LM337 Voltage Regulator
The LM337 Voltage Regulator is a negative voltage counterpart to the popular LM317. It offers an adjustable output range from -1.25V to -37V, ideal for use in dual/split power supplies, analog audio circuits, and negative voltage rails in embedded systems.
Encased in a TO-220 package, the LM337 is equipped with essential safety features including thermal shutdown, current limiting, and safe operating area (SOA) protection, ensuring reliable and stable operation even under demanding conditions. When paired with the LM317, it allows full Β± voltage rail design for more complex circuit requirements.
π Technical Details
| Specification | Details |
|---|---|
| Output Voltage Range | -1.25V to -37V (Adjustable) |
| Max Output Current | 1.5A |
| Input Voltage | Up to -40V |
| Dropout Voltage | ~2V |
| Package Type | TO-220 |
| Thermal Protection | Yes |
| Short-Circuit Protection | Yes |
| Mounting Type | Through-hole |
| Operating Temp Range | 0Β°C to 125Β°C |
| Heatsink Compatible | Yes |
π‘ Use Cases & Applications
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β‘ Split Power Supplies
Ideal for creating dual-voltage rails in op-amp and analog signal circuits. -
ποΈ Analog Audio Systems
Used in high-fidelity audio preamps and processing circuits for clean negative voltage rails. -
π Custom Bench Power Supplies
Enables variable negative voltage rails for testing and prototyping environments. -
π Sensor Interfaces
Supplies negative bias voltages for specialized analog sensors and instruments. -
π¬ Lab Instrumentation
Power precision measurement devices needing both positive and negative voltage references.
π οΈ Pair With
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𧩠Electronics Components β Include resistors and capacitors for setting voltage.
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β‘ Power Supplies β Use unregulated DC sources as input.
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π§ Tools and Accessories β Multimeters, soldering stations for testing and installation.
π₯ YouTube Tutorial
πΊ Learn how to design a dual power supply with LM317 and LM337
π Watch Tutorial
β οΈ Precautions & Tips
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π§― Use a heatsink when drawing over 500mA to avoid thermal shutdown.
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β οΈ Add capacitors at input (0.1ΞΌF) and output (1ΞΌF) for voltage stability.
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π Always observe polarity β LM337 is for negative voltage regulation.
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𧲠Diodes may be required for protection against reverse currents in capacitive loads.
π Summary & Call-to-Action
The LM337 Voltage Regulator is a robust and flexible solution for negative voltage regulation, suitable for analog designs and precision systems. Its adjustable output and built-in protections ensure consistent performance in both DIY and professional applications.
π Order yours now from Electroway β engineer smarter circuits with reliable negative power.
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