RH3080 - Radiation Hardened Adjustable 0.9A Single Resistor Low Dropout Regulator


  • MIL-PRF-38535 Class V Compliant Dice
  • Outputs May be Paralleled for Higher Current and Heat Spreading
  • Output Current: 0.9A
  • Single Resistor Programs Output Voltage
  • 1% Initial Accuracy of SET Pin Current
  • Output Adjustable to 0V
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Wide Input Voltage Range: 1.2V to 36V
  • Low Dropout Voltage: 270mV at 0.5A load current
  • <0.005%/V Line Regulation
  • Minimum Load Current: 0.6mA
  • Stable with 2.2μF Minimum Ceramic Output Capacitor
  • Current Limit with Foldback and Overtemperature Protected

Radiation Performance

  • Total Ionizing Dose (TID) Tolerance, per TM1019.8, MIL-STD-883:
    - 200kRad (Si), per condition A at 50Rads(Si)/sec
    - 100kRad (Si), per condition D at 10mRads(Si)/sec
    - ELDRS Pass 100kRad(Si)
  • Displacement Damage Defect (DDD) up to 1E12 Neutrons/cm2
  • Single Event Latchup (SEL) Threshold Linear Energy Transfer (LET) ≥110MeV.cm2/mg at TCASE = 100°C

Typical Application

RH3080MK Typical Application


The RH3080 is a 0.9A low dropout linear regulator with a unique architecture featuring a precision current source and voltage follower which allows the output to be programmed to any voltage between zero and 36V. Multiple regulators can be paralleled to increase total output current and spread heat over a system PC board with no need for heat sinking. The pass transistor collector can be brought out independently of the circuit supply voltage to allow dropout voltage to approach the saturation limit of the pass transistor. A small 2.2μF capacitor on the output with an ESR of less than 0.5Ω is adequate to insure stability. Applications with large output load transients require a larger output capacitor value to minimize output voltage change. Input circuitry insures output safe operating area current limiting and thermal shutdown protection. The rated output current of an RH3080-based part is fixed by internal wire length/resistance. Linear Technology dice element evaluations are based on parts rated for 0.9A output current.

Third Party Vendor Availability

Linear Technology partners with third party vendors who assemble and test packaged products with LTC RH Dice inside.

For MSK prefix products please click on the Part Number in the table below and scroll down the linked page to find the part number.

Part Number Description SCD or SMD#
MSK5979RH 0.9A Adjustable, LDO Regulator Split Bias -
MSK5978RH 0.7A Adjustable, LDO Regulator, Split Bias -
MSK5953RH Dual 1A Adjustable LDO Regulator, Split Bias -
MSK5980RH 0.7A Adjustable, LDO Regulator, Split Bias (Replaces MSK5978RH) -
VRG8666 1A Adjustable LDO Regulator, Split Bias View
VRG8667 Dual 1A Adjustable LDO Regulator, Split Bias View
VRG8668 Dual 1A Adjustable LDO Regulator, Split Bias View


For complete and up to date package information and drawings, please refer to our packaging page

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards


  • High Efficiency Linear Regulators
  • Constant Voltage/Current Regulators
  • Programmable Current Source/Sink
  • Space System Power Supplies
  • Switching Power Supply Post Regulators
  • Very Low Voltage Power Supplies 

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