Standard Products
VRG8651/VRG8652
Dual Voltage Regulator, 1.0 Amp Pos and 3.0 Amp Neg
Low Dropout (LDO), Adjustable
Radiation Tolerant
www.aeroflex.com/voltreg
April 26, 2012
FEATURES
❑
❑
❑
❑
❑
Manufactured using
Space Qualified RH1086 and RH1185 die
❑
Packaging
– Hermetic metal
Radiation performance
– Thru-hole or Surface mount
- Total dose > 100 krad (Si),
– 8 Leads, .755"L x .415"W x .200"Ht
Dose rate = 50 - 300 rads(Si)/s
– Power package
Two-Independent voltage regulators
– Weight - 6 gm max
Thermal shutdown
❑
Designed for aerospace and high reliability space
Adjustable Output Voltages
applications
Positive
regulator features (RH1086)
– Output voltage adjustable: 1.25V to 23V
– Dropout voltage: 1.3V at 1.0 Amps
– 3-Terminal
– Output current: 1.0A, See note 13
– Voltage reference: 1.25V +2%, -3.2%
– Load regulation: 0.3% max
– Line regulation: 0.25% max
– Ripple rejection: >60dB
❑
❑
Negative
regulator features (RH1185)
– Output voltage adjustable: -2.37 to -25V
– Dropout voltage: 1.05V at 3Amps
– 5-Terminal
– Output current: 3A
– Voltage reference: -2.370V ±3%
– Load regulation: 0.8% max
– Line regulation: 0.02% max
– Ripple rejection: >60dB
❑
Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The Aeroflex Plainview VRG8651/8652 consists of one Positive Adjustable (RH1086) and one Negative Adjustable
(RH1185) LDO voltage regulator capable of supplying 1.0Amps (RH1086) /3Amps(RH1185) respectively over the
output voltage range as defined under recommended operating conditions. The VRG8651/8652 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 VRG8651/8652 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 VRG8651/8652 has been specifically designed to meet exposure to radiation environments. The VRG8651 is
configured for a Thru-Hole 8 lead metal power package and the VRG8652 is configured for a Surface Mount 8 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened to MIL-STD-883, the
VRG8651/8652 is ideal for demanding military and space applications.
Dropout (V
IN
- V
OUT
) decreases at lower load currents for both regulators.
1
A
DJ
RH1086
7
V
OUT
V
OUT
RH1185
V
IN
4
2
6
3
Reference
Feedback
V
IN
GND
8
Positive
Regulator
Negative
Regulator
5
SCD8651 Rev J
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Lead temperature (soldering 10 Sec)
Input Output Differential
Feedback & Reference Voltage
Output Voltage
DC Output Current
ESD
Operating Junction Temperature Range
Storage Temperature Range
25
-
+25
1.5
2000 1/
-55 to +150
-65 to +150
RANGE
RH1086
25+V
REF
300
30
-7
-30
-
RH1185
-35
UNITS
V
DC
°C
V
DC
V
DC
V
DC
A
V
°C
°C
1/ Meets ESD testing per MIL-STD-883, method 3015, Class 1C.
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
Case Operating Temperature Range
Thermal Resistance, Junction to case
jc
RANGE
RH1086
1.275 to 23
1.5 to 25
-55 to +125
5
RH1185
-2.45 to -25
1 to 28
UNITS
V
DC
V
DC
°C
°C/W
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, these specifications apply for post radiation and -55°C < Tc < +125°C.
PARAMETER
SYM
CONDITIONS (P
P
MAX
)
MIN
MAX
UNITS
RH1086 Positive LDO section only
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/ 14/
Minimum Load Current
Ripple Rejection 3/
Thermal Regulation
V
REF
Long-Term Stability 5/
SCD8651 Rev J 4/26/12
V
REF
1.5V < V
IN
- V
OUT
< 15V, I
LOAD
= 10mA
1.210
-
-
-
-
1.275
0.25
0.3
1.30
120
5
-
-
10
-
0.04
0.3
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
10mA < I
OUT
< 1.0A, V
IN
- V
OUT
= 3V
I
OUT
V
DROP
V
REF
= 1%, I
OUT
= 1.0A
-
-
I
MAX
5/
I
MIN
-
10 mA < I
OUT
< 1.0A, 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 @ 25°C
2
-
1.5
0.047
-
60
-
-
Aeroflex Plainview
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, these specifications apply for post radiation and -55°C < Tc < +125°C.
