Texas Instruments LP3855EMP-3.3/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $4.61 | $4.61 |
| 15+ | $4.46 | $66.90 |
| 25+ | $4.37 | $109.25 |
| 50+ | $4.12 | $206.00 |
| 100+ | $3.64 | $364.00 |
| N+ | $0.73 | 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) | 7V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.44V @ 1.5A |
| Current - Output | 1.5A |
| Current - Quiescent (Iq) | 3 mA |
| Current - Supply (Max) | 10 mA |
| PSRR | 73dB ~ 57dB (120Hz) |
| 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 | TO-261-5, TO-261AB |
| Supplier Device Package | SOT-223-5 |
| ROHS |  |
The LP3855EMP-3.3 from Texas Instruments is a fixed 3.3V low dropout linear regulator capable of delivering up to 1.5A. It features a low dropout voltage of 0.44V at full load and a high PSRR of 73dB at 120Hz, making it excellent for noise-sensitive applications. The SOT-223-5 package offers good thermal performance and ease of assembly. This regulator is well-suited for post-regulation and general-purpose 3.3V power supply needs.
- High Output Current: 1.5A capability supports power-hungry digital loads.
- Excellent PSRR: 73dB at 120Hz effectively filters input ripple and noise.
- Low Dropout: 0.44V dropout at 1.5A improves efficiency and allows lower input voltages.
- Robust Package: SOT-223-5 provides good thermal dissipation for high-current operation.
Post-Regulation for Switching Supplies
In systems with a noisy DC-DC converter, the LP3855 can provide a clean 3.3V rail. Its high PSRR (73dB at 120Hz) attenuates ripple and switching noise, ensuring clean power for sensitive loads.
FPGA and CPLD Core Supplies
Many FPGAs require a 3.3V I/O supply with high current. The LP3855's 1.5A capability and low dropout make it suitable for powering multiple I/O banks or a small core.
Networking Equipment
Routers and switches need reliable 3.3V for PHY chips and controllers. The SOT-223 package is easy to mount and the 1.5A current rating supports multiple ICs.
Industrial Automation
PLCs and motor controllers often use 3.3V logic. The LP3855 provides a robust, stable supply that can handle the current spikes common in industrial environments.
Test and Measurement
Bench instruments require low-noise power for accurate measurements. The high PSRR of this LDO helps maintain signal integrity in sensitive analog front-ends.
Consumer Electronics
Set-top boxes and gaming consoles use 3.3V for various peripherals. The LP3855's high current capability and thermal performance in SOT-223 make it a reliable choice.
- Q: What is the output voltage of the LP3855EMP-3.3?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.44V at a 1.5A load.
- Q: What is the quiescent current?
- A: The quiescent current is 3 mA.
- Q: What is the package type?
- A: It is available in a SOT-223-5 package.
LP3855EMP-3.3/NOPB.pdf
- Q: What is the output voltage of the LP3855EMP-3.3?
- A: The fixed output voltage is 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A of output current.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; please refer to the datasheet.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.44V at a 1.5A load.
- Q: What is the quiescent current?
- A: The quiescent current is 3 mA.
- Q: What is the package type?
- A: It is available in a SOT-223-5 package.
