LM337

Contents

The LM137/LM337 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of -1.5A over an output voltage range of -1.2V to -37V. 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/LM337 serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137/LM337 are ideal complements to the LM117/LM317 adjustable positive regulators.

• Output voltage adjustable from -1.2V to -37V
• 1.5A output current guaranteed, -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
• P⁺ Product Enhancement tested
• Standard 3-lead transistor package
• Output is short circuit protected

LM137 Series Packages and Power Capability