LM2990 PDF Datasheet
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Description
This is Negative Low Dropout Regulator. LM2990 Negative Low Dropout Regulator
June 1999
LM2990 Negative Low Dropout Regulator
General Description
The LM2990 is a three-terminal, low dropout, 1 ampere negative voltage regulator available with fixed output voltages of 5, 5.2, 12, and 15V. The LM2990 uses new circuit design techniques to provide low dropout and low quiescent current. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with 1A load current and an input-output voltage differential greater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VOUT VIN ≤ 3V). Output voltage accuracy is guaranteed to ± 5% over load, and temperature extremes. The LM2990 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an.