Texas Instruments LP2981A-50DBVR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.59 | $0.59 |
| 15+ | $0.57 | $8.55 |
| 25+ | $0.56 | $14.00 |
| 50+ | $0.53 | $26.50 |
| 100+ | $0.47 | $47.00 |
| N+ | $0.09 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 16V |
| Voltage - Output (Min/Fixed) | 5V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.37V @ 100mA |
| Current - Output | 100mA |
| Current - Quiescent (Iq) | 95 µA |
| Current - Supply (Max) | 1.7 mA |
| PSRR | 63dB (1kHz) |
| Control Features | Enable |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | SC-74A, SOT-753 |
| Supplier Device Package | SOT-23-5 |
| ROHS |  |
The LP2981A-50DBVR from Texas Instruments is a fixed 5V LDO regulator delivering 100mA. With an ultra-low dropout of 0.37V and quiescent current of 95µA, it excels in battery-powered and automotive applications. The SOT-23-5 package offers a compact footprint for space-limited designs.
- Ultra-Low Dropout: 0.37V at 100mA allows operation with minimal input-output headroom.
- Low Quiescent Current: 95µA extends battery life in portable devices.
- Wide Input Range: Accepts up to 16V, suitable for automotive and industrial supplies.
- High PSRR: 63dB at 1kHz rejects high-frequency noise for clean digital power.
Battery-Powered Microcontrollers
The 95µA quiescent current and 0.37V dropout make it ideal for 5V MCU systems running from Li-ion batteries, maximizing usable battery capacity.
Automotive ECUs
With an input range up to 16V, it can regulate vehicle battery voltage (12V) down to a stable 5V for sensors and control logic.
Portable Medical Devices
For glucose monitors and pulse oximeters, the low dropout ensures stable 5V output even as batteries discharge, maintaining measurement accuracy.
Industrial Sensor Nodes
In factory automation, this LDO provides a clean 5V rail for digital sensors and transceivers, with 63dB PSRR at 1kHz filtering switching noise.
USB-Powered Peripherals
When powered from a 5V USB bus, the low dropout allows operation even with slight voltage drops in cables, ensuring reliable peripheral performance.
- Q: What is the output voltage of the LP2981A-50DBVR?
- A: It provides a fixed positive output of 5V.
- Q: What is the maximum output current?
- A: The maximum output current is 100mA.
- Q: What is the input voltage range?
- A: The input voltage should be between 5.37V and 16V for proper regulation.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.37V typical at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 95µA, making it suitable for battery applications.
- Q: What is the package type?
- A: It comes in a SOT-23-5 surface-mount package.
LP2981A-50DBVR.pdf
- Q: What is the output voltage of the LP2981A-50DBVR?
- A: It provides a fixed positive output of 5V.
- Q: What is the maximum output current?
- A: The maximum output current is 100mA.
- Q: What is the input voltage range?
- A: The input voltage should be between 5.37V and 16V for proper regulation.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.37V typical at 100mA load.
- Q: What is the quiescent current?
- A: The quiescent current is 95µA, making it suitable for battery applications.
- Q: What is the package type?
- A: It comes in a SOT-23-5 surface-mount package.
