Texas Instruments LP3891EMR
LP3891EMR variants from Texas Instruments
LP3891EMR Overview
What changes between part numbers, and what to check before you lock the BOM — Integrated Circuits (ICs).
LP3891EMR is a Texas Instruments order-code family — not a single orderable MPN. This page lists 2 variants that share the same core device but differ in suffix fields (package, grade, reel/tube, electrical bin, etc.). Pick the exact full part number; substituting within the family without checking the datasheet often causes assembly or spec mismatches.
Package: 8-PowerSOIC (0.154", 3.90mm Width) | Mounting Type: Surface Mount | Operating Temperature: -40°C ~ 125°C | Output Type: Fixed | Voltage Input Max: 5.5V | Supplier Device Package: 8-SO PowerPad Other listed variants describe: 1.2V LDO Regulator, 800mA, 1.5% Acc, 115mV Dropout, SOIC.
Across listed variants, watch these parameters: packages: 8-PowerSOIC (0.154", 3.90mm Width).
Suffix examples in this family: 1.8/NOPB, 1.2/NOPB. The characters after the base number usually encode package, temperature, or performance grade — compare the variant table column-by-column rather than assuming pin-compatible drops-in.
Example MPNs: LP3891EMR-1.8/NOPB, LP3891EMR-1.2/NOPB.
Key Features
- Footprint / package: 8-PowerSOIC (0.154", 3.90mm Width)Single package option across listed variants; still confirm reel vs tube suffix if you auto-insert.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 2 distinct suffix patternsExamples: 1.8/NOPB, 1.2/NOPB. Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Integrated Circuits (ICs) — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 2 LP3891EMR part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| LP3891EMR-1.8/NOPB | Package: 8-PowerSOIC (0.154", 3.90mm Width) | Mounting Type: Surface Mount | Operating Temperature: -40°C ~ 125°C | Output Type: Fixed | Voltage Input Max: 5.5V | Supplier Device Package: 8-SO PowerPad | 8-PowerSOIC (0.154", 3.90mm Width) | Texas Instruments | Active | Compliant | In Stock | |
| LP3891EMR-1.2/NOPB | 1.2V LDO Regulator, 800mA, 1.5% Acc, 115mV Dropout, SOIC | - | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LP3891EMR map to package, grade, and reel options.
LP3891EMR uses a shared prefix; characters after the prefix encode orderable options. Two lines with the same prefix are not drop-in replacements unless the differing columns match your need.
Suffixes seen here: 1.8/NOPB, 1.2/NOPB.
Full MPN examples: LP3891EMR-1.8/NOPB, LP3891EMR-1.2/NOPB.
Tip: photograph or copy the reel label — reel diameter, QTY per reel, and moisture sensitivity level (MSL) are often suffix-driven and won't show in the schematic.
How to Choose the Right LP3891EMR Integrated Circuits (ICs)
Match the footprint first
Packages here: 8-PowerSOIC (0.154", 3.90mm Width). Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LP3891EMR, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "LP3891EMR" — include the full suffix (e.g. 1.8/NOPB, 1.2/NOPB). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LP3891EMR product family
Identity
Variant Parameters
Source LP3891EMR with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the LP3891EMR product family.