the LP2981IM5-3.8/NOPB?
Pin-compatible alternatives include other LP2981 series variants with different fixed output voltages in the same SOT23-5 footprint. Texas Instruments also offers the LP2985 series for higher output current up to 150mA. Always verify the target output voltage and dropout specifications when selecting a substitute.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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