Texas Instruments LP3873ES-3.3
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $5.63 | $5.63 |
| 15+ | $5.46 | $81.90 |
| 25+ | $5.34 | $133.50 |
| 50+ | $5.04 | $252.00 |
| 100+ | $4.45 | $445.00 |
| N+ | $0.89 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Tube | |
| Output Configuration | Obsolete |
| Output Type | Positive |
| Number of Regulators | Fixed |
| Voltage - Input (Max) | 7V |
| Voltage - Output (Min/Fixed) | 3.3V |
| 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-3.3 from National Semiconductor is a fixed 3.3V LDO regulator capable of delivering up to 3A. With a dropout voltage of just 1.2V at full load and high PSRR of 73dB at 120Hz, it provides clean, stable power for high-current digital and analog applications. The DDPAK/TO-263-5 package offers excellent thermal performance.
- High Output Current: 3A capability supports power-hungry FPGAs, ASICs, and multiple peripherals.
- Low Dropout: 1.2V at 3A enables efficient conversion from 5V rails.
- Excellent PSRR: 73dB at 120Hz filters mains ripple, ensuring clean 3.3V output.
- Robust Package: DDPAK/TO-263-5 provides superior thermal dissipation for continuous high-current operation.
High-Current 3.3V Rails
With 3A capability, this regulator powers multiple digital ICs, FPGAs, and ASICs from a single 5V supply, simplifying board design.
Automotive Engine Control Units
The DDPAK/TO-263-5 package handles high thermal loads, while 73dB PSRR at 120Hz rejects alternator noise for reliable 3.3V microcontroller operation.
Industrial Motor Drives
1.2V dropout at 3A allows operation from 4.5V rails, providing stable 3.3V for gate drivers and current sensing circuits in harsh environments.
Telecom Power Supplies
High current and 57dB PSRR at 120Hz make it suitable for line cards and base stations, ensuring clean 3.3V for DSPs and line drivers.
Medical Device Power
Stable 3.3V output with low noise supports patient monitoring systems, infusion pumps, and diagnostic equipment requiring reliable power.
Server and Storage Systems
3A output powers DDR memory termination and logic rails, while TO-263 package ensures efficient heat dissipation in dense racks.
- Q: What is the output voltage?
- A: This LDO provides a fixed output voltage of 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 3A of continuous current.
- Q: What is the input voltage range?
- A: The input voltage is 3.3V (fixed output type).
- Q: What is the dropout voltage?
- A: Dropout voltage is 1.2V at 3A load.
- Q: What is the quiescent current?
- A: Quiescent current is 9 mA.
- Q: What package is available?
- A: It comes in a DDPAK/TO-263-5 package.
LP3873ES-3.3.pdf
- Q: What is the output voltage?
- A: This LDO provides a fixed output voltage of 3.3V.
- Q: What is the maximum output current?
- A: It can deliver up to 3A of continuous current.
- Q: What is the input voltage range?
- A: The input voltage is 3.3V (fixed output type).
- Q: What is the dropout voltage?
- A: Dropout voltage is 1.2V at 3A load.
- Q: What is the quiescent current?
- A: Quiescent current is 9 mA.
- Q: What package is available?
- A: It comes in a DDPAK/TO-263-5 package.
