DESCRIPTION
●The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −3V to −24V. The LM2991 provides up to 1A of load current and features a 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 1 mA 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 9 mA (typical) when the regulator is in the dropout mode (VOUT − VIN ≤ 3V).
●1FEATURES
●2• Output Voltage Adjustable from −3V to −24V, Typically −2V to −25V
●• Output Current in Excess of 1A
●• Dropout Voltage Typically 0.6V at 1A Load
●• Low Quiescent Current
●• Internal Short Circuit Current Limit
●• Internal Thermal Shutdown with Hysteresis
●• TTL, CMOS Compatible ON/OFF Switch
●• Functional Complement to the LM2941 Series
●APPLICATIONS
●• Post Switcher Regulator
●• Local, On-Card, Regulation
●• Battery Operated Equipment
