Overview
The LM317BD2T is an adjustable 3-terminal positive voltage regulator produced by ON Semiconductor. It is capable of supplying an output current in excess of 1.5 A 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 features internal current limiting, thermal shutdown, and safe area compensation, making it highly reliable and essentially blow-out proof.
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 | 70 °C/W | °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 | 0.04 %/V | %/V |
| Load Regulation | 0.5 %/V | %/V |
| Ripple Rejection (Typ) | 65 dB | dB |
| Package | D2PAK-3 | |
| Minimum Operating Temperature | -40 °C | °C |
| Maximum Operating Temperature | +125 °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 and short circuit current limiting
- Safe area compensation for the output transistor
- Floating operation for high voltage applications
- Eliminates the need for stocking many fixed voltages
- Available in surface mount D2PAK-3 and standard 3-lead transistor packages
- Pb-free, halogen-free/BFR-free, and RoHS compliant
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements
Applications
The LM317BD2T is versatile and serves a wide variety of applications, including local, on-card regulation. It can be used to make a programmable output regulator or as a precision current regulator by connecting a fixed resistor between the adjustment and output terminals. It is suitable for high voltage applications and can be used in electronic shutdown regulators, adjustable current limiters, and other voltage regulation needs.
Q & A
- What is the output current range of the LM317BD2T?
The LM317BD2T can supply an output current in excess of 1.5 A. - What is the adjustable output voltage range of the LM317BD2T?
The output voltage is adjustable between 1.2 V and 37 V. - Does the LM317BD2T have internal protection features?
Yes, it features internal thermal overload protection and short circuit current limiting. - What are the package options for the LM317BD2T?
The LM317BD2T is available in surface mount D2PAK-3 and standard 3-lead transistor packages. - Is the LM317BD2T RoHS compliant?
Yes, it is Pb-free, halogen-free/BFR-free, and RoHS compliant. - What are the operating temperature ranges for the LM317BD2T?
The operating junction temperature range is -55 to +150 °C, and the storage temperature range is -65 to +150 °C. - How is the output voltage set for the LM317BD2T?
The output voltage is set using two external resistors. - Can the LM317BD2T be used for high voltage applications?
Yes, it supports floating operation for high voltage applications. - Is the LM317BD2T suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements. - What is the ripple rejection of the LM317BD2T?
The ripple rejection is typically 65 dB.
