RH3080MK - Radiation Hardened Adjustable 0.9A Single Resistor Low Dropout Regulator

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.

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

Features

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
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