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Cobham Semiconductor - Voltage Regulator

Numéro de référence VRG8668
Description Voltage Regulator
Fabricant Cobham Semiconductor 
Logo Cobham Semiconductor 





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VRG8668 fiche technique
Voltage Regulator
VRG8667/68
Dual 1A ULDO Adjustable Positive Voltage Regulators
Released Datasheet
Cobham.com/HiRel
March 24, 2016
The most important thing we build is trust
FEATURES
Manufactured using
Space Qualified RH3080 die
Radiation performance
Total dose: 100 krad(Si), Dose rate = 50 - 300 rad(Si)/s
ELDRS:
50 krad(Si), Dose rate < 0.01 rad(Si)/s
Two-Independent voltage regulators
Current Limit with Foldback
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 Meter Power Package
Thru-hole or Surface mount
8 Leads, .755"L x .415"W x .200"Ht
Weight - 6 gm max
Designed for aerospace and high reliability space applications
Radiation Hardness Assurance Plan: DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The VRG8667/8668 consists of two Positive Adjustable (RH3080) ULDO voltage regulators each capable of
supplying 1.0Amps over the output voltage range as defined under recommended operating conditions. The
VRG8667/8668 offers excellent line and load regulation specifications and ripple rejection. There is full electrical
isolation between the regulators and each regulator to the package.
The VRG8667/8668 has been specifically designed to meet exposure to radiation environments. The VRG8667 is
configured for a Thru-Hole 8 lead metal power package and the VRG8668 is configured for a Surface Mount 8 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened in accordance with
MIL-PRF-38534, the VRG8667/8668 is ideal for demanding military and space applications.
Dropout (VIN - VOUT) decreases at lower load currents for both regulators.
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.
1
3
VCONTROL_1
VCONTROL_2
2 VIN_1
VIN_2
4
RH3080
Positive
Regulator
RH3080
Positive
Regulator
7 OUT_1
OUT_2
5
SET_1
SET_2
SCD8667
Rev E
86
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
1 Cobham Semiconductor Solutions
www.cobham.com/HiRel

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