The LM2991T is a low-dropout adjustable Negative Regulator with output voltage range between -3 to -24V. The LM2991 provides up to 1A of load current and features ON//OFF pin for remote shutdown capability. The LM2991 uses new circuit design techniques to provide a low-dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1A load current is typically 0.6V and an ensured worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1mA with a 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 9mA when the regulator is in the dropout mode. The LM2991 is short-circuit proof and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods.
