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The Texas Instruments LM117QML-SP is a 3-terminal, positive voltage linear regulator that can supply 0.5A or 1.5A over a 1.2-37V output range.

The component is flight-proven, radiation-hardness-assured (RHA), and designed for simple operation, requiring only two external resistors to set the output voltage.

The regulator is 'floating' and sees only the input-to-output differential voltage. This enables the regulation of supplies of several hundred volts, provided the maximum input-to-output differential is not exceeded.

The LM117QML-SP offers full overload protection for safe areas, current limits, and thermal overload.

The device is designed to be highly versatile and can be used as a precision current regulator, programmable output regulator, or an adjustable switching regulator.

In addition, for high voltage applications the LM117HVQML-SP is a pin-to-pin drop-in replacement that can be used for voltages up to 60V. For the negative complement of the LM117QML-SP, please see the Texas Instruments LM137QML-SP.


Orderable Part Numbers

Key features

  • Radiation hardness assured (RHA) up to a total ionizing dose (TID) of 100 krad(Si)
    • High dose rate (HDR) option at 50-300 rad(Si)/s
    • Low dose rate (LDR) option at 10 mrad(Si)/s
  • Specified 0.5-A or 1.5-A output current options
  • Adjustable output down to 1.2 V
  • Current limit constant with temperature
  • Output is short-circuit protected

Testing & qualification

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Last updated: 2021-12-21


Radiation-hardness-assured (RHA), 4.2-V to 40-V, 1.5-A adjustable-output linear regulator



input voltage
4.2 to 40 V
output voltage
1.25 to 37 V
output current
< 1.5 A
operating temperature
-55 to 125 C
radiation tolerance
100 krad
export control


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