Maker : National Semiconductor
Part No. : LM337H

  Datasheet PDF : LM337H.pdf
  Cross Reference : LM337H Cross Reference
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Product Information

LM137/LM337 3-Terminal Adjustable Negative Regulators May 1999 LM137/LM337 3-Terminal Adjustable Negative Regulators General Description 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. n n n n n n n n 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 Rated Device LM137/337 LM337 LM337 Package TO-3 (K) TO-39 (H) TO-220 (T) SOT-223 (MP) Power Dissipation 20W 2W 15W 2W Design Load Current 1.5A 0.5A 1.5A 1A Features n n n n n 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 Typical Applications Adjustable Negative Voltage Regulator Comparison between SOT-223 and D-Pak (TO-252) Packages DS009067-31 Scale 1:1 DS009067-1 Full output current not available at high input-output voltages †C1 = 1 µF solid tantalum or 10 µF aluminum electrolytic required for stability *C2 = 1 µF solid tantalum is required only if regulator is more than 4" from power-supply filter capacitor Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients © 1999 National Semiconductor Corporation DS009067 www.national.com Absolute Maximum Ratings (Notes 1, 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Dissipation Input-Output Voltage Differential Operating Junction Temperature Range LM137 Internally Limited 40V −55˚C to +150˚C LM337 Storage Temperature Lead Temperature (Soldering, 10 sec.) Plastic Package (Soldering, 4 sec.) ESD Rating 0˚C to +125˚C −65˚C to +150˚C 300˚C 260˚C 2k Volts Electrical Characteristics (Note 1) Parameter Line Regulation Load Regulation Thermal Regulation Adjustment Pin Current Adjustment Pin Current Charge 10 mA ≤ IL ≤ IMAX 3.0V ≤ |VIN − VOUT| ≤ 40V, TA = 25˚C Reference Voltage Tj = 25˚C (Note 3) 3V ≤ |VIN − VOUT| ≤ 40V, (Note 3) 10 mA ≤ IOUT ≤ IMAX, P ≤ PMAX Line Regulation Load Regulation Temperature Stability Minimum Load Current Current Limit 3V ≤ |VIN − VOUT| ≤ 40V, (Note 2) 10 mA ≤ IOUT ≤ IMAX, (Note 2) TMIN ≤ Tj ≤ TMAX |VIN − VOUT| ≤ 40V |VIN − VOUT| ≤ 10V |VIN − VOUT| ≤ 15V K, MP and T Package H Package |VIN − VOUT| = 40V, Tj = 25˚C K, MP and T Package RMS Output Noise, % of VOUT Ripple Rejection Ratio Long-Term Stability Thermal Resistance, Junction to Case Thermal Resistance, Junction to Ambient (No Heat Sink) H Package Tj = 25˚C, 10 Hz ≤ f ≤ 10 kHz VOUT = −10V, f = 120 Hz CADJ = 10 µF Tj = 125˚C, 1000 Hours H Package K Package T Package H Package K Package T Package MP Package 140 35 0.24 0.15 0.4 0.17 0.003 60 66 77 0.3 12 2.3 1 15 3 66 0.15 0.10 0.4 0.17 0.003 60 77 0.3 12 2.3 4 140 35 50 170 1 15 3 A A % dB dB % ˚...

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