| 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 150 |
| Radiation, SEL (MeV.cm2/mg) | Bipolar |
- 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
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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.
