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Negative Low Dropout Adjustable Regulator


Package | PIN: NAC | 16
Temp: M (-55 to 125)
Qty Price
1-9 $91.42
10-24 $86.37
25-99 $83.85
100-249 $81.33
250-499 $78.81
500-749 $76.92
750-999 $71.87
1000+ $71.64


  • Output voltage adjustable from −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

  • Texas Instruments  LM2991GW-QML

    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  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.