LM2991 - 负低压降可调节稳压器

LM2991是TI德州仪器公司的一款单通道LDO产品，LM2991是负低压降可调节稳压器，本站介绍了LM2991的封装应用图解、特点和优点、功能等，并给出了与LM2991相关的TI元器件型号供参考。

LM2991 - 负低压降可调节稳压器 - 单通道LDO - 线性稳压器(LDO) - 德州仪器

产品描述

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).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods. The LM2991 is available in 5-lead TO-220 and DDPAK/TO-263 packages and is rated for operation over the automotive temperature range of −40°C to +125°C. Mil-Aero versions are also available.

产品特性

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

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