SCD8653 Rev C
❑Manufactured using Linear Technology Corporation ® Space Qualified RH1084 and RH1185 die
❑Radiation performance
- Total dose > 100 krad (Si)
❑Two-Independent voltage regulators
❑Thermal shutdown
❑Adjustable Output Voltages
❑Positive regulator features (RH1084)
– Output voltage adjustable: 1.25V to 23V
– Dropout voltage: 1.80V at 3.0 A
– 3-Terminal
– Output current: 3.0A
– Voltage reference: 1.25V +2%, -3.2%
– Load regulation: 0.35% max
– Line regulation: 0.25% max
– Ripple rejection: >60dB
❑Packaging – Hermetic metal
– Thru-hole or Surface mount
– 8 Leads, .755"L x .415"W x .200"H t
– Power package
– Weight - 6 gm max
❑Designed for aerospace and high reliability space
applications
❑Negative regulator features (RH1185)
– Output voltage adjustable: -2.37 to -25V
– Dropout voltage: 1.05V at 3.0A
– 5-Termin al
– Output current: 3.0A
– Voltage reference: -2.370V ±3.5%
– Load regulation: 0.8% max
– Line regulation: 0.02% max
– Ripple rejection: >60dB
DESCRIPTION
The Aeroflex Plainview VRG8653/54 consists of one Positive Adjustable (RH1084) and one Negative Adjustable
(RH1185) LDO voltage regulator, both capable of supplying 3.0Aover the output voltage range as defined under
recommended operating conditions. The VRG8653/54 offers excellent line and load regulation specifications and
ripple rejection. There is full electrical isolation between the regulators and each regulator to the package.
Dropout (VIN - VOUT) decreases at lower load curr ents for both regulators.
The VRG8653/54 serves a wide variety of applications incl uding SCSI-2 Active Terminator, High Efficiency Linear
Regulators, Post Regulators for Switching Supplies, Constant Current Regulators, Battery Chargers and
Microprocessor Supply.
The VRG8653/54 has been specifically designed to meet exposure to radiation environments. The VRG8653 is
configured for a Thru-Hole 8 lead metal power package and the VRG8654 is configured for a Surface Mount 8 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened in accordance with
MIL-PRF-38534, the VRG8653/54 is ideal for demanding military and space applications.
For detailed performance characteristic curves, applications information and typical applications see the
latest Linear Technology Corporation®data sheets for their RH/LT1084 and RH/LT1185, which is available
on-line at www.linear.com.
V
IN
A
DJ
V
OUT
FIGURE 1 – SCHEMATIC
October 24, 2011
Standard Products
7
Positive
Regulator
FEATURES
6
GND
V
OUT
RH1185
FB
V
IN
2
3
5
RH1084
Positive
Regulator
Negative
Regulator
4
REF
8
1
Radiation Tolerant
VRG8653/VRG8654
Dual Voltage Regulator, 3.0
Amp, Positive
&
Negative
Low Dropout (LDO), Adjustable
www.aeroflex.com/voltreg
❑Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
2
SCD8653 Rev C 10/24/11 Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
PARAMETER RANGE UNITS
RH1084 RH1185
Input Voltage +25 -35 VDC
Lead temperature (soldering 10 Sec) 300 C
Input Output Differential 25 30 VDC
Load Current, maximum +6.0 -4.5 A
