Texas Instruments LP3991TL
LP3991TL variants from Texas Instruments
LP3991TL Overview
What changes between part numbers, and what to check before you lock the BOM — Integrated Circuits (ICs).
LP3991TL is a Texas Instruments order-code family — not a single orderable MPN. This page lists 6 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: 4-WFBGA, DSBGA | Operating Temperature: -40°C ~ 85°C | P S R R: 65dB (1kHz) | Output Type: Fixed | Current Quiescent Iq: 100 µA | Current Supply Max: 225 µA Other listed variants describe: 1.2V 300mA LDO, 1% Acc, 75mV Dropout, 4V In, SMT; 300-mA, low-dropout voltage regulator with enable 4-DSBGA -40 to 125.
Across listed variants, watch these parameters: packages: 4-WFBGA, DSBGA.
Suffix examples in this family: 1.8/NOPB, 1.2/NOPB, 1.5/NOPB, 1.7/NOPB, 2.0/NOPB, 2.8/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: LP3991TL-1.8/NOPB, LP3991TL-1.2/NOPB, LP3991TL-1.5/NOPB, LP3991TL-1.7/NOPB, LP3991TL-2.0/NOPB, LP3991TL-2.8/NOPB.
Key Features
- Footprint / package: 4-WFBGA, DSBGASingle 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.
- 6 distinct suffix patternsExamples: 1.8/NOPB, 1.2/NOPB, 1.5/NOPB, 1.7/NOPB, 2.0/NOPB (+1 more). 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 6 LP3991TL 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 |
|---|---|---|---|---|---|---|---|
| LP3991TL-1.8/NOPB | Package: 4-WFBGA, DSBGA | Operating Temperature: -40°C ~ 85°C | P S R R: 65dB (1kHz) | Output Type: Fixed | Current Quiescent Iq: 100 µA | Current Supply Max: 225 µA | 4-WFBGA, DSBGA | Texas Instruments | Active | Compliant | In Stock | |
| LP3991TL-1.2/NOPB | 1.2V 300mA LDO, 1% Acc, 75mV Dropout, 4V In, SMT | - | Texas Instruments | Active | Compliant | In Stock | |
| LP3991TL-1.5/NOPB | 300-mA, low-dropout voltage regulator with enable 4-DSBGA -40 to 125 | - | Texas Instruments | Active | Compliant | In Stock | |
| LP3991TL-1.7/NOPB | 300-mA, low-dropout voltage regulator with enable 4-DSBGA | - | Texas Instruments | Active | Compliant | In Stock | |
| LP3991TL-2.0/NOPB | 300-mA, low-dropout voltage regulator with enable 4-DSBGA | - | Texas Instruments | Active | Compliant | In Stock | |
| LP3991TL-2.8/NOPB | 2.8V 300mA LDO, 1% Acc, 75mV Dropout, 4V In, SM | - | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LP3991TL map to package, grade, and reel options.
LP3991TL 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, 1.5/NOPB, 1.7/NOPB, 2.0/NOPB, 2.8/NOPB.
Full MPN examples: LP3991TL-1.8/NOPB, LP3991TL-1.2/NOPB, LP3991TL-1.5/NOPB, LP3991TL-1.7/NOPB, LP3991TL-2.0/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 LP3991TL Integrated Circuits (ICs)
Match the footprint first
Packages here: 4-WFBGA, DSBGA. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LP3991TL, 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 "LP3991TL" — include the full suffix (e.g. 1.8/NOPB, 1.2/NOPB, 1.5/NOPB). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LP3991TL product family
Identity
Variant Parameters
Source LP3991TL with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 6 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 LP3991TL product family.