The LM137 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −37V to −1.2V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads.

The LM137 serves a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137 are ideal complements to the LM117 adjustable positive regulators.

• Output Voltage Adjustable from −37V to −1.2V
• 1.5A Output Current Specified, −55°C to +150°C
• Line Regulation Typically 0.01%/V
• Load Regulation Typically 0.3%
• Excellent Thermal Regulation, 0.002%/W
• 77 dB Ripple Rejection
• Excellent Rejection of Thermal Transients
• 50 ppm/°C Temperature Coefficient
• Temperature-independent Current Limit
• Internal Thermal Overload Protection
• Standard 3-lead Transistor Package
• Output is Short Circuit Protected