Feedback & Reference Voltage - -7 VDC
Output Voltage +25 -30 VDC
ESD (MIL-STD-883, M3015, Class 2) 2000 to 3999 V
Operating Junction Temperature Range -55 to +150 C
Storage Temperature Range -65 to +150 C
Thermal Resistance, Junction to case jc 5°C/W
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 RANGE UNITS
RH1084 RH1185
Output Voltage Range 1.25 to 23 -2.37 to -25 VDC
Input Output Differential 1.8 to 24 1.05 to 29 VDC
Case Operating Temperature Range -55 to +125 °C
ELECTRICAL PERFORMANCE CHARACTERISTICS
UNLESS OTHERWISE SPECIFIED: -5 5°C TC +125°C
PARAMETER SYM CONDITIONS (P PMAXM I N M A X U N I T S
RH1084 Positive LDO section only 1/
Reference Voltage 2/, 3/VREF 1.5V < (VIN - VOUT)< 15V, 10mA < IOUT < 3.0A 1.210 1.275 V
Line Regulation 2/, 3/ILOAD = 10mA, 1.5V < (VIN - VOUT) < 15V - 0.25 %
Load Regulation 2/, 3/10mA < IOUT < 3.0A, (VIN - VOUT) = 3V - 0.35 %
Dropout Voltage 2/, 4/VDROP VREF = 1%, IOUT = 3.0A -1.8V
Adjust Pin Current 2/- -120µA
Adjust Pin Current Change 2/ - 10 mA < IOUT < 3.0A, 1.5V < (VIN - VOUT) < 15V - 5 µA
Minimum Load Curren t 5/IMIN (VIN - VOUT) = 25V - 10 mA
Current Limit ICL (VIN - VOUT) = 5V 5.25 A
Ripple Rejection 3/-
IOUT = 3.0A, (VIN - VOUT) = 3V, f = 120Hz,
CADJ = COUT = 25µF 60 - dB
Thermal Regulation - 30ms pulse, TC = +25°C - 0.015 %/W
VREF Long-Term Stability 5/-Burn In: TC = +125°C@1000hrs mini mu m, tested @ 25°C - 1.0 %
VOUT
VIN
VOUT
IOUT
3
SCD8653 Rev C 10/24/11 Aeroflex Plainview
RH1185 Negative LDO section only 9/
Reference Voltage
(At pin 6) 2/VREF 1mA < IOUT < 3A, VIN - VOUT = 1.2V to 28V, VOUT = -5V -2.29 -2.45 V
Dropout Voltage 2/, 6/VDROP IOUT = 0.5A, VOUT = -5V -0.425V
IOUT = 3A, VOUT = -5V -1.05V
Line Regulation 2/, 10/1.0V < VIN - VOUT < 20V, VOUT = -5V - 0.02 %/V
Load Regulation 2/, 10/5mA < IOUT < 3A, VIN - VOUT = 1.5V to 10V, VOUT = -5V - 0.8 %
Minimum Input Voltage 2/, 7/VIN MIN IOUT = 3A , VOUT = VREF - -4.50 V
Internal Current Limit (S ee
Graph for Guaranteed Curve -
See Figure 6) 2/, 13/ICL
1.5V < VIN - VOUT < 10V 3.3 4.55 A
VIN - VOUT = 15V 2.0 4.5 A
VIN - VOUT = 20V 1.0 3.1 A
VIN - VOUT = 30V 5/0.21.6A
External Current Limit 2/ILIM RLIM = 5K, (VIN - VOUT) = 1.5V 12/ 2.7 3.7 A
RLIM = 15K, (VIN - VOUT) = 1.5V 12/ 0.9 1.6 A
Quiescent Supply Current 2/, 8/IQIOUT = 5mA, VOUT = VREF, -4V < VIN < -25V - 3.5 mA
Supply Current
Change with Load 2/IQVIN – VOUT = VSAT 11/ - 35 mA/A
VIN – VOUT 2V -21mA/A
Ripple Rejection - IOUT = 3.0A, VIN - VOUT = 3V, f = 120Hz, 60 - dB
Thermal Regulation (See
application information
LT1 185) 5/-V
IN –VOUT = 10V, IOUT = 5mA to 2A, TC = +25°C - 0.014 %/W
Notes
1/ The manufacturer’s output current rating for the RH1084MK positive regulator integrated circuit is 5.0 Amps. For Compliance with the
Current Density specifictation of MIL-STD-883 Rev. C, the electrical performance characteristics are specified at an output current of 3.0
Amps.
2/ Specification derated to reflect total dose exposure to 100krads (Si) at +25°C.
