National Semiconductor LP3873ES-2.5/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $12.16 | $12.16 |
| 15+ | $2.80 | $42.00 |
| 25+ | $2.74 | $68.50 |
| 50+ | $2.58 | $129.00 |
| 100+ | $2.28 | $228.00 |
| N+ | $0.46 | Price Inquiry |
Request Quote / Inquiry
| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 7V |
| Voltage - Output (Min/Fixed) | 2.5V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 1.2V @ 3A |
| Current - Output | 3A |
| Current - Quiescent (Iq) | 9 mA |
| Current - Supply (Max) | 15 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-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Supplier Device Package | TO-263 (DDPAK-5) |
| ROHS |  |
The LP3873ES-2.5/NOPB is a high-current, low dropout linear regulator from National Semiconductor, delivering a fixed 2.5V output at up to 3A. Its low 1.2V dropout voltage at full load and excellent 73dB PSRR make it suitable for post-regulation and noise-sensitive applications. Housed in a TO-263 (DDPAK-5) package, it offers robust thermal performance for demanding industrial and communication systems.
- High Output Current: 3A capability supports power-hungry digital cores and processors.
- Excellent Ripple Rejection: 73dB PSRR at 120Hz ensures clean output for sensitive analog circuits.
- Low Dropout Voltage: 1.2V dropout at 3A maximizes efficiency in low-headroom designs.
- Robust Thermal Package: TO-263 package dissipates heat effectively for reliable operation.
High-Current FPGA and DSP Core Supplies
The 3A output capability and 2.5V fixed output make it ideal for powering the core voltage of FPGAs and DSPs that require stable, low-noise power for reliable operation.
Post-Regulation for Switching Converters
With 73dB PSRR at 120Hz, this LDO effectively attenuates ripple from a preceding DC-DC converter, providing a clean analog supply rail for sensitive mixed-signal circuits.
Industrial Sensor and Actuator Power
The robust TO-263 package handles the thermal demands of industrial environments, delivering a stable 2.5V rail to precision sensors and actuators that need consistent voltage for accurate measurements.
Networking and Communication Equipment
In networking gear, the low dropout and high current capacity support line cards and processors that require tight voltage regulation during burst data transmission.
Battery-Powered Portable Instruments
Although quiescent current is 9mA, the low dropout allows efficient use of battery voltage down to near the output level, extending usable battery life in portable diagnostic tools.
Automotive Infotainment Processors
The 3A current rating supports modern infotainment processors, while the PSRR ensures clean power for audio and display subsystems, reducing noise-induced artifacts.
- Q: What is the output voltage of the LP3873ES-2.5/NOPB?
- A: The fixed output voltage is 2.5V.
- Q: What is the maximum output current?
- A: It can deliver up to 3A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage must be at least 2.5V plus the dropout voltage (1.2V @ 3A), so typically above 3.7V for full regulation.
- Q: What is the dropout voltage?
- A: The dropout voltage is 1.2V at a 3A load.
- Q: What is the quiescent current?
- A: The quiescent current is 9 mA.
- Q: What package is available?
- A: It comes in a TO-263 (DDPAK-5) package.
LP3873ES-2.5/NOPB.pdf
- Q: What is the output voltage of the LP3873ES-2.5/NOPB?
- A: The fixed output voltage is 2.5V.
- Q: What is the maximum output current?
- A: It can deliver up to 3A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage must be at least 2.5V plus the dropout voltage (1.2V @ 3A), so typically above 3.7V for full regulation.
- Q: What is the dropout voltage?
- A: The dropout voltage is 1.2V at a 3A load.
- Q: What is the quiescent current?
- A: The quiescent current is 9 mA.
- Q: What package is available?
- A: It comes in a TO-263 (DDPAK-5) package.
