LM2991T/NOPBIn StockTexas Instruments
LM2991T/NOPB is a negative adjustable linear voltage regulator by Texas Instruments, capable of supplying up to 500mA output current. Key specs: adjustable output voltage down to -1.2V, wide input voltage range, low dropout performance. From $2.59, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- LM2991T/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.5935(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable negative output voltage down to -1.2V for versatile power supply design
- Up to 500mA output current capability suitable for medium-load applications
- Low dropout voltage enabling efficient operation with minimal input-output differential
- Built-in current limiting and thermal shutdown protection for reliable operation
- Compatible with standard TO-220 package for easy PCB integration
Applications
The LM2991T/NOPB is widely used in split-supply analog circuits requiring a regulated negative voltage rail, such as op-amp systems, instrumentation amplifiers, and audio equipment. It is also employed in industrial power supplies, telecommunication equipment, and data acquisition systems where a stable negative voltage reference is essential. Its adjustable output and robust protection features make it a reliable choice for both laboratory prototyping and production designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 1V |
| Dropout Voltage1-Nom | 0.6V |
| Input Voltage-Max | 0.3V |
| Input Voltage-Min | 26V |
| JESD-30 Code | R-PSFM-T5 |
| JESD-609 Code | e3 |
| Line Regulation-Max (%/V) | 0.04 |
| Load Regulation-Max(%) | 0.4% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 1A |
| Output Voltage1-Max | 24V |
| Output Voltage1-Min | 3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP5,.1,67TB |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE NEGATIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 1.7mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output voltage range of the LM2991T/NOPB?
The LM2991T/NOPB provides an adjustable negative output voltage starting from -1.2V down to lower negative voltages, set by two external resistors. This flexibility makes it suitable for a wide range of analog circuit designs requiring a precise negative supply rail.
What is the maximum output current of the LM2991T/NOPB?
The LM2991T/NOPB can supply a maximum continuous output current of 500mA. This makes it appropriate for powering medium-load analog circuits, such as op-amps, signal conditioning stages, and sensor interfaces that require a stable negative voltage.
What package does the LM2991T/NOPB come in?
The LM2991T/NOPB is available in a TO-220 (3-pin) through-hole package, which offers excellent thermal dissipation. The TO-220 form factor is widely used and simplifies PCB layout and heatsink attachment for applications requiring sustained output current.
What are typical applications for the LM2991T/NOPB?
Typical applications include split-supply op-amp circuits, instrumentation amplifiers, audio preamplifiers, industrial power supplies, and data acquisition systems. The LM2991T/NOPB is ideal wherever a regulated, adjustable negative voltage rail is needed alongside a positive supply.
Does the LM2991T/NOPB include protection features?
Yes, the LM2991T/NOPB includes built-in current limiting and thermal shutdown protection. Current limiting prevents damage during overload conditions, while thermal shutdown automatically turns off the device if the junction temperature exceeds a safe threshold, ensuring long-term reliability.
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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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