Texas Instruments LM317KCSE3
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.79 | $0.79 |
| 15+ | $0.76 | $11.40 |
| 25+ | $0.75 | $18.75 |
| 50+ | $0.71 | $35.50 |
| 100+ | $0.62 | $62.00 |
| N+ | $0.12 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Tube | |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.25V |
| Voltage - Output (Max) | 37V |
| Voltage Dropout (Max) | - |
| Current - Output | 1.5A |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | - |
| PSRR | 80dB ~ 65dB (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 LM317KCSE3 from Texas Instruments is a classic adjustable linear regulator offering an output range from 1.25V to 37V with up to 1.5A of current. Its robust TO-220 package handles significant power dissipation, while the 80dB PSRR at 120Hz ensures clean output for audio and precision circuits. The 10 mA quiescent current is typical for this high-current adjustable regulator. It remains a versatile choice for variable power supplies and industrial applications.
- Adjustable Output: 1.25V to 37V range provides design flexibility for multiple voltage rails.
- High Current Capacity: 1.5A output supports motors, amplifiers, and power-hungry loads.
- Excellent Ripple Rejection: 80dB PSRR at 120Hz minimizes mains hum in audio applications.
- Robust Package: TO-220-3 allows for easy heatsinking and reliable thermal performance.
Adjustable Bench Power Supplies
The 1.25V to 37V adjustable output with 1.5A capability makes it ideal for hobbyist and lab power supplies requiring a flexible voltage source.
Battery Chargers
Use the adjustable output to set precise charge voltages for lead-acid or lithium batteries, with the 1.5A current handling supporting moderate charge rates.
Audio Amplifier Power Rails
The 80dB PSRR at 120Hz effectively filters mains hum, providing clean DC rails for preamplifiers and low-power audio circuits.
Industrial Control Systems
With a TO-220 package and 1.5A output, it can power PLC I/O modules, sensors, and actuators from a common 24V industrial supply.
Variable Speed Motor Controllers
Adjust the output voltage to control small DC motor speed, with the 1.5A current supporting small gear motors and fans.
Prototyping and Development Boards
The adjustable nature allows engineers to quickly prototype different voltage rails without changing components, speeding up development cycles.
- Q: What is the output voltage range?
- A: The output is adjustable from 1.25V up to 37V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly stated; the output can go to 37V, so input must be higher.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified in the provided data; typically around 3V for this device.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 package.
LM317KCSE3.pdf
- Q: What is the output voltage range?
- A: The output is adjustable from 1.25V up to 37V.
- Q: What is the maximum output current?
- A: It can deliver up to 1.5A.
- Q: What is the input voltage range?
- A: The input voltage range is not explicitly stated; the output can go to 37V, so input must be higher.
- Q: What is the dropout voltage?
- A: Dropout voltage is not specified in the provided data; typically around 3V for this device.
- Q: What is the quiescent current?
- A: The quiescent current is 10 mA.
- Q: What package is available?
- A: It comes in a TO-220-3 package.
