LM2991QML是TI公司的一款单通道LDO产品，LM2991QML是Negative Low Dropout Adjustable Regulator，本页介绍了LM2991QML的产品说明、应用、特性等，并给出了与LM2991QML相关的TI元器件型号供参考。
LM2991QML - Negative Low Dropout Adjustable Regulator - 单通道LDO - 线性稳压器(LDO) - TI公司（Texas Instruments，德州仪器）
The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −2V to −25V. 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 a guaranteed 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 (VO − VI
The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods.
