SCD8666 Rev L

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Manufactured using

Space Qualified RH3080 die

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Radiation performance

 Total dose: 100 krads(Si), Dose rate = 50 - 300 rads(Si)/s

 ELDRS:

50 krads(Si), Dose rate <

0.01 rads(Si)/s

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Current Limit with Foldback and Over-temperature protection

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Output voltage adjustable: 0V to 36V

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Outputs may be paralleled for higher current

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Post Radiated Dropout voltage:

 0.60V @ 1.0Amps

 0.39V @ 0.5Amps

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Output current: 1.0Amps

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Packaging – Hermetic Ceramic

 Hermetic Surface Mount Power

 5 Pads, .545"L x .296"W x .120"Ht

 Weight - 2.0 gm max

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Designed for aerospace and high reliability space applications

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Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.

DESCRIPTION

The Aeroflex Plainview VRG8666 consists of a Positive Adjustable (RH3080) ULDO voltage regulator

capable of supplying 1.0Amps over the output voltage range as defined under recommended operating

conditions. The VRG8666 offers excellent line and load regulation specifications and ripple rejection.

The VRG8666 serves a wide variety of applications including SCSI-2 Active Terminator, High Efficiency

Linear Regulators, Post Regulators for Switching Supplies, Constant Current Regulators, Battery Chargers

and Microprocessor Supply.

The VRG8666 has been specifically designed to meet exposure to radiation environments and is configured

for an SMD power package. It is guaranteed operational from -55°C to +125°C. Available screened to

MIL-STD-883, the VRG8666 is ideal for demanding military and space applications.

Input capacitance is required for load regulation. 1uF is recommended on Vin and Vcontrol. For stable

operation, a 0.1uF capacitor should be placed on Vset and a low ESR capacitor on Vout. See Figure 5.

For detailed performance characteristic curves, applications information and typical applications see the

latest

Linear Technology Corporation ® data sheets for their RH/LT3080, which is available

on-line at www.linear.com.

Radiation Tolerant

FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC

February 29, 2016

www.aeroflex.com/voltreg

Standard Products

FEATURES

VRG8666

Voltage Regulator, 1.0 Amp, Positive

Ultra Low Dropout (ULDO), Adjustable

1

IN

SET

OUT

3

5

RH3080

Positive Regulator

2

4

SENSE

Datasheet