LP2981AIM5-3.3/NOPBIn StockTexas Instruments
LP2981AIM5-3.3/NOPB is a micropower 100 mA ultra low-dropout LDO regulator in a compact SOT-23-5 package. It features a typical dropout voltage of only 0.2 V at full load with input voltage range of 4.3 V to 16 V. Ideal for battery-powered devices, portable electronics, and space-constrained designs requiring stable 3.3 V regulation.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LP2981AIM5-3.3/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 100 mA output current capability with ultra low-dropout voltage of only 0.2 V (typical), minimizing power loss
- Wide input voltage range from 4.3 V to 16 V, compatible with a broad range of power sources
- Compact SOT-23-5 package ideal for space-constrained PCB designs and portable applications
- Fixed 3.3 V output with tight regulation, suitable for microcontroller and sensor supply rails
- Lead-free (Pb-free) JESD-609 e3 compliant, meeting RoHS environmental requirements
Applications
The LP2981AIM5-3.3/NOPB is well-suited for battery-powered portable devices such as smartphones, wearables, and handheld instruments where low quiescent current and minimal dropout voltage extend battery life. It is also used in IoT sensor nodes and embedded systems requiring a stable 3.3 V supply rail from Li-ion or alkaline battery stacks. Additionally, its compact SOT-23-5 footprint makes it ideal for space-constrained designs including USB-powered accessories and point-of-load regulation on multi-rail PCBs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.375V |
| Dropout Voltage1-Nom | 0.2V |
| Input Voltage Absolute-Max | 16V |
| Input Voltage-Max | 16V |
| Input Voltage-Min | 4.3V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.0124% |
| Load Regulation-Max | 0.0016335% |
| 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 | 3.3825V |
| Output Voltage1-Min | 3.2175V |
| Output Voltage1-Nom | 3.3V |
| 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) | 30 |
| Voltage Tolerance-Max | 2.5% |
| ## LP2981AIM5-3.3/NOPB Alternates Showing results | Image |
| 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 |
| Country of Origin | Mainland China, Malaysia, Philippines |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LP2981AIM5-3.3/NOPB:
Frequently Asked Questions
What is the dropout voltage of the LP2981AIM5-3.3/NOPB at full load?
The LP2981AIM5-3.3/NOPB has a typical dropout voltage of 0.2 V and a maximum of 0.375 V at the full 100 mA output current. This ultra-low dropout characteristic allows operation with input voltages as low as 4.3 V while maintaining a regulated 3.3 V output.
What is the input voltage range supported by the LP2981AIM5-3.3/NOPB?
The LP2981AIM5-3.3/NOPB supports an input voltage range from 4.3 V minimum to 16 V maximum (absolute maximum 16 V). This wide range makes it compatible with single-cell Li-ion batteries, 5 V USB rails, and 12 V regulated supplies commonly used in industrial and consumer electronics.
What package does the LP2981AIM5-3.3/NOPB come in and what is its footprint?
The LP2981AIM5-3.3/NOPB is housed in a SOT-23-5 (5-pin small-outline transistor) package, also identified by JESD-30 code R-PDSO-G5. This compact surface-mount package has a very small PCB footprint, making it ideal for portable and space-constrained applications.
Is the LP2981AIM5-3.3/NOPB RoHS compliant?
Yes, the LP2981AIM5-3.3/NOPB is fully RoHS compliant. It is lead-free (Pb-free code: Yes) and meets JESD-609 Code e3 requirements, making it suitable for use in environmentally conscious product designs and markets that mandate halogen-free or lead-free components.
What are typical applications for the LP2981AIM5-3.3/NOPB?
The LP2981AIM5-3.3/NOPB is commonly used as a local 3.3 V power supply in battery-powered IoT devices, wearables, handheld instruments, and USB accessories. Its low quiescent current and ultra-low dropout voltage make it especially effective in energy-sensitive applications where extending battery runtime is critical.
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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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