SCD8651 Rev J
❑Manufactured using Space Qualified RH1086 and RH1185 die
❑Radiation performance
- Total dose > 100 krad (Si),
Dose rate = 50 - 300 rads(Si)/s
❑Two-Independent voltage regulators
❑Thermal shutdown
❑Adjustable Output Voltages
❑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
❑Packaging – Hermetic metal
– Thru-hole or Surface mount
– 8 Leads, .755"L x .415"W x .200"Ht
– 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 3Amps
– 5-Terminal
– Output current: 3A
– Voltage reference: -2.370V ±3%
– Load regulation: 0.8% max
– Line regulation: 0.02% max
– Ripple rejection: >60dB
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.
V
IN
A
DJ
V
OUT
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
April 26, 2012
Standard Products
7
Positive
Regulator
FEATURES
6
GND
V
OUT
RH1185
Feedback
V
IN
2
3
5
RH1086
Positive
Regulator
Negative
Regulator
4
Reference
8
1
Radiation Tolerant
VRG8651/VRG8652
Dual
Volt age
Regulator,
1.0
Amp
Pos
and
3.0
Amp
Neg
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
SCD8651 Rev J 4/26/12 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
DC Output Current 1.5 - A
ESD 2000 1/V
Operating Junction Temperature Range -55 to +150 °C
Storage Temperature Range -65 to +150 °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 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 jc 5°C/W
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, these specifications apply for post radiation and -55°C < Tc < +125°C.
PARAMETER SYM CONDITIONS (P PMAX)MIN MAX UNITS
RH1086 Positive LDO section only
Reference Voltage 2/ 3/VREF 1.5V < VIN - VOUT < 15V, ILOAD = 10mA 1.210 1.275 V
Line Regulation 2/ 3/ILOAD = 10mA, 1.5V < VIN - VOUT < 15V - 0.25 %
Load Regulation 2/ 3/10mA < IOUT < 1.0A, VIN - VOUT = 3V - 0.3 %
Dropout Voltage 2/ 4/VDROP VREF = 1%, IOUT = 1.0A -1.30V
Adjust Pin Current 2/-- 120 µA
Adjust Pin Current Change
2/-10 mA < IOUT < 1.0A, 1.5V < VIN - VOUT < 15V - 5 µA
Current Limit 2/ 14/IMAX VIN - VOUT = 5V
VIN - VOUT < 25V
1.5
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 = 25µF60 - dB
Thermal Regulation 30ms pulse, TC = +25°C - 0.04 %/W
VREF Long-Term Stability 5/ Burn In: TC = +125°C @ 1000hrs min, tested @ 25°C - 0.3 %
VOUT
VIN
VOUT
IOUT
3
SCD8651 Rev J 4/26/12 Aeroflex Plainview
RH1185 Negative LDO section only 1/, 9/
Reference Voltage
(At pin 6) 2/ 9/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 (See
Graph for Guaranteed Curve
- See Figure 6) 2/ 14/
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 12/ 2.7 3.7 A
RLIM = 15K 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/IQ
VIN – VOUT = VSAT 11/-35mA/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. 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; 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. 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.
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified, these specifications apply for post radiation and -55°C < Tc < +125°C.
PARAMETER SYM CONDITIONS (P PMAX)MIN MAX UNITS
VOUT
VIN
VOUT
IOUT
4
SCD8651 Rev J 4/26/12 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 (JC) of 5°C/W.
5
SCD8651 Rev J 4/26/12 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
See Note 13, pg 3.
6
SCD8651 Rev J 4/26/12 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.
SETTING OUTPUT VOLTAGE
(RH1086)
T
he RH1185 output voltage is set by two external resistors.
The 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 VREF = 2.37V, this reduces to:
suggested values of 1% resistors are shown below:
R2 = (VOUT - 2.37) R1
VREF
R2 = VOUT - 2.37
VOUT R2 when R1 = 2.37k
2.5V 130
3.3V 930
5V 2.67k
12V 9.76k
15V 12.7k
Parasitic
R2 GND
FB
VIN VRG8651/52
(RH1185)
VOUT
*R1 should be connected directly to ground lead, not to the load, so
that ra = 0
.
This limits the output voltage error to (I
GND
)(rb). Errors
created by ra 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.
VIN
C1
+
–5
Lead Resistance
Load
24
1
3
RLIM ra
R2
R1*
2.37k
- rb +
IGND
+
+C2
VOUT
+
–
7
SCD8651 Rev J 4/26/12 Aeroflex Plainview
ø.145 THRU
.415
.2075
R.065 TYP.
4 PLCS
±.003
.220 MAX.
±.005
.040
±.002
.030 DIA.
.150 REF. 2° MAX.
±.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
1 POS_ADJ_1
2 NEG_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 J 4/26/12 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
1 POS_ADJ_1
2 NEG_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 J 4/26/12
PLAINVIEW, NEW YORK
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Fax: 516-694-6715
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Tel: 321-951-4164
Fax: 321-951-4254
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www.aeroflex.com info-ams@aeroflex.com
Aeroflex Microelectronic Solutions reserves the 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 liability is assumed as a result of use of
this product. No patent licenses are implied.
EXPORT CONTROL: EXPORT 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, performance-driven and customer-focused
For detailed performance characteristic curves, applications information and typical applications see the latest
datasheets for their RH1086 & RH1185, which are available on-line at www.linear.com.
LT, LTC,
, Linear Technology and the Linear logo are registered trademarks and RH1086 & RH1185 are copyright Linear Technology Corporation.
ORDERING INFORMATION
MODEL DLA SMD # SCREENING PACKAGE
VRG8651-7 - Commercial Flow, +25°C testing only
8 Lead
Thru-Hole
Power Pkg
VRG8651-S -
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8651-201-1S 5962-0920101KUC
In accordance with DLA SMD
VRG8651-201-2S 5962-0920101KUA
VRG8651-901-1S 5962R0920101KUC In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100krads(Si)
VRG8651-901-2S 5962R0920101KUA
VRG8652-7 - Commercial Flow, +25°C testing only
8 Lead
Surface Mount
Power Pkg
VRG8652-S -
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8652-201-1S 5962-0920101KZC
In accordance with DLA SMD
VRG8652-201-2S 5962-0920101KZA
VRG8652-901-1S 5962R0920101KZC In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100krads(Si)
VRG8652-901-2S 5962R0920101KZA
