The Texas Instruments LM2940QML-SP is a radiation-hardness-assured (RHA) positive voltage regulator that has the ability to source 1A of output current, with a dropout voltage typically of 0.5V and a maximum of 1V, across the operating temperature range.

To reduce ground current when the differential between the input and output voltage exceeds 3V (approx.), the component includes a quiescent current reduction circuit.

The quiescent current, with an input-output differential of 5V and 1A of output current, is therefore only 30 mA.

Higher quiescent currents will only be present when the regulator is in dropout mode (with VIN − VOUT ≤ 3V).

During instances of line transient, such as a load dump where the input voltage momentarily exceeds the specified maximum operating voltage, the regulator will automatically shutdown to protect both the load and the internal circuits.

The device is also designed for vehicle applications and therefore the regulated circuitry are protected from impacts such as two-battery jumps or reverse battery installations.

In addition, the LM2940QML-SP cannot be harmed by temporary mirror-image insertion. Typical regulator protection features are also included, such as thermal overload and short circuit protection.


  • Military - QML certified for Military and Defense Applications
  • Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application

Orderable Part Numbers

Key features

  • Available with Radiation Ensure
    • ELDRS Free 100 krad(Si)
  • Dropout Voltage Typically 0.5V @IO =1A
  • Output Current in Excess of 1A
  • Output Voltage Trimmed Before Assembly
  • Reverse Battery Protection
  • Internal Short Circuit Current Limit
  • Mirror Image Insertion Protection

Testing & qualification

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Last updated: 2021-12-21


Radiation-hardness-assured (RHA), 6-V to 26-V, 1-A, 5-V output linear regulator



input voltage
6 to 26 V
output voltage
5 V
output current
< 1 A
operating temperature
-55 to 125 C
radiation tolerance
100 krad
export control


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