LP3881EMR-1.8 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
LP3881EMR-1.8 is a 0.8A ultra-low dropout linear regulator from Texas Instruments, featuring 1.8V fixed output, 190mV max dropout voltage, and 5.5V max input. Ideal for portable and battery-powered applications requiring tight voltage regulation in a compact SO-8 package.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LP3881EMR-1.8 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low dropout voltage of only 190mV max (80mV typical) at full 0.8A load, extending battery life in portable designs
- Fixed 1.8V output with tight line regulation of 0.0006318%, ensuring stable supply for noise-sensitive digital and analog circuits
- Wide input voltage range from 1.99V to 5.5V (6V absolute max) supports single-cell Li-Ion and multi-cell alkaline battery systems
- Compact SOIC-8 (R-PDSO-G8) package enables space-efficient PCB layouts in handheld and wearable devices
Applications
The LP3881EMR-1.8 is well-suited for portable consumer electronics, IoT sensor nodes, and battery-powered instrumentation where minimizing voltage drop is critical. Its fixed 1.8V output and low quiescent current make it a natural choice for powering microcontrollers, FPGAs, and low-voltage digital logic in space-constrained designs. It also serves RF and wireless modules that demand a clean, stable 1.8V rail with minimal noise.
Specifications
| Reach Compliance Code | Unknown |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Max | 0.19V |
| Dropout Voltage1-Nom | 0.08V |
| Input Voltage Absolute-Max | 6V |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.99V |
| JESD-30 Code | R-PDSO-G8 |
| Line Regulation-Max | 0.0006318% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.8A |
| Output Voltage1-Max | 1.854V |
| Output Voltage1-Min | 1.746V |
| Output Voltage1-Nom | 1.8V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, LOW PROFILE |
| Packing Method | RAIL |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | CMOS |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 3% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| 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 dropout voltage of the LP3881EMR-1.8 at full load?
The LP3881EMR-1.8 has a typical dropout voltage of 80mV and a maximum of 190mV at the full 0.8A output current. This ultra-low dropout characteristic allows the regulator to maintain a stable 1.8V output even when the input voltage is only slightly higher, making it ideal for single-cell Li-Ion battery applications.
What is the input voltage range supported by the LP3881EMR-1.8?
The LP3881EMR-1.8 supports an input voltage range from 1.99V minimum to 5.5V maximum, with an absolute maximum rating of 6V. This wide range makes it compatible with a variety of power sources including single-cell Li-Ion batteries (3.0–4.2V), 3.3V rails, and 5V USB power supplies.
What package does the LP3881EMR-1.8 come in and what are its dimensions?
The LP3881EMR-1.8 is available in an 8-pin Small Outline IC (SOIC) package, designated JESD-30 code R-PDSO-G8. This surface-mount package offers a compact footprint suitable for high-density PCB designs in portable and embedded applications.
Can the LP3881EMR-1.8 output voltage be adjusted?
No, the LP3881EMR-1.8 has a fixed output voltage of 1.8V and is not adjustable. If you need a different output voltage, Texas Instruments offers other LP3881 variants with different fixed voltages, or the adjustable LP3881 versions that allow output voltage setting via external resistors.
What are typical applications for the LP3881EMR-1.8?
The LP3881EMR-1.8 is commonly used to power 1.8V logic in microcontrollers, FPGAs, DSPs, and wireless communication modules. Its ultra-low dropout and low noise make it suitable for battery-powered IoT devices, portable medical equipment, handheld test instruments, and any application requiring a clean, stable 1.8V supply with minimal power loss.
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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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