LM2990SX-12/NOPB

The LM2990 is a three-terminal, low-dropout, 1-A negative voltage regulator available with fixed output voltages of -5 V, -5.2 V, -12 V, and -15 V. The LM2990 uses circuit design techniques to provide low-dropout and low-quiescent current. The dropout voltage at 1-A load current is typically 0.6 V and an ensured worst-case maximum of 1 V over the entire operating temperature range. The quiescent current is typically 1 mA with 1-A load current and an input-output voltage differential greater than 3 V. 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 (V_OUT - V_IN ≤ 3 V). Output voltage accuracy is ensured to ±5% over load and temperature extremes. The LM2990 also implements short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when overloaded for an extended period of time.

Applications

• Post Switcher Regulator
• Local, On-Card Regulation
• Battery Operated Equipment

Key features

• Input Voltage: -26 V to –6 V
• Fixed Output Voltages: −5 V, −5.2 V, −12 V, and −15 V
• 5% Output Accuracy over Entire Operating Range
• Output Current in Excess of 1 A
• Dropout Voltage Typically 0.6 V at 1-A Load
• Low Quiescent Current
• Internal Short-Circuit Current Limit
• Internal Thermal Shutdown with Hysteresis
• Functional Complement to the LM2940 Series