SCD8651 Rev D
❑Manufactured using Linear Technology Corporation ® Space Qualified RH1086 and RH1185 die
❑Radiation performance
- Total dose > 100 krad (Si)
❑Two-Independent voltage regulators
❑Thermal shutdown
❑Adjustable Output Voltages
❑Positive regulator features (RH1086)
– Output voltage adjustable: 1.25V to 23V
– Dropout voltage: 1.55V at 1.5Amps
– 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
❑Packaging – Hermetic metal
– Thru-hole or Surface mount
– 8 Leads, .75" x .42" x .200"
– Power package
– Weight - 6 gm max
❑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
❑Designed for aerospace and high reliability space
applications
❑DSCC SMD: 5962-09201 Pending
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 (VIN - VOUT) decreases at lower load currents for both regulators.
For detailed performance characteristic curves, applications information and typical applications see the
latest Linear Technology Corporation ®data sheets for their RH/LT1086 and RH/LT1185, which is available
on-line at www.linear.com.
V
IN
A
DJ
V
OUT
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
February 27, 2009
Standard Products
NOTE: Aeroflex Plainview does not currently have a
7
Positive
Regulator
FEATURES
6
GND
V
OUT
RH1185
Feedback
V
IN
2
3
5
RH1086
Positive
Regulator
Negative
Regulator
4
Reference
8
1
DSCC certified Radiation Hardened Assurance Program
Radiation Tolerant
VRG8651/VRG8652
Low Drop Out(LDO)Adjustable Voltage Regulators
Positive and Negative
www.aeroflex.com/voltreg
2
SCD8651 Rev D 2/27/09 Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
PARAMETER RANGE UNITS
RH1086 RH1185
Input Voltage 25+VREF -35 VDC
Lead temperature (soldering 10 Sec) 300 °C
Input Output Differential 25 30 VDC
Feedback & Reference Voltage - -7 VDC
Output Voltage +25 -30 VDC
ESD 2000 1/ V
Operating Junction Temperature Range -55 to +150 °C
Storage Temperature Range -65 to +150 °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 RANGE UNITS
RH1086 RH1185
Output Voltage Range 1.275 to 23 -2.45 to -25 VDC
Input Output Differential 1.5 to 25 1 to 28 VDC
Case Operating Temperature Range -55 to +125 °C
Thermal Resistance, Junction to case θjc 5°C/W
ELECTRICAL PERFORMANCE CHARACTERISTICS 2/
PARAMETER SYM CONDITIONS (P ≤PMAX)M I N M A X U N I T S
RH1086 Positive LDO section only
Reference Voltage 3/VREF 1.5V < VIN - VOUT < 15V, ILOAD = 10mA 1.210 1.275 V
Line Regulation 3/ILOAD = 10mA, 1.5V < VIN - VOUT < 15V - 0.25 %
Load Regulation 3/10mA < IOUT < 1.0A, VIN - VOUT = 3V - 0.3 %
Dropout Voltage 4/VDROP ΔVREF = 1%, IOUT = 1.0A -1.30V
Adjust Pin Current - - 120 µA
Adjust Pin Current Change - 10 mA < IOUT < 1.0A, 1.5V < VIN - VOUT < 15V - 5 µA
Current Limit IMAX VIN - VOUT = 5V
VIN - VOUT < 25V
1.0
0.047
-
-
A
A
Minimum Load Current 5/IMIN VIN - VOUT = 25V - 10 mA
Ripple Rejection 3/-
IOUT = 1.0A, VIN - VOUT = 3V, f = 120Hz,
CADJ = COUT = 25µF 60 - dB
Thermal Regulation 30ms pulse, TC = +25°C - 0.04 %/W
VREF Long-Term Stability 5/ Burn In: TC = +125°C @ 1000hrs minimum, tested @ 25°C - 0.3 %
ΔVOUT
ΔVIN
ΔVOUT
ΔIOUT
3
SCD8651 Rev D 2/27/09 Aeroflex Plainview
RH1185 Negative LDO section only 1/, 9/
Reference Voltage
(At pin 6) 9/VREF 1mA < IOUT < 3A, VIN - VOUT = 1.2V to 28V, VOUT = -5V -2.29 -2.45 V
Dropout Voltage 6/VDROP
IOUT = 0.5A, VOUT = -5V -0.425V
IOUT = 3A, VOUT = -5V -1.05V
Line Regulation 10/1.0V < VIN - VOUT < 20V, VOUT = -5V - 0.02 %/V
Load Regulation 10/5mA < IOUT < 3A, VIN - VOUT = 1.5V to 10V, VOUT = -5V - 0.8 %
Minimum Input Voltage 7/VIN MIN IOUT = 3A , VOUT = VREF - -4.50 V
Internal Current Limit (See
Graph for Guaranteed Curve -
See Figure 6)
