Overview
The LM317MABT is an adjustable three-terminal positive linear 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 exceptionally easy to use and requires only two external resistors to set the output voltage. It features internal current limiting, thermal shutdown, and safe area compensation, making it essentially blow-out proof. The LM317MABT serves a wide variety of applications, including local, on-card regulation, and can also be used as a simple adjustable switching regulator, a programmable output regulator, or as a precision current regulator by connecting a fixed resistor between the adjustment and output pins.
Key Specifications
| Symbol | Parameter | Value | Unit |
|---|---|---|---|
| Vout | Output voltage range | 1.2 – 37 | V |
| Vin – Vout | Voltage differential | 3 – 40 | V |
| TJ | Operating junction temperature range | 0 – 125 | °C |
| IO(MAX) | Maximum output current | 1.5 | A |
| IL(MIN) | Minimum load current | 3.5 mA typical, 12 mA maximum | |
| PD | Power dissipation | Internally Limited | W |
| RθJA | Thermal resistance, Junction to ambient | 80 | °C/W |
| RθJC | Thermal resistance, Junction to case | 5 | °C/W |
Key Features
- Output current in excess of 500 mA
- Output adjustable between 1.2 V and 37 V
- Internal thermal overload protection
- Internal short circuit current limiting
- Output transistor safe-area compensation
- Floating operation for high voltage applications
- Eliminates the need for stocking many fixed voltages
- Pb-Free packages available
- NCV prefix for automotive and other applications requiring site control changes
Applications
- White Goods and Appliances
- Desktop PCs
- Energy Harvesting
- Telematics and Infotainment
- Consumer Products
- Automotive
Q & A
- What is the output voltage range of the LM317MABT?
The output voltage range of the LM317MABT is 1.2 V to 37 V.
- What is the maximum output current of the LM317MABT?
The maximum output current of the LM317MABT is 1.5 A.
- What are the key protection features of the LM317MABT?
The LM317MABT features internal current limiting, thermal shutdown, and safe area compensation.
- How do you set the output voltage of the LM317MABT?
The output voltage of the LM317MABT is set using two external resistors connected between the output and adjustment pins.
- What are some common applications of the LM317MABT?
The LM317MABT is used in various applications including local, on-card regulation, desktop PCs, energy harvesting, telematics, consumer products, and automotive systems.
- What is the minimum load current required for the LM317MABT to maintain regulation?
The minimum load current required is typically 3.5 mA, with a maximum of 12 mA.
- How does the LM317MABT handle thermal issues?
The LM317MABT has internal thermal overload protection and safe area compensation. It also has thermal resistance specifications to ensure proper heat management.
- Can the LM317MABT be used as a precision current regulator?
Yes, the LM317MABT can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output pins.
- Is the LM317MABT Pb-Free and RoHS compliant?
Yes, the LM317MABT is available in Pb-Free packages and is RoHS compliant.
- What is the operating junction temperature range of the LM317MABT?
The operating junction temperature range of the LM317MABT is 0°C to 125°C.
