VRG8666 Datasheet, PDF (1/6 Pages) Aeroflex Circuit Technology – Voltage Regulator, 1.0 Amp, Positive Ultra Low Dropout (ULDO), Adjustable Radiation Tolerant

Standard Products
Datasheet
VRG8666
Voltage Regulator, 1.0 Amp, Positive
Ultra Low Dropout (ULDO), Adjustable
Radiation Tolerant
www.aeroflex.com/voltreg
February 29, 2016
FEATURES
 Manufactured using
Space Qualified RH3080 die
 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
 Current Limit with Foldback and Over-temperature protection
 Output voltage adjustable: 0V to 36V
 Outputs may be paralleled for higher current
 Post Radiated Dropout voltage:
 0.60V @ 1.0Amps
 0.39V @ 0.5Amps
 Output current: 1.0Amps
 Packaging – Hermetic Ceramic
 Hermetic Surface Mount Power
 5 Pads, .545"L x .296"W x .120"Ht
 Weight - 2.0 gm max
 Designed for aerospace and high reliability space applications
 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.
Dropout (VIN - VOUT) decreases at lower load currents.
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.
3
SCD8666 Rev L
SET
5
OUT
VCONTROL
4
RH3080
Positive Regulator
2
SENSE
IN
1
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC