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LM2991QML
  • LM2991QML
  • LM2991QML
  • LM2991QML

LM2991QML

ACTIVE

Negative Low Dropout Adjustable Regulator

Texas Instruments LM2991QML Product Info

1 April 2026 2

Parameters

Rating

Military

Vin (max) (V)

0.3

Vin (min) (V)

-26

Iout (max) (A)

1

Output options

Adjustable Output

Vout (max) (V)

-3

Vout (min) (V)

-24

Fixed output options (V)

0

Noise (µVrms)

200

PSRR at 100 KHz (dB)

22

Iq (typ) (mA)

0.7

Features

Enable

Thermal resistance θJA (°C/W)

28

Load capacitance (min) (µF)

1

Regulated outputs (#)

1

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

600

Operating temperature range (°C)

-55 to 125

Package

CFP (NAC)-16-62.9285 mm² 9.91 x 6.35

Features

  • 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

  • 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

    • Description

    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.

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