National Semiconductor LP38690DT-3.3
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $5.52 | $5.52 |
| 15+ | $1.27 | $19.05 |
| 25+ | $1.24 | $31.00 |
| 50+ | $1.17 | $58.50 |
| 100+ | $1.04 | $104.00 |
| N+ | $0.21 | 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) | 10V |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 55 µA |
| Current - Supply (Max) | 100 µA |
| PSRR | 55dB (120Hz) |
| Control Features | - |
| Protection Features | Over Temperature |
| Operating Temperature | -40°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-252-3, DPAK (2 Leads + Tab), SC-63 |
| Supplier Device Package | TO-252-3 |
| ROHS |  |
The LP38690DT-3.3 from National Semiconductor is a fixed 3.3V LDO regulator capable of 1A output current with a dropout of 1V. It features a low quiescent current of 55µA and 55dB PSRR at 120Hz. The TO-252-3 package ensures excellent thermal performance for high-current applications.
- High 1A output current supports power-hungry digital loads like FPGAs and processors.
- Low 55µA quiescent current reduces standby power in always-on systems.
- TO-252-3 package provides superior heat dissipation for sustained operation.
- 55dB PSRR at 120Hz filters mains hum, improving analog performance.
FPGA Core Supply
Delivers 1A at 3.3V for FPGA I/O banks, with 55dB PSRR at 120Hz reducing ripple from AC-DC converters.
Automotive Infotainment
Robust TO-252 package handles thermal demands of car audio and display systems, providing stable 3.3V logic rail.
Industrial Control
Powers PLC I/O modules and sensors with 1A capacity, ensuring reliable operation in noisy factory environments.
Networking Equipment
Supplies 3.3V for Ethernet switches and routers, with low quiescent current improving standby efficiency.
Battery Chargers
Regulates 3.3V for charging control logic in portable devices, with thermal shutdown protection.
Test & Measurement
Provides clean 3.3V for benchtop instruments, leveraging 55dB PSRR for accurate readings.
- Q: Output voltage?
- A: Fixed 3.3V.
- Q: Maximum current?
- A: 1A.
- Q: Input voltage range?
- A: Not specified; requires input >4.3V for regulation.
- Q: Dropout voltage?
- A: 1V at 1A load.
- Q: Quiescent current?
- A: 55µA.
- Q: Package?
- A: TO-252-3 (DPAK).
LP38690DT-3.3.pdf
- Q: Output voltage?
- A: Fixed 3.3V.
- Q: Maximum current?
- A: 1A.
- Q: Input voltage range?
- A: Not specified; requires input >4.3V for regulation.
- Q: Dropout voltage?
- A: 1V at 1A load.
- Q: Quiescent current?
- A: 55µA.
- Q: Package?
- A: TO-252-3 (DPAK).
