Overview
The LM317MQDCYRG3 is an adjustable three-terminal positive-voltage regulator produced by Texas Instruments. This device is capable of supplying up to 1.5 A of output current over an adjustable output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage, making it highly versatile and easy to use. The LM317MQDCYRG3 features high line and load regulation, with typical values of 0.01% and 0.1%, respectively. It also includes internal short-circuit current limiting, thermal overload protection, and safe operating area protection, ensuring robust operation under various conditions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Range | 1.25 V to 37 V | V |
| Output Current | Greater than 1.5 A | A |
| Input Voltage Range | 4.25 V to 40 V | V |
| Line Regulation Accuracy | 0.01% | % |
| Load Regulation Accuracy | 0.1% | % |
| PSRR (120 Hz) | 64 dB | dB |
| Operating Temperature Range | 0°C to 125°C | °C |
| Package Type | SOT-223 (DCY) | |
| Body Size | 6.5 mm x 3.5 mm | mm |
| Junction-to-Ambient Thermal Resistance | 60.2 °C/W | °C/W |
Key Features
- Output voltage range adjustable from 1.25 V to 37 V
- Output current greater than 1.5 A
- Internal short-circuit current limiting
- Thermal overload protection
- Safe operating area protection
- High line and load regulation accuracy
- Optional output capacitor for improved transient response
- ADJUST terminal can be bypassed for high ripple-rejection ratios
- Can function as a precision current regulator with a single resistor
Applications
- ATCA solutions
- DLP: 3D biometrics, hyperspectral imaging, optical networking, and spectroscopy
- DVR and DVS
- Desktop PCs
- Digital signage and still cameras
- ECG electrocardiograms
- EV HEV chargers: levels 1, 2, and 3
- Electronic shelf labels
- Energy harvesting
- Ethernet switches
- Femto base stations
- Fingerprint and iris biometrics
- HVAC: heating, ventilating, and air conditioning
- High-speed data acquisition and generation
- Hydraulic valves
- IP phones: wired and wireless
- Intelligent occupancy sensing
- Motor controls: brushed DC, brushless DC, low-voltage, permanent magnet, and stepper motors
- Point-to-point microwave backhauls
- Power bank solutions
- Power line communication modems
- Power over ethernet (PoE)
- Power quality meters
- Power substation controls
- Private branch exchanges (PBX)
- Programmable logic controllers
- RFID readers
- Refrigerators
- Signal or waveform generators
- Software-defined radios (SDR)
- Washing machines: high-end and low-end
- X-rays: baggage scanners, medical, and dental
Q & A
- What is the output voltage range of the LM317MQDCYRG3?
The output voltage range is adjustable from 1.25 V to 37 V.
- What is the maximum output current of the LM317MQDCYRG3?
The maximum output current is greater than 1.5 A.
- What types of protection does the LM317MQDCYRG3 include?
The device includes internal short-circuit current limiting, thermal overload protection, and safe operating area protection.
- How do you set the output voltage of the LM317MQDCYRG3?
The output voltage is set using two external resistors connected to the ADJUST terminal.
- What is the recommended operating temperature range for the LM317MQDCYRG3?
The recommended operating temperature range is from 0°C to 125°C.
- Can the LM317MQDCYRG3 be used as a current regulator?
- What is the purpose of the ADJUST terminal bypass capacitor?
The ADJUST terminal bypass capacitor can be used to achieve high ripple-rejection ratios.
- What are some common applications of the LM317MQDCYRG3?
Common applications include ATCA solutions, DVR and DVS, desktop PCs, digital signage, and various industrial and medical devices.
- What is the package type and body size of the LM317MQDCYRG3?
The package type is SOT-223 (DCY), and the body size is 6.5 mm x 3.5 mm.
- What is the junction-to-ambient thermal resistance of the LM317MQDCYRG3?
The junction-to-ambient thermal resistance is 60.2 °C/W.
