Texas Instruments LP2981A
LP2981A variants from Texas Instruments
LP2981A Overview
What changes between part numbers, and what to check before you lock the BOM — general-purpose circuits.
Key Features
- Footprint / package: SOT-23Single 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.
- 8 distinct suffix patternsExamples: 30DBVTE4, 28DBVT, 29DBVR, 30DBVRG4, 30DBVTG4 (+3 more). Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- general-purpose circuits — 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 8 LP2981A 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 |
|---|---|---|---|---|---|---|---|
| LP2981A-30DBVTE4 | Package: SOT-23 | Max Supply Voltage: 16V | Min Supply Voltage: 2.2V | Output Voltage: 3V | Output Current: 100mA | Max Output Current: 100mA | Max Input Voltage: 16V | Number of Outputs: 1 | SOT-23 | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-28DBVT | 100mA 2.8V LDO, 16V In, 1% Acc, SOT-23-5 | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-29DBVR | 2.9V 100mA LDO Linear Regulator, SOT-23-5, 16V In, 1% Acc | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-30DBVRG4 | 100-mA, 16-V, low-dropout voltage regulator with high-accuracy & enable 5-SOT-23 -40 to 125 | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-30DBVTG4 | 100-mA, 16-V, low-dropout voltage regulator with high-accuracy & enable 5-SOT-23 -40 to 125 | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-33DBVR | 3.3V LDO Regulator, 100mA, 16V In, 1% Acc, SOT-23 | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-50DBVR | 5V LDO Regulator, 100mA, 16V In, SOT-23, 1% Acc | - | Texas Instruments | Active | Compliant | In Stock | |
| LP2981A-50DBVT | 5V LDO Regulator, 100mA, 16V In, 1% Acc, SOT-23 | - | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LP2981A map to package, grade, and reel options.
How to Choose the Right LP2981A Variant
Match the footprint first
Packages here: SOT-23. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LP2981A, 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 "LP2981A" — include the full suffix (e.g. 30DBVTE4, 28DBVT, 29DBVR). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LP2981A product family
Identity
Variant Parameters
Source LP2981A with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 8 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 LP2981A product family.