3/ Line and load regulation are guaranteed up to the maximum power dissipation of 25W. Power dissipation is determined by the inp ut/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; VDROPOUT = 0.25V + (0.25 x IOUT). 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, RLIM, 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/VSAT is the maximum specified dropout voltage; 0.25V +(0.25 x IOUT).
12/ Current limit is programmed with a resistor from REF pin to GND pin. RLIM = 15K/ILIM.
13/ Pulsed @ <10% duty cycle @ +25°C
ELECTRICAL PERFORMANCE CHARACTERISTICS (con’t)
UNLESS OTHERWISE SPECIFIED: -5 5°C TC +125°C
PARAMETER SYM CONDITIONS (P PMAXM I N M A X U N I T S
VOUT
VIN
VOUT
IOUT
4
SCD8653 Rev C 10/24/11 Aeroflex Plainview
FIGURE 2 – MAXIMUM POWER vs CASE TEMPERATURE
60
50
40
30
20
10
0 20 40 60 80 100 120 140
Case Temperature (°C)
1 Regulator
0
Both Regulators
Maximum Power
Dissipation
(Watts)
The maximum Power dissipation is limited by the thermal shutdown function of each regulator chip in the VRG8653/54. 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 VRG8653/54 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 VRG8653/54 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.
5
SCD8653 Rev C 10/24/11 Aeroflex Plainview
FIGURE 4 – RH1185 DROPOUT VOLTAGE
FIGURE 6 – RH1185 INTERNAL CURRENT LIMIT
TYPICAL CURVE
FIGURE 3 – RH1084 DROPOUT VOLTAGE
FIGURE 5 – RH1084 SHORT CIRCUIT CURRENT
TYPICAL CURVE
See Note 1/, pg 3.
6
SCD8653 Rev C 10/24/11 Aeroflex Plainview
FIGURE 8 – BASIC RH1185 NEGATIVE ADJUSTABLE REGULATOR APPLICATION
R1 & R2 LOCATION & PROPER CONNECTION OF
POSITIVE SENSE LEAD
FIGURE 7 – BASIC RH1084 POSITIVE ADJUSTABLE REGULATOR APPLICATION
VRG8653/54
VIN Vout
ADJ
R1
R2
VREF
22µF
Tant.
IADJ = 55µAVREF = 1.25V,
+Reg = VOUT = VREF (1+R2/R1) + (IADJ x R2)
87
1
SETTING OUTPUT VOLTAGE
(RH1084)
The RH1185 output voltage is set by two external resistors.
Internal reference voltage is trimmed to
2.37V so that a standard 1% 2.37k resistor (R1) can be
used to set divider current at 1mA. R2 is then selected
from:
for R1 = 2.37k and V
REF
= 2.37V, this reduces to:
V
R2 = 10 -3
OUT
– 2.37
suggested values of 1% resistors are shown.
VOUT R2 WHEN R1 = 2.37k
130Ω
930Ω
2.5V
5V
.3.3V
2.67k
k67.9V21
k7.21V51
R2 = (V
OUT
– 2.37) R1
V
REF
+
–
R1*
2.37k
R2
REF GND
FB
V
OUT
V
4
25
6
3
IN
RH1185
R
LIM
+
+
–
V
IN
C
1
V
OUT
LOAD
PARASITIC
LEAD RESISTANCES
– r
b
+
I
GND
r
a
*R1 SHOULD BE CONNECTED DIRECTLY TO GROUND LEAD, NOT TO THE LOAD,
SO THAT r
a
≈ 0Ω. THIS LIMITS THE OUTPUT VOLTAGE ERROR TO (I
GND
)(r
b
).
ERRORS CREATED BY r
a
ARE MULTIPLIED BY (1 + R2/R1). NOTE THAT V
OUT
INCREASES
WITH INCREASING GROUND PIN CURRENT. R2 SHOULD BE CONNECTED
DIRECTLY TO LOAD FOR REMOTE SENSING. C1 = C2 > 2µF Tantalum.
+
C
2
VRG8653/54
(RH1185)
10µF
Tant.
