Product details

Output options Adjustable Output, Negative Output Iout (Max) (A) 1.5 Vin (Max) (V) -4.2 Vin (Min) (V) -40 Vout (Max) (V) -1.2 Vout (Min) (V) -37 Fixed output options (V) 0 Noise (uVrms) 1110 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 137 Rating Space Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR @ 100 KHz (dB) 30 Dropout voltage (Vdo) (Typ) (mV) 3000 Operating temperature range (C) -55 to 125 Radiation, SEL (MeV.cm2/mg) Bipolar Radiation, TID (Typ) (krad) 30
Output options Adjustable Output, Negative Output Iout (Max) (A) 1.5 Vin (Max) (V) -4.2 Vin (Min) (V) -40 Vout (Max) (V) -1.2 Vout (Min) (V) -37 Fixed output options (V) 0 Noise (uVrms) 1110 Iq (Typ) (mA) 0.065 Thermal resistance θJA (°C/W) 137 Rating Space Load capacitance (Min) (µF) 1 Regulated outputs (#) 1 Accuracy (%) 4 PSRR @ 100 KHz (dB) 30 Dropout voltage (Vdo) (Typ) (mV) 3000 Operating temperature range (C) -55 to 125 Radiation, SEL (MeV.cm2/mg) Bipolar Radiation, TID (Typ) (krad) 30
TO-CAN (NDT) 3 92 mm² 10.03 x 9.14
  • SMD 5962-99517
  • Available TID Qualified to 30 krad(Si)
  • Output Voltage Adjustable from −37 V to −1.2 V
  • 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
  • SMD 5962-99517
  • Available TID Qualified to 30 krad(Si)
  • Output Voltage Adjustable from −37 V to −1.2 V
  • 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

The LM137 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of 1.5 A over an output voltage range of −37 V to −1.2 V. 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 serve 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.

The LM137 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of 1.5 A over an output voltage range of −37 V to −1.2 V. 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 serve 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.

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Type Title Date
* Data sheet LM137QML 3-Terminal Adjustable Negative Regulators datasheet (Rev. F) PDF | HTML 09 Aug 2018
* SMD LM137QML-SP SMD 5962-99517 10 Aug 2020
* Radiation & reliability report LM137QML-SP TID Report 20 Mar 2013
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) PDF | HTML 17 Nov 2022
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19 Oct 2022
Selection guide TI Space Products (Rev. I) 03 Mar 2022
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21 Aug 2020
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form PDF | HTML 18 May 2020
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing 17 Jun 2019
E-book Radiation Handbook for Electronics (Rev. A) 21 May 2019
Application note Use of an LDO as a Load Switch for Space Applications 01 Aug 2018
More literature Die D/S LM137H MD8 3-Terminal Adj Negative Regulator 14 Sep 2012

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