National Semiconductor LP38843SX-1.2/NOPB
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $9.52 | $9.52 |
| 15+ | $2.19 | $32.85 |
| 25+ | $2.14 | $53.50 |
| 50+ | $2.02 | $101.00 |
| 100+ | $1.79 | $179.00 |
| N+ | $0.36 | 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) | 1.2V |
| 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 | TO-263 (DDPAK-5) |
| ROHS |  |
The LP38843SX-1.2/NOPB is a high-performance, fixed 1.2V low dropout linear regulator from National Semiconductor. It delivers up to 3A of output current with an ultra-low dropout voltage of just 0.5V at full load. The device features an exceptionally low quiescent current of 30 µA, making it ideal for battery-powered applications. With PSRR of 80dB at 120Hz and 65dB at 1kHz, it provides excellent noise rejection for sensitive analog and RF circuits. Available in a TO-263 (DDPAK-5) package.
- Ultra-Low Quiescent Current: 30 µA quiescent current extends battery life in portable and IoT devices.
- Very Low Dropout: 0.5V dropout at 3A allows efficient regulation from lower input voltages, reducing power dissipation.
- High PSRR: 80dB at 120Hz and 65dB at 1kHz ensures clean, noise-free output for sensitive electronics.
- High Current Density: 3A output in a TO-263 package provides a compact solution for high-power applications.
FPGA and CPLD Core Power
The 1.2V output at 3A is perfect for powering the core logic of modern FPGAs and CPLDs, which require tight voltage regulation and high transient current capability.
DSP and Microprocessor Supplies
With ultra-low dropout of 0.5V, this LDO can efficiently regulate from a 1.8V rail down to 1.2V, minimizing power loss in battery-powered portable devices.
Noise-Sensitive RF and Analog Circuits
The high PSRR of 80dB at 120Hz and 65dB at 1kHz makes it ideal for powering RF transceivers, PLLs, and precision analog-to-digital converters where supply noise directly impacts performance.
Battery-Powered IoT Devices
The 30 µA quiescent current significantly extends battery life in always-on IoT sensors and wearables, while still providing 3A for burst-mode wireless transmissions.
Networking and Communication Equipment
In routers and switches, this regulator provides a clean 1.2V rail for high-speed SerDes and PHY chips, ensuring signal integrity and reliable data transmission.
Industrial Control Systems
The TO-263 package with 5 leads offers good thermal performance for industrial controllers that require a stable 1.2V supply for microcontrollers and interface logic.
- Q: What is the output voltage of the LP38843SX-1.2?
- A: The fixed output voltage is 1.2V.
- Q: What is the maximum output current?
- A: It can provide up to 3A of output current.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.5V at a 3A load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 30 µA.
- Q: What is the PSRR performance?
- A: PSRR is 80dB at 120Hz and 65dB at 1kHz, providing excellent noise filtering.
- Q: What package is available?
- A: It is available in a TO-263 (DDPAK-5) package.
LP38843SX-1.2/NOPB.pdf
- Q: What is the output voltage of the LP38843SX-1.2?
- A: The fixed output voltage is 1.2V.
- Q: What is the maximum output current?
- A: It can provide up to 3A of output current.
- Q: What is the dropout voltage?
- A: The dropout voltage is very low at 0.5V at a 3A load.
- Q: What is the quiescent current?
- A: The quiescent current is extremely low at 30 µA.
- Q: What is the PSRR performance?
- A: PSRR is 80dB at 120Hz and 65dB at 1kHz, providing excellent noise filtering.
- Q: What package is available?
- A: It is available in a TO-263 (DDPAK-5) package.
