Overview
The LM337BD2TR4G is an adjustable 3-terminal negative voltage regulator produced by Onsemi. This device is capable of supplying in excess of 1.5 A 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 LM337BD2TR4G features internal current limiting, thermal shutdown, and safe area compensation, making it essentially blow-out proof. This regulator is available in a D2PAK package and is Pb-free and RoHS compliant.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Range | −1.2 V to −37 V | V |
| Output Current | Up to 1.5 A | A |
| Input-Output Voltage Differential | 40 V | Vdc |
| Power Dissipation | 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 | −40 to +125 °C | °C |
| Storage Temperature Range | −65 to +150 °C | °C |
| Line Regulation | 0.01% to 0.04%/V | %/V |
| Load Regulation | 0.3% to 1.0% | % |
| Ripple Rejection | 66 to 77 dB | dB |
| Adjustment Pin Current | 65 to 100 μA | μA |
| Reference Voltage | −1.213 to −1.287 V | V |
Key Features
- Adjustable output voltage between −1.2 V and −37 V
- Output current in excess of 1.5 A
- Internal thermal overload protection and short circuit current limiting
- Safe area compensation for output transistor
- Floating operation for high voltage applications
- Excellent line and load regulation (0.01%/V and 0.3% respectively)
- Ripple rejection up to 77 dB
- Available in D2PAK and TO-220AB packages
- Pb-free and RoHS compliant
Applications
The LM337BD2TR4G is suitable for a wide variety of applications, including local, on-card regulation. It can be used to make programmable output regulators or as a precision current regulator by connecting a fixed resistor between the adjustment and output terminals. The device is particularly useful in high voltage applications due to its floating operation capability.
Q & A
- What is the output voltage range of the LM337BD2TR4G?
The output voltage range is −1.2 V to −37 V. - What is the maximum output current of the LM337BD2TR4G?
The maximum output current is up to 1.5 A. - What type of protection does the LM337BD2TR4G have?
The device has internal thermal overload protection, short circuit current limiting, and safe area compensation. - What is the thermal resistance of the LM337BD2TR4G in a D2PAK package?
The thermal resistance, junction-to-ambient, is 70 °C/W, and junction-to-case is 5.0 °C/W. - Is the LM337BD2TR4G Pb-free and RoHS compliant?
Yes, the device is Pb-free and RoHS compliant. - What is the ripple rejection of the LM337BD2TR4G?
The ripple rejection is up to 77 dB. - How do you set the output voltage of the LM337BD2TR4G?
The output voltage is set using two external resistors connected to the adjustment and output terminals. - What are the common applications of the LM337BD2TR4G?
Common applications include local, on-card regulation, programmable output regulators, and precision current regulators. - What is the operating junction temperature range of the LM337BD2TR4G?
The operating junction temperature range is −40 to +125 °C. - What is the storage temperature range of the LM337BD2TR4G?
The storage temperature range is −65 to +150 °C.
