LM2991SX

LM2991负低压差稳压器可调 LM2991 Negative Low Dropout Adjustable Regulator

DESCRIPON

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