Standard Products
VRG8660
Adjustable Regulator
Positive Voltage
Radiation Tolerant
www.aeroflex.com/voltreg
April 12, 2012
FEATURES
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Manufactured using
Space Qualified RH117 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
Thermal shutdown
Output voltage adjustable: 1.25V to 37V
3-Terminal
Output current: 1.5A
Voltage reference: 1.25V ±4%
Load regulation: 1.9% max
Line regulation: 0.06%/V max
Ripple rejection: >66dB
Packaging – Hermetic Ceramic
- SMD-0.5 Surface mount
- 3 Pads, .400"L x .296"W x .120"Ht
- Power package
- Weight - 2 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 VRG8660 consists of a Positive Adjustable (RH117) voltage regulator capable of supplying
1.5Amps over the output voltage range as defined under recommended operating conditions. The VRG8660 offers
excellent line and load regulation specifications and ripple rejection. The VRG8660 serves a wide variety of
applications including High Efficiency Linear Regulators, Post Regulators for Switching Supplies, Constant Current
Regulators, Battery Chargers and Microprocessor Supply.
The VRG8660 has been specifically designed to meet exposure to radiation environments and is configured for a
SMD-0.5 SMT power package. It is guaranteed operational from -55°C to +125°C. Available screened to
MIL-STD-883, the VRG8660 is ideal for demanding military and space applications.
Dropout (V
IN
- V
OUT
) decreases at lower load currents.
3
ADJ
1
V
OUT
RH117
Positive
Regulator
V
IN
2
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8660 Rev F
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Lead temperature (soldering 10 Sec)DC
Input-Output Voltage Differential
ESD
Operating Junction Temperature Range
Storage Temperature Range
RANGE
300
40
1.999
1/
UNITS
°C
V
DC
KV
°C
°C
-55 to +150
-65 to +150
1/ Meets ESD testing per MIL-STD-883, method 3015, Class 1C.
NOTICE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rating only;
functional operation beyond the "Operation Conditions" is not recommended and extended exposure beyond the "Operation Conditions"
may effect device reliability.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Output Voltage Range
Case Operating Temperature Range
RANGE
1.25 to 37
-55 to +125
UNITS
V
DC
°C
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified -55°C < T
C
< +125°C & (V
IN
-V
OUT
) = 5V, I
OUT
= 0.5A
PARAMETER
Reference Voltage 1/ 5/
Line Regulation 1/ 2/
SYM
V
REF
CONDITIONS (P
P
MAX
)
3V < (V
IN
- V
OUT
) < V
DIFF MAX
, 10mA < I
OUT
< I
MAX
3V < (V
IN
- V
OUT
) < V
DIFF MAX
,
I
OUT
= 10mA
10mA < I
OUT
< I
MAX
, V
OUT
< 5V
10mA < I
OUT
< I
MAX
, V
OUT
> 5V
I
OUT
= 1.5A, (V
IN
- V
OUT
) = 13.3V,
20ms Pulse, 20W, T
C
= +25°C
V
OUT
= 10V, f = 120Hz, C
ADJ
= 10µF
-
10mA < I
OUT
< I
MAX
3V < (V
IN
- V
OUT
) < 40V,
(V
IN
- V
OUT
) = 40V
(V
IN
- V
OUT
) < 15V
(V
IN
- V
OUT
) = 40V, T
C
= +25°C
T
A
= +125°C
-
MIN
1.20
-
-
-
-
66
-
-
-
1.50
0.30
-
-
MAX
1.30
0.06
60
1.2
0.07
-
100
5
5
-
-
1
3
UNITS
V
%/V
mV
%
%/W
dB
µA
µA
mA
A
%
°C/W
V
OUT
V
IN
V
OUT
I
OUT
-
-
I
ADJ
Load Regulation 1/ 2/
Thermal Regulation
Ripple Rejection Ratio
Adjustment Pin Current 1/
Adjustment Pin Current
Change 1/
Minimum Load Current 1/ 3/
Current Limit 1/ 4/
I
ADJ
I
MIN
I
MAX
Long Term Stability 3/
Thermal Resistance
(Junction to Case) 3/
V
OUT
T
IME
JC
Notes:
1/ Specification derated to reflect Total Dose exposure to 100Krad (Si) @ +25°C.
2/ Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating
effects are covered under the specification for thermal regulation. Measurements taken at the output lead must be adjusted for lead resistance.
3/ Not tested. Shall be guaranteed to the specified limits.
4/ Pulsed at <10% duty cycle @ 25°C.
5/ Testing over 12 watts is not performed over + 25°C.
SCD8660 Rev F 4/12/12
2
Aeroflex Plainview
60
50
40
Maximum Power
Dissipation
(Watts)
30
20
10
0
0
20
40
60
80
100
120
140
Case Temperature (°C)
The maximum Power dissipation is limited by the thermal shutdown function of the regulator chip in the VRG8660.
The graph above represents the achievable power before the chip shuts down. The line in the graph represents the
maximum power dissipation of the VRG8660 This graph is based on the maximum junction temperature of 150°C
and a thermal resistance (
JC
) of 3°C/W.
FIGURE 2 – MAXIMUM POWER vs CASE TEMPERATURE
SCD8660 Rev F 4/12/12
3
Aeroflex Plainview
V
IN
V
REF
= 1.25V,
I
ADJ
= 50µA
V
OUT
= V
REF
(1+R2/R1) + (I
ADJ
x R2)
2
VRG8660
1
V
OUT
R1
3
ADJ
R2
Adjustable Regulator
FIGURE 3 - TYPICAL APPLICATIONS
FIGURE 4 - TYPICAL CURRENT LIMIT
SCD8660 Rev F 4/12/12
4
Aeroflex Plainview
.301
MAX
.095
2 Places
R.025 MAX
6 Places
.030 MIN
.005
2
3
.120
2 Places
.405
MAX
.030
MIN
1
.225
4X R.020
.015
3 Places
.127
MAX
.150
.005
.286
.005
NOTE: 1. Package And Lid are electrically isolated from signal pads
.
FIGURE 5 – PACKAGE OUTLINE— SURFACE MOUNT
SCD8660 Rev F 4/12/12
5
Aeroflex Plainview
FPGA/CPLD
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