Overview
The LM337BTG 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 LM337BTG features 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 be used to make programmable output regulators or precision current regulators.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input-Output Voltage Differential (VI-VO) | 40 | Vdc |
| Output Current (IO) | 1.5 | A |
| Output Voltage Range | −1.2 to −37 | V |
| Reference Voltage (VREF) | −1.213 to −1.287 | V |
| Line Regulation (KVI) | 0.01 to 0.04 | %/V |
| Load Regulation (KVL) | 0.3 to 0.7 | %/V |
| Ripple Rejection Ratio (RVF) | 60 to 77 | dB |
| Thermal Resistance, Junction-to-Case (RthJC) | 3 | °C/W |
| Thermal Resistance, Junction-to-Ambient (RthJA) | 70 | °C/W |
| Operating Junction Temperature Range (TJ) | −40 to +125 | °C |
| Storage Temperature Range (TSTG) | −65 to +150 | °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 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 and standard 3-lead transistor packages
- Pb-free and RoHS compliant
- Excellent line and load regulation
- High ripple rejection ratio (up to 77 dB)
- Low temperature coefficient (50 ppm/°C)
Applications
The LM337BTG 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
Q & A
- What is the output voltage range of the LM337BTG?
The output voltage range of the LM337BTG is −1.2 V to −37 V.
- What is the maximum output current of the LM337BTG?
The maximum output current of the LM337BTG is 1.5 A.
- What kind of protection does the LM337BTG have?
The LM337BTG has internal thermal overload protection and short circuit current limiting constant with temperature.
- How is the output voltage set on the LM337BTG?
The output voltage is set using two external resistors connected to the adjustment and output terminals.
- What are the typical line and load regulations of the LM337BTG?
The typical line regulation is 0.01 to 0.04 %/V, and the typical load regulation is 0.3 to 0.7 %/V.
- What is the ripple rejection ratio of the LM337BTG?
The ripple rejection ratio of the LM337BTG is up to 77 dB.
- What are the operating and storage temperature ranges for the LM337BTG?
The operating junction temperature range is −40 to +125 °C, and the storage temperature range is −65 to +150 °C.
- Is the LM337BTG Pb-free and RoHS compliant?
Yes, the LM337BTG is Pb-free and RoHS compliant.
- In what packages is the LM337BTG available?
The LM337BTG is available in surface mount D2PAK and standard 3-lead transistor packages.
- What are some common applications of the LM337BTG?
Common applications include local, on-card regulation, programmable output regulators, precision current regulators, and high voltage applications.
