Texas Instruments LM317MQDCYR
| Quantity | Unit Price | Total Price |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 15+ | $0.53 | $7.95 |
| 25+ | $0.52 | $13.00 |
| 50+ | $0.49 | $24.50 |
| 100+ | $0.44 | $44.00 |
| N+ | $0.09 | Price Inquiry |
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| Product attributes | Property Value |
| Manufacturer | Texas Instruments |
| Product Series | |
| Packaging | Cut Tape (CT) | Tape & Reel (TR) |
| 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 | 500mA |
| Current - Quiescent (Iq) | 10 mA |
| Current - Supply (Max) | - |
| PSRR | 80dB ~ 65dB (120Hz) |
| Control Features | - |
| Protection Features | Over Current, Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | TO-261-4, TO-261AA |
| Supplier Device Package | SOT-223-4 |
| ROHS |  |
The LM317MQDCYR from Texas Instruments is a versatile adjustable linear voltage regulator designed for applications requiring a stable, precise output voltage. With an output range from 1.25V to 37V and a maximum current of 500mA, it offers excellent flexibility for a wide variety of low-power designs. Its high power supply rejection ratio ensures clean power delivery, while the compact SOT-223-4 package simplifies board integration.
- Wide Adjustable Output Range (1.25V to 37V): Provides design flexibility for multiple voltage rails without needing different regulator models.
- High PSRR (80dB to 65dB at 120Hz): Effectively filters input ripple, ensuring clean and stable output for sensitive analog and digital circuits.
- Compact SOT-223-4 Package: Saves valuable PCB space while still offering adequate thermal performance for 500mA loads.
- Low Quiescent Current (10mA): Reduces power consumption in battery-operated or energy-efficient systems.
Adjustable Power Supply for Microcontrollers
The LM317MQDCYR's adjustable output from 1.25V to 37V makes it ideal for powering microcontrollers that require a specific, non-standard voltage rail. Its 500mA current capability is sufficient for most MCU boards and peripheral circuits.
Battery Charger Circuitry
With its adjustable output and 500mA current limit, this LDO can be configured as a constant-voltage source for charging single-cell lithium-ion or NiMH batteries. The low quiescent current helps minimize battery drain during standby.
Precision Analog Front-End Supply
The high PSRR of 80dB to 65dB at 120Hz ensures clean, ripple-free DC power for sensitive analog circuits like op-amps, ADCs, and sensor signal conditioning, improving measurement accuracy.
Industrial Sensor Interface
In industrial environments with noisy 24V rails, the LM317MQDCYR can step down to a stable 5V or 3.3V for sensor interfaces. The SOT-223 package allows for compact PCB layouts in space-limited field transmitters.
Bench Power Supply Module
Hobbyists and engineers can use this adjustable regulator to build a compact bench power supply module. The wide output range and 500mA capability cover many low-power prototyping needs.
Automotive Aftermarket Electronics
For car accessories requiring a stable voltage from the 12V battery system, this LDO provides a regulated output that is immune to alternator ripple, thanks to its excellent PSRR characteristics.
- Q: What is the output voltage range of the LM317MQDCYR?
- A: The output voltage is adjustable from 1.25V up to 37V, making it highly versatile for various applications.
- Q: What is the maximum output current?
- A: The LM317MQDCYR can deliver up to 500mA of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 1.25V up to a maximum of 37V, allowing flexible supply configurations.
- Q: What is the dropout voltage?
- A: The dropout voltage is not explicitly specified in the provided data, but typical LM317 devices have a dropout of around 2V at full load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA, which is relatively low for an adjustable regulator.
- Q: What package is available?
- A: This device is offered in a compact SOT-223-4 package, suitable for space-constrained designs.
LM317MQDCYR.pdf
- Q: What is the output voltage range of the LM317MQDCYR?
- A: The output voltage is adjustable from 1.25V up to 37V, making it highly versatile for various applications.
- Q: What is the maximum output current?
- A: The LM317MQDCYR can deliver up to 500mA of continuous output current.
- Q: What is the input voltage range?
- A: The input voltage range is from 1.25V up to a maximum of 37V, allowing flexible supply configurations.
- Q: What is the dropout voltage?
- A: The dropout voltage is not explicitly specified in the provided data, but typical LM317 devices have a dropout of around 2V at full load.
- Q: What is the quiescent current?
- A: The quiescent current is typically 10 mA, which is relatively low for an adjustable regulator.
- Q: What package is available?
- A: This device is offered in a compact SOT-223-4 package, suitable for space-constrained designs.
