Texas Instruments LP38691DT-1.8
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $6.84 | $6.84 |
| 15+ | $1.57 | $23.55 |
| 25+ | $1.54 | $38.50 |
| 50+ | $1.45 | $72.50 |
| 100+ | $1.28 | $128.00 |
| N+ | $0.26 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Fixed |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 10V |
| Voltage - Output (Min/Fixed) | 1.8V |
| Voltage - Output (Max) | - |
| Voltage Dropout (Max) | - |
| Current - Output | 500mA |
| Current - Quiescent (Iq) | 100 µA |
| Current - Supply (Max) | - |
| PSRR | 55dB (120Hz) |
| Control Features | Enable |
| Protection Features | Over Temperature |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-252-3, DPAK (2 Leads + Tab), SC-63 |
| Supplier Device Package | TO-252 |
| ROHS |  |
The LP38691DT-1.8 from Texas Instruments is a fixed 1.8V low-dropout linear regulator capable of delivering 500mA. With a low quiescent current of 100µA and a PSRR of 55dB at 120Hz, it provides clean, efficient power for digital cores, memory interfaces, and portable electronics. The TO-252 package ensures robust thermal performance, making it a versatile choice for a wide range of low-voltage applications.
- High Current Capacity: 500mA output supports power-hungry digital loads like FPGAs and DSPs.
- Low Power Consumption: 100µA quiescent current helps extend battery life in portable devices.
- Stable Output: 55dB PSRR at 120Hz filters AC ripple, providing a clean 1.8V rail for sensitive electronics.
- Thermally Efficient Package: TO-252 package dissipates heat effectively, enabling reliable operation at maximum load.
FPGA Core Power Supplies
Modern FPGAs often require a 1.8V core supply. The LP38691DT-1.8 delivers up to 500mA with 55dB ripple rejection, ensuring stable core voltage for reliable logic operation in prototyping and production.
DDR Memory Termination
For DDR2/DDR3 memory systems, a clean 1.8V rail is essential. This LDO provides low-noise power for VDDQ, helping maintain signal integrity in high-speed digital designs.
Portable Audio Players
The low 100µA quiescent current and 1.8V output make it suitable for powering digital-to-analog converters and headphone amplifiers in battery-powered audio devices, preserving battery life.
Wireless IoT Modules
Many IoT SoCs operate at 1.8V I/O. This regulator can power the digital core or I/O banks of Wi-Fi and BLE modules, providing a stable supply from a 3.3V or 5V bus.
Set-Top Boxes and Media Players
Use the LP38691DT-1.8 to generate a dedicated 1.8V rail for HDMI interfaces or memory controllers in consumer electronics, ensuring compliance with interface voltage specifications.
Industrial Control Logic
In PLCs and industrial controllers, this LDO provides a reliable 1.8V supply for DSPs and microcontrollers, with the TO-252 package offering good heat dissipation for 500mA loads.
- Q: What is the output voltage?
- A: The LP38691DT-1.8 provides a fixed 1.8V output.
- Q: What is the maximum output current?
- A: It can deliver up to 500mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet.
- Q: What is the quiescent current?
- A: The quiescent current is 100µA.
- Q: What is the PSRR?
- A: PSRR is 55dB at 120Hz.
- Q: What package is available?
- A: It comes in a TO-252 (DPAK) package.
LP38691DT-1.8.pdf
- Q: What is the output voltage?
- A: The LP38691DT-1.8 provides a fixed 1.8V output.
- Q: What is the maximum output current?
- A: It can deliver up to 500mA.
- Q: What is the input voltage range?
- A: The input voltage range is not specified in the provided data; refer to the datasheet.
- Q: What is the quiescent current?
- A: The quiescent current is 100µA.
- Q: What is the PSRR?
- A: PSRR is 55dB at 120Hz.
- Q: What package is available?
- A: It comes in a TO-252 (DPAK) package.