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 ILIM
RLIM = 5KΩ 12/ 2.7 3.7 A
RLIM = 15KΩ 12/ 0.9 1.6 A
Quiescent Supply Current 8/IQIOUT = 5mA, VOUT = VREF, -4V < VIN < -25V - 3.5 mA
Supply Current
Change with Load IQΔ
VIN – VOUT = VSAT 11/ - 35 mA/A
VIN – VOUT ≥ 2V -21mA/A
Ripple Rejection - IOUT = 1.0A, VIN - VOUT = 3V, f = 120Hz, 60 - dB
Thermal Regulation (See
application information
LT1185) 5/
-VIN –VOUT = 10V, IOUT = 5mA to 2A, TC = +25°C - 0.014 %/W
Notes
1. Meets ESD testing per MIL-STD-883, method 3015, Class 2.
2. Unless otherwise specified, these specifications apply for post radiation and -55°C < Tc < +125°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; VDROPOUT = 0.25V + (0.25Ω 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 +(0.25Ω x IOUT).
12. Current limit is programmed with a resistor from REF pin to GND pin. RLIM = 15KΩ/ILIM.
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
ELECTRICAL PERFORMANCE CHARACTERISTICS 2/ (con’t)
PARAMETER SYM CONDITIONS (P ≤PMAX)M I N M A X U N I T S
ΔVOUT
ΔVIN
ΔVOUT
ΔIOUT
4
SCD8651 Rev D 2/27/09 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 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 (ΘJC) of 5°C/W.
5
SCD8651 Rev D 2/27/09 Aeroflex Plainview
FIGURE 4 – RH1185 DROPOUT VOLTAGE FIGURE 3 – RH1086 DROPOUT VOLTAGE
FIGURE 5 – RH1086 SHORT CIRCUIT CURRENT FIGURE 6 – RH1185 INTERNAL CURRENT LIMIT
See Note 13, pg 3.
TYPICAL CURVETYPICAL CURVE
OUTPUT CURRENT (A)
0
0
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
1
2
0.5 11.5
T
J
= –55°C
T
J
= 25°C
T
J
= 150°C
See Note 13, pg 3.
6
SCD8651 Rev D 2/27/09 Aeroflex Plainview
FIGURE 8 – BASIC RH1185 ADJUSTABLE REGULATOR APPLICATION
R1 & R2 LOCATION & PROPER CONNECTION OF
POSITIVE SENSE LEAD
FIGURE 7 – BASIC RH1086 ADJUSTABLE REGULATOR APPLICATION
VRG8651/52
VIN Vout
ADJ
R1
R2
VREF
10µF
Tant.
IADJ = 50µAVREF = 1.25V,
+Reg = VOUT = VREF (1+R2/R1) + (IADJ x R2)
87
1
10µF
Tant.
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.
V
OUT
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
SETTING OUTPUT VOLTAGE
+
–
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
VRG8651/52
(RH1185)
(RH1086)
7
SCD8651 Rev D 2/27/09 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 – 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
SCD8651 Rev D 2/27/09 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 – 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
SCD8651 Rev D 2/27/09
PLAINVIEW, NEW YORK
Toll Free: 800-THE-1553
Fax: 516-694-6715
SE AND MID-ATLANTIC
Tel: 321-951-4164
Fax: 321-951-4254
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Tel: 805-778-9229
Fax: 805-778-1980
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Tel: 949-362-2260
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Tel: 603-888-3975
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CENTRAL
Tel: 719-594-8017
Fax: 719-594-8468
www.aeroflex.com info-ams@aeroflex.com
Aeroflex Microelectronic Solutions reserves t he right 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 RH1185 & RH108 6 ar e a cop yright of Linear T ech no logy
ORDERING INFORMATION
MODEL DSCC SMD # SCREENING PACKAGE
VRG8651-S
-
Military Temperature, -55°C to +125°C
Screened in accordance with MIL-PRF-38534, Class K. 8 Lead Thru-Hole
Power Pkg
VRG8651-7 Commercial Flow, +25°C testing only
VRG8652-S Military Temperature, -55°C to +125°C
Screened in accordance with MIL-PRF-38534, Class K 8 Lead Surface
Mount Power Pkg
VRG8652-7 Commercial Flow, +25°C testing only
VRG8651-201-1S
VRG8651-201-2S
5962-0920101KUC
5962-0920101KUA
DSCC SMD 5962-09201 Pending
8 Lead Thru-Hole
Power Pkg
VRG8652-201-1S
VRG8652-201-2S
5962-0920101KZC
5962-0920101KZA
8 Lead Surface
Mount Power Pkg
