Overview
The LM317MDTG is an adjustable three-terminal positive voltage regulator produced by onsemi. It is capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. This regulator is known for its ease of use, requiring only two external resistors to set the output voltage. It also features internal current limiting, thermal shutdown, and safe area compensation, making it highly reliable and essentially blow-out proof.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage Range | 1.2 | - | 37 | V |
| Output Current | - | - | 500 | mA |
| Line Regulation (TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V) | 0.01 | 0.04 | - | %/V |
| Load Regulation (TA = 25°C, 10 mA ≤ IO ≤ 0.5 A) | - | - | 0.04 | % |
| RMS Noise (TA = 25°C, 10 Hz ≤ f ≤ 10 kHz) | - | - | 0.003 | % of VO |
| Ripple Rejection (VO = 10 V, f = 120 Hz) | 66 | - | 80 | dB |
| Thermal Shutdown | - | - | 180 | °C |
| Long-Term Stability (TJ = Thigh) | 0.3 | - | 1.0 | %/1.0 kHrs |
Key Features
- Adjustable output voltage between 1.2 V and 37 V.
- Output current in excess of 500 mA.
- Internal current limiting and thermal shutdown for enhanced reliability.
- Safe area compensation to prevent device failure.
- Simple to use, requiring only two external resistors to set the output voltage.
- Can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output pins.
Applications
The LM317MDTG is versatile and serves a wide variety of applications, including local, on-card regulation. It can be used as an adjustable switching regulator, a programmable output regulator, or as a precision current regulator. This regulator is suitable for various electronic systems that require stable and adjustable voltage regulation.
Q & A
- What is the output voltage range of the LM317MDTG?
The output voltage range of the LM317MDTG is 1.2 V to 37 V. - What is the maximum output current of the LM317MDTG?
The maximum output current of the LM317MDTG is in excess of 500 mA. - How do you set the output voltage of the LM317MDTG?
The output voltage of the LM317MDTG is set using two external resistors. - What safety features does the LM317MDTG have?
The LM317MDTG features internal current limiting, thermal shutdown, and safe area compensation. - Can the LM317MDTG be used as a current regulator?
Yes, the LM317MDTG can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output pins. - What is the thermal shutdown temperature of the LM317MDTG?
The thermal shutdown temperature of the LM317MDTG is approximately 180°C. - How does the LM317MDTG perform in terms of ripple rejection?
The LM317MDTG has a ripple rejection of 66 dB to 80 dB at 120 Hz. - What is the long-term stability of the LM317MDTG?
The long-term stability of the LM317MDTG is estimated to be 0.3% to 1.0% per 1,000 hours. - What are some common applications of the LM317MDTG?
The LM317MDTG is commonly used in local, on-card regulation, adjustable switching regulators, programmable output regulators, and precision current regulators. - Is the LM317MDTG easy to use?
Yes, the LM317MDTG is exceptionally easy to use and requires minimal external components to set the output voltage.
