National Semiconductor LM317T/LF01
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $3.60 | $3.60 |
| 15+ | $0.83 | $12.45 |
| 25+ | $0.81 | $20.25 |
| 50+ | $0.77 | $38.50 |
| 100+ | $0.68 | $68.00 |
| N+ | $0.14 | Price Inquiry |
Request Quote / Inquiry
| Product attributes | Property Value |
| Manufacturer | National Semiconductor |
| Product Series | |
| Packaging | Bulk | |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 37V |
| Voltage - Output (Min/Fixed) | 1.25V |
| Voltage - Output (Max) | 37V |
| Voltage Dropout (Max) | - |
| Current - Output | 1.5A |
| Current - Quiescent (Iq) | - |
| Current - Supply (Max) | - |
| PSRR | 64dB (120Hz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | 0°C ~ 125°C |
| Grade | - |
| Qualification | - |
| Mounting Type | Through Hole |
| Package / Case | TO-220-3 |
| Supplier Device Package | TO-220-3 |
| ROHS |  |
The LM317T/LF01 from National Semiconductor is a classic adjustable linear voltage regulator supporting output voltages from 1.25V to 37V with up to 1.5A of current. Housed in a TO-220-3 package, it offers excellent PSRR of 64dB at 120Hz, making it a preferred choice for audio, bench supplies, and industrial power designs. Its adjustable nature provides design flexibility across a wide range of applications.
- Adjustable Output (1.25V-37V): Flexible voltage setting with two external resistors, covering a wide range of applications.
- High Current Capacity (1.5A): Suitable for powering moderate-load circuits, motors, and amplifiers.
- Excellent PSRR (64dB @ 120Hz): Superior ripple rejection for clean, noise-free output in audio and precision analog circuits.
- Robust TO-220 Package: Excellent thermal dissipation for continuous high-current operation.
Adjustable Bench Power Supply
Provides a versatile 1.25V to 37V adjustable output at up to 1.5A, ideal for prototyping and lab equipment requiring variable voltage.
Battery Charger
Configured with external resistors, it can deliver a constant voltage for charging lead-acid or lithium batteries with current limiting.
Audio Amplifier Power Stage
With 64dB PSRR at 120Hz, it supplies clean, regulated power to audio preamplifiers and low-power amplifiers, reducing hum.
Precision Current Source
Using the adjustable output, it can be configured as a constant current source for LED drivers or sensor excitation.
Motherboard/Peripheral Supply
Regulates intermediate voltages in computing systems, providing stable rails for logic and interface circuits.
HVAC Control Boards
Powers microcontrollers and sensors in heating, ventilation, and air conditioning systems, with robust TO-220 thermal performance.
- Q: What is the output voltage range?
- A: The output voltage is adjustable from 1.25V up to 37V.
- Q: What is the maximum output current?
- A: The maximum output current is 1.5A.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly specified, but the device can handle up to 37V output, so input must be higher than output plus dropout.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified in the provided data, but typical LM317 dropout is around 2-3V.
- Q: What is the quiescent current?
- A: Quiescent current is not specified in the provided data.
- Q: What package is available?
- A: The device comes in a TO-220-3 package.
LM317T/LF01.pdf
- Q: What is the output voltage range?
- A: The output voltage is adjustable from 1.25V up to 37V.
- Q: What is the maximum output current?
- A: The maximum output current is 1.5A.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly specified, but the device can handle up to 37V output, so input must be higher than output plus dropout.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified in the provided data, but typical LM317 dropout is around 2-3V.
- Q: What is the quiescent current?
- A: Quiescent current is not specified in the provided data.
- Q: What package is available?
- A: The device comes in a TO-220-3 package.
