National Semiconductor LP38843SX-1.5
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $8.80 | $8.80 |
| 15+ | $2.02 | $30.30 |
| 25+ | $1.98 | $49.50 |
| 50+ | $1.87 | $93.50 |
| 100+ | $1.65 | $165.00 |
| N+ | $0.33 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output (Min/Fixed) | 1.5V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 0.5V @ 3A |
| Current - Output | 3A |
| Current - Quiescent (Iq) | 30 µA |
| Current - Supply (Max) | 40 mA |
| PSRR | 80dB ~ 65dB (120Hz ~ 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 | TO-263-6, D2PAK (5 Leads + Tab), TO-263BA |
| Supplier Device Package | DDPAK/TO-263-5 |
The LP38843SX-1.5 from National Semiconductor is a high-current LDO linear regulator delivering a fixed 1.5V output at up to 3A. It features an ultra-low quiescent current of 30 µA and a dropout voltage of just 0.5V at full load. With excellent PSRR of 80dB at 120Hz, it ensures clean power for noise-sensitive applications. The DDPAK/TO-263-5 package provides superior thermal dissipation for demanding environments.
- High Current Capacity: 3A output supports power-hungry processors and FPGAs.
- Ultra-Low Quiescent Current: 30 µA IQ minimizes standby power, ideal for battery-backed systems.
- Excellent Noise Rejection: 80dB PSRR at 120Hz filters mains ripple for clean DC output.
- Low Dropout: 0.5V dropout at 3A reduces power dissipation and improves efficiency.
High-Current FPGA Core Supplies
With 3A capability and 0.5V dropout, it efficiently powers modern FPGA cores requiring 1.5V from 2.5V or 3.3V rails.
Server Motherboard VRMs
The low 30 µA quiescent current and high current capacity make it ideal for always-on server power rails, reducing standby power.
Telecom Base Station DSPs
Its 80dB PSRR at 120Hz filters rectified AC noise, providing clean 1.5V supply for high-performance DSPs in base stations.
Automotive ADAS Processors
The DDPAK package handles thermal stress in engine compartments, delivering stable 1.5V to vision processors and radar modules.
Industrial Motor Control
Provides robust 1.5V for microcontroller cores in variable frequency drives, ensuring reliable operation in noisy industrial environments.
High-End Audio DACs
The low noise and high PSRR (65dB at 1kHz) ensure pristine power for audiophile-grade digital-to-analog converters.
- Q: What is the output voltage of the LP38843SX-1.5?
- A: It provides a fixed 1.5V output voltage.
- Q: What is the maximum output current?
- A: The LP38843 can deliver up to 3A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage must be at least 1.5V above the output (i.e., 3.0V for 1.5V out); refer to datasheet for maximum.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.5V at 3A load, enabling efficient low-headroom operation.
- Q: What is the quiescent current?
- A: The quiescent current is very low at 30 µA, ideal for power-sensitive applications.
- Q: What package is used?
- A: It comes in a DDPAK/TO-263-5 package, suitable for high-current applications with good thermal performance.
LP38843SX-1.5.pdf
- Q: What is the output voltage of the LP38843SX-1.5?
- A: It provides a fixed 1.5V output voltage.
- Q: What is the maximum output current?
- A: The LP38843 can deliver up to 3A of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage must be at least 1.5V above the output (i.e., 3.0V for 1.5V out); refer to datasheet for maximum.
- Q: What is the dropout voltage?
- A: The dropout voltage is 0.5V at 3A load, enabling efficient low-headroom operation.
- Q: What is the quiescent current?
- A: The quiescent current is very low at 30 µA, ideal for power-sensitive applications.
- Q: What package is used?
- A: It comes in a DDPAK/TO-263-5 package, suitable for high-current applications with good thermal performance.
