Overview
The LM317BD2TR4G is an adjustable 3-terminal positive voltage regulator produced by onsemi. This device is capable of supplying more than 1.5 A of current 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 LM317BD2TR4G is designed with internal current limiting, thermal shutdown, and safe area compensation, making it essentially blow-out proof. This regulator is suitable for a wide variety of applications, including local, on-card regulation, and can also be used as a precision current regulator or a programmable output regulator.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 1.5 A | A |
| Output Voltage Range | 1.2 V to 37 V | V |
| Input-Output Voltage Differential | -0.3 to 40 Vdc | Vdc |
| Power Dissipation (Case) | Internally Limited | W |
| Thermal Resistance, Junction-to-Ambient | 65 °C/W (D2PAK-3) | °C/W |
| Thermal Resistance, Junction-to-Case | 5.0 °C/W | °C/W |
| Operating Junction Temperature Range | -55 to +150 °C | °C |
| Storage Temperature Range | -65 to +150 °C | °C |
| Line Regulation | 0.01 to 0.04 %/V | %/V |
| Load Regulation | 0.1 to 25 mV % | mV % |
| Adjustment Pin Current | 50 to 100 μA | μA |
| Reference Voltage | 1.2 to 1.3 V | V |
| Ripple Rejection | 66 to 80 dB | dB |
| Thermal Shutdown | 180 °C | °C |
Key Features
- Output current in excess of 1.5 A
- Output voltage adjustable between 1.2 V and 37 V
- Internal thermal overload protection
- Internal short-circuit current limiting constant with temperature
- Output transistor safe-area compensation
- Floating operation for high voltage applications
- No need to stock many fixed voltages
- Available in surface mount D2PAK-3 and standard 3-lead transistor package
- NCV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The LM317BD2TR4G is versatile and can be used in a variety of applications, including:
- Local, on-card regulation
- Programmable output regulators
- Precision current regulators
- High voltage applications where floating operation is necessary
- Automotive and industrial applications requiring high reliability and compliance with automotive standards (AEC-Q100 qualified)
Q & A
- What is the output current range of the LM317BD2TR4G?
The LM317BD2TR4G can supply more than 1.5 A of current.
- What is the adjustable output voltage range of the LM317BD2TR4G?
The output voltage can be adjusted between 1.2 V and 37 V.
- Does the LM317BD2TR4G have internal thermal protection?
- How do I set the output voltage of the LM317BD2TR4G?
The output voltage can be set using two external resistors (R1 and R2) connected to the adjustment and output terminals.
- Can the LM317BD2TR4G be used as a precision current regulator?
- What are the thermal resistance values for the LM317BD2TR4G?
The thermal resistance from junction to ambient is 65 °C/W, and from junction to case is 5.0 °C/W.
- Is the LM317BD2TR4G RoHS compliant?
- What are the operating and storage temperature ranges for the LM317BD2TR4G?
The operating junction temperature range is -55 to +150 °C, and the storage temperature range is -65 to +150 °C.
- Can the LM317BD2TR4G be used in high voltage applications?
- Is the LM317BD2TR4G suitable for automotive applications?
