VRG8687 Datasheet, PDF (1/7 Pages) Aeroflex Circuit Technology – Dual Voltage Regulator, 3.0 Amp, Positive Low Dropout (LDO), Adjustable Radiation Tolerant

Standard Products
Datasheet
VRG8687/VRG8688
Dual Voltage Regulator, 3.0 Amp, Positive
Low Dropout (LDO), Adjustable
Radiation Tolerant
www.aeroflex.com/voltreg
April 9, 2014
FEATURES
❑ Manufactured using
Space Qualified RH1084 die
❑ Radiation performance
- Total dose > 100 krad (Si),
Dose rate = 50 - 300 rads(Si)/s
❑ Two-Independent voltage regulators
❑ Thermal shutdown
❑ Output voltage adjustable: 1.25V to 23V
❑ Dropout voltage: 1.80V at 3.0Amps
❑ 3-Terminal
❑ Packaging – Hermetic metal
- Thru-hole or Surface mount
- 8 Leads, .755"L x .415"W x .200"Ht
- Power package
- Weight - 6 gm max
❑ Designed for aerospace and high reliability space
applications
❑ Output current: 3.0Amps
❑ Voltage reference: 1.25V +2%, -3.2%
❑ Load regulation: 0.35% max
❑ Line regulation: 0.25% max
❑ Ripple rejection: >60dB
❑ Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The Aeroflex Plainview VRG8687/8688 consists of two Positive Adjustable (RH1084) LDO voltage regulators each
capable of supplying 3.0Amps over the output voltage range as defined under recommended operating conditions. The
VRG8687/8688 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 VRG8687/8688 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 VRG8687/8688 has been specifically designed to meet exposure to radiation environments. The VRG8687 is
configured for a Thru-Hole 8 lead metal power package and the VRG8688 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 VRG8687/8688 is ideal for demanding military and space applications.
Dropout (VIN - VOUT) decreases at lower load currents for both regulators.
SCD8687 Rev C
1
5
ADJ_1
ADJ_2
2
VOUT_1
VOUT_2
6
RH1084
Positive
Regulator
RH1084
Positive
Regulator
3
SENSE_1
SENSE_2
7
VIN_1
VIN_2
8
4
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC