Texas Instruments LM2991T/LF03
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.03 | $3.03 |
| 15+ | $2.93 | $43.95 |
| 25+ | $2.87 | $71.75 |
| 50+ | $2.71 | $135.50 |
| 100+ | $2.39 | $239.00 |
| N+ | $0.48 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Tube | |
| Output Configuration | Negative |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | -26V |
| Voltage - Output (Min/Fixed) | -3V |
| Voltage - Output (Max) | -24V |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 0.7 mA |
| Current - Supply (Max) | 5 mA |
| PSRR | 60dB (1kHz) |
| Control Features | Enable |
| Protection Features | Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-220-5 Formed Leads |
| Supplier Device Package | TO-220-5 |
| ROHS |  |
The LM2991T/LF03 is a fixed -24V low dropout regulator from Texas Instruments, delivering up to 1A. With a dropout of 1V at full load and a quiescent current of 0.7 mA, it is designed for negative rail applications in industrial and audio systems. The TO-220-5 package ensures easy mounting and thermal performance.
- Negative Output (-24V): Specifically designed for negative rail applications, simplifying design.
- 1A Output Current: Sufficient for most analog and industrial loads.
- 60dB PSRR @ 1kHz: Excellent ripple rejection for clean power in sensitive circuits.
- Low Quiescent Current (0.7 mA): Minimizes power loss in always-on applications.
Negative Rail for Op-Amps
Provides a stable -24V rail for precision operational amplifiers in audio and instrumentation circuits, with 60dB PSRR at 1kHz to minimize supply noise.
Industrial Sensor Power
Regulates -24V for industrial sensors and transducers that require a clean negative supply for accurate signal conditioning.
Telecom Line Drivers
Supplies a regulated -24V for line drivers and interface circuits, ensuring consistent performance over temperature.
Audio Equipment Bias Supplies
Delivers a low-noise -24V bias for audio preamplifiers and mixers, leveraging the low quiescent current to reduce heat.
Test and Measurement Equipment
Provides a precise negative reference for multimeters, oscilloscopes, and other lab instruments requiring a stable -24V source.
Automotive Negative Supply
In automotive systems, it can generate a regulated negative voltage for sensors or display drivers, with 1A capability.
- Q: What is the output voltage of the LM2991T/LF03?
- A: It provides a fixed -24V output.
- Q: What is the maximum output current?
- A: The regulator can supply up to 1A of output current.
- Q: What is the input voltage range?
- A: The input voltage is -3V (negative supply).
- Q: What is the dropout voltage?
- A: Dropout is 1V at 1A load.
- Q: What is the quiescent current?
- A: Quiescent current is 0.7 mA.
- Q: What is the PSRR performance?
- A: PSRR is 60dB at 1kHz, providing good ripple rejection.
LM2991T/LF03.pdf
- Q: What is the output voltage of the LM2991T/LF03?
- A: It provides a fixed -24V output.
- Q: What is the maximum output current?
- A: The regulator can supply up to 1A of output current.
- Q: What is the input voltage range?
- A: The input voltage is -3V (negative supply).
- Q: What is the dropout voltage?
- A: Dropout is 1V at 1A load.
- Q: What is the quiescent current?
- A: Quiescent current is 0.7 mA.
- Q: What is the PSRR performance?
- A: PSRR is 60dB at 1kHz, providing good ripple rejection.
