Overview
The LM317BD2TG is an adjustable 3-terminal positive voltage regulator produced by onsemi. It is capable of supplying in excess of 1.5 A 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 LM317BD2TG is suitable for a wide variety of applications, including local, on-card regulation, and can also be used as a precision current regulator or in high voltage applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 1.5 | A |
| Output Voltage Range | 1.2 to 37 | V |
| Input-Output Voltage Differential | -0.3 to 40 | Vdc |
| Power Dissipation (Case 221A, TA = +25°C) | Internally Limited | W |
| Thermal Resistance, Junction-to-Ambient (Case 936, D2PAK-3) | 70 | °C/W |
| Operating Junction Temperature Range | -55 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Line Regulation (TA = +25°C, 3.0 V ≤ VI-VO ≤ 40 V) | 0.01 to 0.04 | %/V |
| Load Regulation (TA = +25°C, 10 mA ≤ IO ≤ Imax, VO ≤ 5.0 V) | 0.1 to 5.0 | mV |
| Reference Voltage (3.0 V ≤ VI-VO ≤ 40 V, 10 mA ≤ IO ≤ Imax) | 1.2 to 1.3 | V |
| Adjustment Pin Current | 50 to 100 | μA |
| Ripple Rejection (VO = 10 V, f = 120 Hz, CAdj = 10 μF) | 65 to 80 | dB |
Key Features
- Output current in excess of 1.5 A
- Output 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
- Eliminates the need for stocking many fixed voltages
- Available in surface mount D2PAK-3 and standard 3-lead transistor package
- Pb-free, halogen-free/BFR-free, and RoHS compliant
Applications
The LM317BD2TG is versatile and can be used in a variety of applications, including local, on-card regulation. It is suitable for making programmable output regulators and can be used as a precision current regulator by connecting a fixed resistor between the adjustment and output terminals. Additionally, it is used in high voltage applications and can operate in floating configurations. The NCV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other applications requiring unique site and control change requirements.
Q & A
- What is the output current range of the LM317BD2TG?
The LM317BD2TG can supply an output current in excess of 1.5 A. - What is the adjustable output voltage range of the LM317BD2TG?
The output voltage is adjustable between 1.2 V and 37 V. - What kind of protection does the LM317BD2TG have?
The LM317BD2TG features internal thermal overload protection, internal short circuit current limiting, and safe area compensation. - How do you set the output voltage of the LM317BD2TG?
The output voltage can be set using only two external resistors. - Is the LM317BD2TG suitable for high voltage applications?
Yes, it supports floating operation for high voltage applications. - What are the package options for the LM317BD2TG?
It is available in surface mount D2PAK-3 and standard 3-lead transistor packages. - Is the LM317BD2TG RoHS compliant?
Yes, it is Pb-free, halogen-free/BFR-free, and RoHS compliant. - Can the LM317BD2TG be used as a precision current regulator?
Yes, by connecting a fixed resistor between the adjustment and output terminals. - What is the ripple rejection of the LM317BD2TG?
The ripple rejection is 65 to 80 dB at 120 Hz with CAdj = 10 μF. - What is the operating junction temperature range of the LM317BD2TG?
The operating junction temperature range is -55 to +150°C.
