LM2991QML Negative Low Dropout Adjustable Regulator | 德州仪器 TI.com.cn

LM2991QML (正在供货)

Negative Low Dropout Adjustable Regulator

Negative Low Dropout Adjustable Regulator - LM2991QML


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.


  • 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

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    参数 与其它产品相比 线性稳压器 (LDOs)

    Output Options
    Iout (Max) (A)
    Vin (Max) (V)
    Vin (Min) (V)
    Vout (Max) (V)
    Vout (Min) (V)
    Package Group
    Operating Temperature Range (C)
    Accuracy (%)
    Vdo (Typ) (mV)
    Iq (Typ) (mA)
    Package Size: mm2:W x L (PKG)
    Adjustable Output
    Negative Output    
    CFP | 16    
    -40 to 85
    -55 to 125    
    See datasheet (CFP)