Overview
The LM317MBSTT3G, produced by onsemi, is an adjustable three-terminal positive linear voltage regulator. 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, requiring 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 LM317MBSTT3G is suitable for a wide variety of applications, including local, on-card regulation, and can be used as an adjustable switching regulator, a programmable output regulator, or as a precision current regulator.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Current | - | - | 500 | mA |
| Output Voltage Range | 1.2 | - | 37 | V |
| Reference Voltage (Vref) | 1.225 | 1.250 | 1.275 | V |
| Line Regulation (3.0 V ≤ VI - VO ≤ 40 V) | 0.01 | 0.04 | 0.07 | %/V |
| Load Regulation (10 mA ≤ IO ≤ 0.5 A) | 0.1 | - | 25 | mV |
| Adjustment Pin Current | 50 | 100 | - | μA |
| Thermal Shutdown | - | - | 180 | °C |
| Maximum Junction Temperature | - | - | 150 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- Output current in excess of 500 mA
- Output voltage adjustable between 1.2 V and 37 V
- Internal thermal overload protection and 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
- Local, on-card regulation
- Adjustable switching regulators
- Programmable output regulators
- Precision current regulators
- White goods and appliances
- Desktop PCs
- Energy harvesting
- Telematics and infotainment
- Consumer products
- Automotive applications
Q & A
- What is the output current range of the LM317MBSTT3G?
The LM317MBSTT3G can supply an output current in excess of 500 mA.
- What is the adjustable output voltage range of the LM317MBSTT3G?
The output voltage is adjustable between 1.2 V and 37 V.
- What are the key protection features of the LM317MBSTT3G?
The LM317MBSTT3G features internal thermal overload protection, short circuit current limiting, and safe area compensation.
- How do you set the output voltage of the LM317MBSTT3G?
The output voltage is set using two external resistors connected to the adjustment and output terminals.
- What is the purpose of the adjustment pin current?
The adjustment pin current is kept constant and low (typically 100 μA) to minimize its impact on the output voltage regulation.
- What is the thermal shutdown temperature of the LM317MBSTT3G?
The thermal shutdown temperature is approximately 180°C.
- What are some common applications of the LM317MBSTT3G?
Common applications include local on-card regulation, adjustable switching regulators, programmable output regulators, precision current regulators, and various consumer and automotive applications.
- What is the significance of the NCV prefix in some versions of the LM317M?
The NCV prefix indicates versions suitable for automotive and other applications requiring site control changes.
- What type of packages are available for the LM317MBSTT3G?
The LM317MBSTT3G is available in Pb-free packages such as DPAK and SOT-223.
- How does the LM317MBSTT3G handle high voltage applications?
The LM317MBSTT3G supports floating operation, allowing it to handle high voltage applications with respect to ground).
