Overview
The LM317MDTRKG is an adjustable three-terminal positive voltage regulator produced by onsemi. This device is capable of supplying in excess of 500 mA over an output voltage range of 1.2 V to 37 V. It is exceptionally easy to use, requiring only two external resistors to set the output voltage. The LM317M series, including the LM317MDTRKG, is known for its internal current limiting, thermal shutdown, and safe area compensation, making it essentially blow-out proof.
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | Up to 500 mA |
| Output Voltage Range | 1.2 V to 37 V |
| Minimum Load Current to Maintain Regulation | 5 mA (VI - VO = 40 V) |
| Maximum Output Current | 500 mA (VI - VO ≤ 15 V, PD ≤ Pmax) |
| RMS Noise | 0.003% of VO (TA = 25°C, 10 Hz ≤ f ≤ 10 kHz) |
| Ripple Rejection | 66 dB (VO = 10 V, f = 120 Hz, without CAdj), 80 dB (with CAdj = 10 μF) |
| Thermal Shutdown | 180°C |
| Long-Term Stability | 0.3% to 1.0%/1.0 kHrs (TJ = Thigh) |
| Operating Temperature Range | 0°C to +125°C (LM317MA), -40°C to +125°C (LM317MB) |
Key Features
- Adjustable output voltage between 1.2 V and 37 V.
- Internal current limiting and thermal shutdown for protection.
- Safe area compensation to prevent device failure.
- Low dropout voltage.
- Can be used as a precision current regulator or adjustable switching regulator.
- Requires only two external resistors for voltage setting.
Applications
The LM317MDTRKG is versatile and serves a wide variety of applications, including local, on-card regulation. It can be used in various configurations such as a programmable output regulator, a precision current regulator, or an adjustable switching regulator. It is suitable for use in power supplies, battery chargers, and other electronic systems requiring adjustable voltage regulation.
Q & A
- What is the output current range of the LM317MDTRKG?
The LM317MDTRKG can supply up to 500 mA of output current. - What is the adjustable output voltage range of the LM317MDTRKG?
The output voltage can be adjusted between 1.2 V and 37 V. - What are the key protection features of the LM317MDTRKG?
The device features internal current limiting, thermal shutdown, and safe area compensation. - How is the output voltage set on the LM317MDTRKG?
The output voltage is set using two external resistors. - What are some common applications of the LM317MDTRKG?
It is used in local, on-card regulation, power supplies, battery chargers, and as a precision current regulator or adjustable switching regulator. - What is the thermal shutdown temperature of the LM317MDTRKG?
The thermal shutdown temperature is 180°C. - What is the long-term stability of the LM317MDTRKG?
The long-term stability is 0.3% to 1.0%/1.0 kHrs at high junction temperature. - What is the operating temperature range of the LM317MDTRKG?
The operating temperature range is 0°C to +125°C for LM317MA and -40°C to +125°C for LM317MB. - How does the LM317MDTRKG handle ripple rejection?
The device has a ripple rejection of 66 dB without CAdj and 80 dB with CAdj = 10 μF. - Can the LM317MDTRKG be used as a precision current regulator?
Yes, it can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output terminals.
