Standard Products
VRG8662
Voltage Regulator, 1.0 Amp, Positive
Low Dropout (LDO), Adjustable
Radiation Tolerant
www.aeroflex.com/voltreg
April 24, 2012
FEATURES
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Manufactured using
Space Qualified RH1086 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 23V
Dropout voltage: 1.3V at 1.0Amps
3-Terminal
Output current: 1.0A (See Note 1, pg 2)
Voltage reference: 1.25V +2%, -3.2%
Load regulation: 0.3% max
Line regulation: 0.25% max
Ripple rejection: >60dB
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 VRG8662 consists of a Positive Adjustable (RH1086) LDO voltage regulator capable of
supplying 1.0Amps over the output voltage range as defined under recommended operating conditions. The VRG8662
offers excellent line and load regulation specifications and ripple rejection. Dropout (V
IN
- V
OUT
) decreases at lower
load currents.
The VRG8662 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 VRG8662 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 VRG8662 is ideal for demanding military and space applications.
3
ADJ
1
V
OUT
RH1086
Positive
Regulator
V
IN
2
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8662 Rev G
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
DC Output Current
Lead temperature (soldering 10 Sec)
Input Output Differential
Output Voltage
ESD (MIL-STD-883, M3015, Class 3A)
Operating Junction Temperature Range
Storage Temperature Range
NOTICE:
RANGE
+25+V
REF
1.5
300
25
+25
4000
-55 to +150
-65 to +150
UNITS
V
DC
A
°C
V
DC
V
DC
V
°C
°C
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
Input Output Differential
Case Operating Temperature Range
RANGE
1.275 to 23
1.5 to 25
-55 to +125
UNITS
V
DC
V
DC
°C
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, -55°C < Tc < +125°C.
CONDITIONS (P
P
MAX
)
10mA < I
OUT
< 1.0A, 1.5V < V
IN
- V
OUT
< 15V
PARAMETER
Reference Voltage 2/ 3/
Line Regulation 2/ 3/
Load Regulation 2/ 3/
Dropout Voltage 2/ 4/
Adjust Pin Current 2/
Adjust Pin Current Change 2/
Current Limit 2/ 6/
Minimum Load Current 5/
Ripple Rejection 3/
Thermal Regulation
V
REF
Long-Term Stability 5/
Thermal Resistance
(Junction to Case)
SYM
V
REF
MIN
1.210
-
-
-
-
-
1.5
0.047
-
60
-
-
-
MAX
1.275
0.25
0.40
1.30
120
5
-
-
10
-
0.04
0.30
3
UNITS
V
%
%
V
µA
µA
A
A
mA
dB
%/W
%
°C/W
V
OUT
I
LOAD
= 10mA, Tj = +25°C,
V
IN
1.5V < V
IN
- V
OUT
< 15V
V
OUT
I
OUT
V
DROP
-
-
I
MAX
I
MIN
-
-
-
10mA < I
OUT
< 1.0A, (V
IN
- V
OUT
) = 3V
DV
REF
= 1%, I
OUT
= 1.0A
-
10 mA < I
OUT
< 1A, 1.5V < V
IN
- V
OUT
< 15V
V
IN
- V
OUT
= 5V
V
IN
- V
OUT
> 25V
V
IN
- V
OUT
= 25V
I
OUT
= 1.0A, (V
IN
- V
OUT
) = 3V, f = 120Hz,
C
ADJ
= C
OUT
= 25µF
30ms pulse, T
C
= +25°C
Burn In: T
C
= +125°C @ 1000hrs min. Tested at +25°C only.
-
JC
Notes:
1/ For compliance with MIL-STD- 883 revision C current density specification, the RH1086MK is derated to 1 Amp but is capable of 1.5 Amps.
2/ Specification derated to reflect Total Dose exposure to 100 Krad (Si) @+25°C
3/ Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input/output
differential voltage and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range.
4/ Dropout voltage is specified over the full output current range of the device.
5/ Not tested. Shall be guaranteed by design, characterization, or correlation to other tested parameters.
6/ Pulsed @ <10% duty cycle @+25°C for characterization only. (See note 1)
SCD8662 Rev G 4/24/12
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 VRG8662. The graph above
represents the achievable power before the chip shuts down. The line in the graph represents the maximum power dissipation of
the VRG8662 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
SCD8662 Rev G 4/24/12
3
Aeroflex Plainview
See Note 1, pg 2.
See Note 4, pg 2.
FIGURE 3 – RH1086 SHORT CIRCUIT CURRENT
FIGURE 4 – RH1086 TYPICAL DROPOUT
VOLTAGE CURVE
V
IN
2
VRG8662
1
Vout
R1
10µF
Tant
.
V
REF
V
REF
= 1.25V, I
ADJ
= 50µA
3
ADJ
+Reg = V
OUT
= V
REF
(1+R2/R1) + (I
ADJ
x R2)
R2
FIGURE 5 – BASIC RH1086 ADJUSTABLE REGULATOR APPLICATION
SCD8662 Rev G 4/24/12
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
NOTES:
1. Package & Lid are electrically isolated from signal pads
2. ESD symbol denotes Pin 1
FIGURE 6 – PACKAGE OUTLINE — SURFACE MOUNT
SCD8662 Rev G 4/24/12
5
Aeroflex Plainview
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