Standard Products
VRG8657/VRG8658
Dual Voltage Regulator, 1.0 Amp, Positive
Low Dropout (LDO), Adjustable
Radiation Tolerant
www.aeroflex.com/voltreg
May 15, 2012
FEATURES
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Manufactured using
Space Qualified RH1086 die
Radiation performance
- Total dose > 100 krad (Si)
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Packaging – Hermetic metal
- Thru-hole or Surface mount
Two-Independent voltage regulators
- 6 Leads, .655"L x .415"W x .200"Ht
Thermal shutdown
- Power package
Output voltage adjustable: 1.25V to 23V
- Weight - 5 gm max
Dropout voltage: 1.3V at 1.0Amp
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Designed for aerospace and high reliability space
3-Terminal
applications
Output current: 1.0Amp
Voltage reference: 1.25V +2%, -3.2%
Load regulation: 0.3% 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 VRG8657/8658 consists of two Positive Adjustable (RH1086) LDO voltage regulators each
capable of supplying 1.0Amps over the output voltage range as defined under recommended operating conditions. The
VRG8657/8658 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 VRG8657/8658 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 VRG8657/8658 has been specifically designed to meet exposure to radiation environments. The VRG8657 is
configured for a Thru-Hole 6 lead metal power package and the VRG8658 is configured for a Surface Mount 6 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened to MIL-STD-883, the
VRG8657/8658 is ideal for demanding military and space applications.
Dropout (V
IN
- V
OUT
) decreases at lower load currents for both regulators.
1
ADJ
2
V
OUT
RH1086
Positive
Regulator
V
IN
3
ADJ
V
OUT
RH1086
Positive
Regulator
V
IN
4
6
5
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8657 Rev K
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Lead temperature (soldering 10 Sec)
Input Output Differential
Output Voltage
DC Output Current
ESD (MIL-STD-883, M3015, Class 3A)
Operating Junction Temperature Range
Storage Temperature Range
RANGE
25+V
REF
300
25
+25
1.5
>4000
-55 to +150
-65 to +150
UNITS
V
DC
°C
V
DC
V
DC
A
V
°C
°C
NOTICE: Stresses above those listed under "Absolute Maximums Rating" 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
3/
Case Operating Temperature Range
Thermal Resistance, Junction to case
JC
Unless otherwise specified, -55°C<T
C
<+125°C
CONDITIONS (P
P
MAX
)
1.5V < V
IN
- V
OUT
< 15V, 10mA < I
OUT
< 1.0A
RANGE
1.275 to 23
1.5 to 25
-55 to +125
5
UNITS
V
DC
V
DC
°C
°C/W
ELECTRICAL PERFORMANCE CHARACTERISTICS
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/
SYM
V
REF
MIN
1.210
-
-
-
-
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 minimum, tested @
25°C
-
1.5
0.047
-
60
-
-
MAX
1.275
0.25
0.3
1.30
120
5
-
-
10
-
0.04
0.3
UNITS
V
%
%
V
µA
µA
A
A
mA
dB
%/W
%
V
OUT
I
LOAD
= 10mA, 1.5V < V
IN
- V
OUT
< 15V
V
IN
V
OUT
I
OUT
V
DROP
-
-
I
MAX
I
MIN
-
-
-
10mA < I
OUT
< 1.0A, V
IN
- V
OUT
= 3V
V
REF
= 1%, I
OUT
= 1.0A
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.
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 (See Note 1).
SCD8657 Rev K 5/15/12
2
Aeroflex Plainview
60
50
40
Maximum Power
Dissipation
(Watts)
30
20
Both Regulators
1 Regulator
10
0
0
20
40
60
80
100
120
140
Case Temperature (°C)
FIGURE 2 – MAXIMUM POWER vs CASE TEMPERATURE
The maximum Power dissipation is limited by the thermal shutdown function of each regulator chip in the
VG8657/8658. The graph above represents the achievable power before the chip shuts down. The first line in the
graph represents the maximum power dissipation of the VG8657/8658 with one regulator on (the other off) and the
other line represents both regulators on dissipating equal power. If both regulators are on and one regulator is
dissipating more power that the other, the maximum power dissipation of the VG8657/8658 will fall between the two
lines. This graph is based on the maximum junction temperature of 150°C and a thermal resistance (
JC
) of 5°C/W.
SCD8657 Rev K 5/15/12
3
Aeroflex Plainview
See Note 1/, pg 2.
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
2
1
T
J
= – 55°C
T
J
= 25°C
T
J
= 150°C
0
0
See Note 1/, pg 2.
See Note 1, pg 2.
1
0.5
OUTPUT CURRENT (A)
1.5
FIGURE 3 – RH1086 SHORT CIRCUIT CURRENT
FIGURE 4 – RH1086 DROPOUT VOLTAGE
TYPICAL CURVE
V
IN
10µF
Tant
.
VRG8657/58
V
REF
ADJ
R1
Vout
10µF
Tant
.
V
REF
= 1.25V, I
ADJ
= 50µA
+Reg = V
OUT
= V
REF
(1+R2/R1) + (I
ADJ
x R2)
R2
FIGURE 5 – BASIC RH1086 ADJUSTABLE REGULATOR APPLICATION
SCD8657 Rev K 5/15/12
4
Aeroflex Plainview
TABLE I – PIN NUMBERS vs FUNCTION
PIN
1
2
3
4
5
6
FUNCTION
POS_ADJ_1
POS_VOUT_1
POS_VIN_1
POS_ADJ_2
POS_VIN_2
POS_VOUT_2
.200
.100
.108
.123
ø
.010
CBA
ø
.145 THRU
2x .028
MAX.
M
.150 REF.
6
5
4
2° MAX.
.415
.2075
–C–
R.065 TYP.
4 PLCS
1
2
3
.720 ±.020
MEASURED
LEAD TIP
ESD/PIN 1
IDENT
.230 MIN
.415 SQ
.655
–B–
.122
±.003
.220 MAX.
±.005
–A–
ø
.010
BCA
.040
.030 DIA.
±.002
ø
.010
M
CBA
Notes:
1. Dimension Tolerance: ±.005 inches
2. Package contains BeO substrate
3. Case electrically isolated
FIGURE 6 – PACKAGE OUTLINE — THRU-HOLE POWER PACKAGE
SCD8657 Rev K 5/15/12
5
Aeroflex Plainview
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