7
SCD8653 Rev C 10/24/11 Aeroflex Plainview
ø.145 THRU
.415
.2075
R.065 TYP.
4 PLCS
±.003
.220 MAX.
±.005
.040
±.002
.030 DIA.
.150 REF. 2° MAX. TYP.
±.020
.720
MEASURED
LEAD TIP
IDENT
–A–
–C–
ø.010 B C A
M
ø.010 C B A
FIGURE 9 – VRG8653 PACKAGE OUTLINE — THRU-HOLE POWER PACKAGE
TABLE I – PIN NUMBERS vs FUNCTION
PIN FUNCTION
1POS_ADJ_1
2NEG_REF_2
3NEG_V
OUT_2
4NEG_V
IN_2
5 NEG_GND_2
6 NEG_FB_2
7POS_V
OUT_1
8POS_V
IN_1
2x .028
M
ø.010 C B A
.230 MIN
Notes:
1. Dimension Tolerance: ±.005 inches
2. Package contains BeO substrate
3. Case electrically isolated
.122
MAX.
.108
.300
.100
.755
.515
ESD/PIN 1
–B–
4
567
32
8
1
.632
.090
8X
8
SCD8653 Rev C 10/24/11 Aeroflex Plainview
.108
.300
.100
ø.145 THRU
.415
.2075
R.065 TYP.
4 PLCS
.755
.515
±.003
.220 MAX.
±.005
.040
±.002
.030 DIA.
.122
.150 REF.
±.020.886
IDENT
ESD/PIN 1
–B–
–A–
–C–
ø.010 B C A
M
ø.010 C B A
Notes:
FIGURE 10 – VRG8654 PACKAGE OUTLINE — SURFACE MOUNT POWER PACKAGE
1. Dimension Tolerance: ±.005 inches
2. Package contains BeO substrate
4
567
32
TABLE II – PIN NUMBERS vs FUNCTION
PIN FUNCTION
1POS_ADJ_1
2NEG_REF_2
3NEG_V
OUT_2
4NEG_V
IN_2
5 NEG_GND_2
6 NEG_FB_2
7POS_V
OUT_1
8POS_V
IN_1
2x .028
M
ø.010 C B A
.020±.005
.060 ±.005
3. Case electrically isolated
MAX. 8
1
.632
.090
8X
9
SCD8653 Rev C 10/24/11
PLAINVIEW, NEW YORK
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Fax: 516-694-6715
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Tel: 321-951-4164
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www.aeroflex.com info-ams@aeroflex.com
Aeroflex Microelectronic Solutions reserves the righ t to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liab ility is assumed as a result of use of
this product. No patent licenses are implied.
EXPORT CONTROL: EXPOR T WARNING:
This product is controlled for export under the International Traffic in
Arms Regulations (ITAR). A license from the U.S. Department of
State is required prior to the export of this product from the United
States.
Aeroflex’s military and space products are controlled for export under
the International Traffic in Arms Regulations (ITAR) and may not be
sold or proposed or offered for sale to certain countries. (See ITAR
126.1 for complete information.)
Our passion for performance is defined by three
attributes represented by these three icons:
solution-minded, perform a nce -driven and cu stom e r-foc use d
and the Linear Technology logo are reg istered trad em a rks and RH1084 & RH1185 ar e a cop yright of Linear T ech no logy Cor pora tion.
ORDERING INFORMATION
MODEL DLA SMD # SCREENING PACKAGE
VRG8653-7 - Commercial Flow, +25°C te sting only
8 Lead
Thru-Hole
Power Pkg
VRG8653-S - Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8653-201-1S 5962-1021301KUC DLA SMD Pending
VRG8653-201-2S 5962-1021301KUA
VRG8654-7 - Commercial Flow, +25°C te sting only
8 Lead
Surface Mount
Power Pkg
VRG8654-S - Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8654-201-1S 5962-1021301KZC DLA SMD Pending
VRG8654-201-2S 5962-1021301KZA
