VRG8691 Datasheet, PDF (1/10 Pages) Aeroflex Circuit Technology – Adjustable 7.5A Positive LDO Regulator Radiation Tolerant

Standard Products
VRG8691/92
Adjustable 7.5A Positive LDO Regulator
Radiation Tolerant
www.aeroflex.com/voltreg
November 12, 2013
FEATURES
 Radiation performance
- Total dose: 100 krads(Si),
Dose rate = 50 - 300 rads(Si)/s
 Output voltage adjustable: 1.0V to 3.3V
 Output current: 7.5A
 Dropout voltage: 0.5V at 7.5Amps
 Voltage reference: 1.0V ±0.5%
 Load regulation: 0.5% max
 Line regulation: 0.2% max
 Ripple rejection: >80dB
 Enable Input - TTL / CMOS Compatible
 Slow Start capability
 Stable with multiple ceramic output capacitors
 Packaging – Hermetic metal
- Thru-hole or Surface mount
- 12 Leads, 0.900"L x 1.000"W x .205"Ht
- Power package
- Weight - 18 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 VRG8691/92 is capable of supplying in excess of 7.5Amps over the output voltage range as
defined under recommended operating conditions. The regulator is exceptionally easy to set-up, requiring only 2
external resistors to set the output voltage. The module design has been optimized for excellent regulation and low
drop-out voltage. Figures 2 through 5 illustrate setting output voltage, setting current limits and choosing a slow start
capacitor. The VRG8691/92 serves a wide variety of applications including local on-card regulation, programmable
output voltage regulation or precision current regulation.
The VRG8691/92 has been specifically designed to meet exposure to radiation environments. The VRG8691 is
configured for a Thru-Hole 12 lead metal power package and the VRG8692 is configured for a Surface Mount 12 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened to MIL-STD-883, the
VRG8691/92 is ideal for demanding military and space applications.
CURRENT LIMIT (ICL)
The VRG8691/92 features internal current limiting making them virtually blowout-proof against overloads. The limit
is nominally 11.5A @ Vin = 5V (see Table 2), but may be increased or decreased with the addition of one external
resistor (see Application Note 2).
1
VIN ₂
3
VBIAS 4
ENABLE 5
GND ⁶
VRG8691/92
12
11 VOUT
10
9 VSENSE
8 Current Limit
7 ^{Slow Start}
SCD8691 Rev H
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC