LP2981A-33DBVTE4In StockTexas Instruments
LP2981A-33DBVTE4 is a 100mA fixed 3.3V LDO linear voltage regulator with 0.75% accuracy and 0.2V typical dropout. Features ultra-low quiescent current and SOT-23-5 package for space-constrained designs. From $0.36 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LP2981A-33DBVTE4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3617(MOQ 480)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 100mA output current with only 0.2V typical dropout voltage, enabling efficient low-voltage operation
- Fixed 3.3V output with tight 0.75% accuracy for precision power rails
- Wide 2.2V to 16V input voltage range accommodates diverse supply configurations
- SOT-23-5 (5-pin) package ideal for space-constrained portable and IoT applications
- Low quiescent current extends battery life in handheld and wearable devices
Applications
The LP2981A-33DBVTE4 is well-suited for powering microcontrollers, sensors, and wireless modules in portable electronics, IoT edge nodes, and battery-powered consumer devices where a clean, stable 3.3V rail is required. Its compact SOT-23-5 footprint and wide input range make it a natural fit for wearables, handheld instruments, and automotive infotainment sub-circuits. It also serves as a post-regulator or point-of-load supply in industrial sensor nodes and medical portable equipment.
Specifications
| 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 | 2.2V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Line Regulation-Max | 0.0124% |
| 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 | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Tolerance-Max | 2.5% |
| 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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output voltage and accuracy of the LP2981A-33DBVTE4?
The LP2981A-33DBVTE4 provides a fixed 3.3V regulated output with a maximum accuracy of 0.75%, ensuring the output stays within ±24.75mV across line, load, and temperature variations — suitable for precision digital and analog circuitry.
What input voltage range does the LP2981A-33DBVTE4 support?
The device accepts an input voltage from 2.2V minimum up to 16V absolute maximum, with a recommended operating maximum of 16V. This wide range allows it to be powered from a variety of sources including single-cell Li-ion, 5V USB, and 12V automotive or industrial rails.
What is the dropout voltage of the LP2981A-33DBVTE4 and why does it matter?
The typical dropout voltage is 0.2V, with a maximum of 0.375V at full 100mA load. Low dropout means the input supply only needs to be 0.375V above 3.3V (i.e., 3.675V) in the worst case, making it efficient for battery-powered designs where input voltage is close to the regulated output.
What package does the LP2981A-33DBVTE4 use and what does the 'DBVT' suffix indicate?
The LP2981A-33DBVTE4 comes in a SOT-23 5-pin (DBVT) surface-mount package. The 'E4' suffix denotes RoHS-compliant, lead-free finish (Sn-Ag-Cu). The compact SOT-23-5 footprint minimizes PCB area, making it suitable for space-constrained portable and wearable designs.
What are common applications for the LP2981A-33DBVTE4?
Typical applications include powering microcontrollers (e.g., STM32, nRF52), Bluetooth/Wi-Fi modules, MEMS sensors, and display drivers in IoT devices, wearables, handheld instruments, and automotive infotainment sub-systems that require a low-noise, stable 3.3V supply rail.
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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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