PARAMETER
SYM
CONDITIONS (P
P
MAX
)
MIN
MAX
UNITS
RH1185 Negative LDO section only 1/, 9/
Reference Voltage
(At pin 6) 2/ 9/
Dropout Voltage 2/ 6/
Line Regulation 2/ 10/
Load Regulation 2/ 10/
V
REF
V
DROP
1mA < I
OUT
< 3A, V
IN
- V
OUT
= 1.2V to 28V, V
OUT
= -5V -2.29
I
OUT
= 0.5A, V
OUT
= -5V
I
OUT
= 3A, V
OUT
= -5V
1.0V < V
IN
- V
OUT
< 20V, V
OUT
= -5V
5mA < I
OUT
< 3A, V
IN
- V
OUT
= 1.5V to 10V, V
OUT
= -5V
-
-
-
-
-
3.3
2.0
1.0
0.2
2.7
0.9
-
-
-
60
-
-2.45
0.425
1.05
0.02
0.8
-4.50
4.55
4.5
3.1
1.6
3.7
1.6
3.5
35
21
-
0.014
V
V
V
%/V
%
V
A
A
A
A
A
A
mA
mA/A
mA/A
dB
%/W
V
OUT
V
IN
V
OUT
I
OUT
Minimum Input Voltage 2/ 7/
V
IN MIN
I
OUT
= 3A , V
OUT
= V
REF
1.5V < V
IN
- V
OUT
< 10V
Internal Current Limit (See
Graph for Guaranteed Curve
- See Figure 6) 2/ 14/
I
CL
V
IN
- V
OUT
= 15V
V
IN
- V
OUT
= 20V
V
IN
- V
OUT
= 30V 5/
External Current Limit 2/
Quiescent Supply Current 2/
8/
Supply Current
Change with Load 2/
Ripple Rejection
Thermal Regulation (See
application information
LT1185) 5/
I
LIM
I
Q
I
Q
-
-
R
LIM
= 5K
12/
R
LIM
= 15K
12/
I
OUT
= 5mA, V
OUT
= V
REF
, -4V < V
IN
< -25V
V
IN
– V
OUT
= V
SAT
V
IN
– V
OUT
2V
I
OUT
= 1.0A, V
IN
- V
OUT
= 3V, f = 120Hz,
V
IN
–V
OUT
= 10V, I
OUT
= 5mA to 2A, T
C
= +25°C
11/
Notes
1. Meets ESD testing per MIL-STD-883, method 3015, Class 2.
2. Specification derated to reflect High Dose Rate (1019 condition A) to 100Krad (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. Dropout voltage is tested by reducing input voltage until the output drops 1% below its nominal value. Tests are done at 0.5A
and 3A. The power transistor looks basically like a pure resistance in this range so that minimum differential at any
intermediate current can be calculated by interpolation; V
DROPOUT
= 0.25V + (0.25 x I
OUT
). For load current less than 0.5A,
see Figure 4.
7. “Minimum input voltage” is limited by base emitter voltage drive of the power transistor section, not saturation as measured in
Note 6. For output voltages below 4V, “minimum input voltage” specification may limit dropout voltage before transistor
saturation limitation.
8. Supply current is measured on the ground pin, and does not include load current, R
LIM
, or output divider current.
9. The 25W power level is guaranteed for an input-output voltage of 8.3V to 17V. At lower voltages the 3A limit applies, and at
higher voltages the internal power limiting may restrict regulator power below 25W.
10. Line and load regulation are measured on a pulse basis with a pulse width of 2ms, to minimize heating. DC regulation will be
affected by thermal regulation and temperature coefficient of the reference.
11. V
SAT
is the maximum specified dropout voltage; 0.25V +(0.25 x I
OUT
).
12. Current limit is programmed with a resistor from REF pin to GND pin. R
LIM
= 15K/I
LIM
.
13. 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.
14. Pulsed @ <10% duty cycle @ +25°C.
SCD8651 Rev J 4/26/12
3
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
VRG8651/8652. 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 VRG8651/8652 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 VRG8651/8652 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.
SCD8651 Rev J 4/26/12
4
Aeroflex Plainview
See Note 13, pg 3.
FIGURE 3 – RH1086 DROPOUT VOLTAGE
TYPICAL CURVE
FIGURE 4 – RH1185 DROPOUT VOLTAGE
TYPICAL CURVE
See Note 13, pg 3.
FIGURE 5 – RH1086 SHORT CIRCUIT CURRENT
FIGURE 6 – RH1185 INTERNAL CURRENT LIMIT
SCD8651 Rev J 4/26/12
5
Aeroflex Plainview
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