VRG8669

Voltage Regulator
VRG8669
2.5A ULDO Adjustable Positive Voltage Regulator
Released Datasheet
Cobham.com/HiRel
March 31, 2016
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FEATURES
 Manufactured using
 Radiation performance








Space Qualified RH3083 die
- Total dose: 100 krad(Si), Dose rate = 50 - 300 rad(Si)/s
- ELDRS:
50 krad(Si), Dose rate <
0.01 rad(Si)/s
Current Limit with Foldback and Over-temperature protection
Input voltage range: 1.2V to 23V
Output voltage adjustable: 0V to 21V
Outputs may be paralleled for higher current
Post Radiated Dropout voltage, VCONTROL > 2 Volts:
- 0.75V @ 2.5Amps
- 0.28V @ 1.0Amps
Output current: 2.5Amps
Packaging – Hermetic Ceramic
- Hermetic Surface Mount Power
- 5 Pads, .545"L x .296"W x .120"Ht
- Weight - 2.0 gm max
Designed for aerospace and high reliability space applications
 Radiation Hardness Assurance Plan: DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The VRG8669 consists of a Positive Adjustable (RH3083) ULDO voltage regulator capable of supplying
2.5Amps over the output voltage range as defined under recommended operating conditions. The
VRG8669 offers excellent line and load regulation specifications and ripple rejection.
The VRG8669 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 VRG8669 has been specifically designed to meet exposure to radiation environments and is configured
for an SMD power package. It is guaranteed operational with a case operating temperature from -55°C to
+125°C. Available screened to MIL-STD-883, the VRG8669 is ideal for demanding military and space
applications.
Dropout (VIN - VOUT) decreases at lower load currents.
3
SET
VCONTROL
RH3083
Positive Regulator
5
OUT
2
SENSE
4
IN
1
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8669
Rev G
1
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ABSOLUTE MAXIMUM RATINGS
Parameter (Voltages are Relative to VOUT)
Rating
Units
Input Voltage (No Overload or Short Circuit)
+23
VDC
VCONTROL
+28
VDC
Indefinite
-
300
°C
Output Short Circuit Duration
Lead temperature (soldering 10 Sec)
Input Output Differential
18
VDC
2,000 - 3,999
V
Operating Junction Temperature Range
-55 to +150
°C
Storage Temperature Range
-65 to +150
°C
2.5
°C/W
ESD 1/
Thermal Resistance (Junction to Case) JC
1/ Meets ESD testing per MIL-STD-883, method 3015, Class 2.
NOTICE: Stresses above those listed under “Absolute Maximum Ratings” 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
0 to 22
VDC
0.5 to 18
VDC
-55 to +125
°C
1 to 23
V
1.6 to 28
V
Output Voltage Range
Input Output Differential
Case Operating Temperature Range
Input Voltage (Voltages are Relative to VOUT)
VCONTROL (Voltages are Relative to VOUT)
ELECTRICAL PERFORMANCE CHARACTERISTICS
Unless otherwise specified: -55°C < Tc < +125°C.
Parameter
Conditions (P < PMAX)
Symbol
Min
Max
Units
49.0
51.5
µA
49
51
µA
Set Pin Current
IREF1
5.0mA < ILOAD < 2.5A, VIN > 2V, VCONTROL > 3V
Set Pin Current 1/
IREF2
VIN = 2V, VCONTROL = 3V, ILOAD = 1mA, TC = 25°C
Output Offset Voltage
(VOUT - VSET) 1/
VOS
VIN = 2V, VCONTROL = 3V, ILOAD = 1mA,
-6.0
6.0
mV
Line Regulation 1/
VOS
1V < VIN < 23V, 2V < VCONTROL < 25V,
ILOAD = 1mA, TC = +25C
-0.07
0.07
mV/V
Load Regulation 1/
VOS
(VIN - VOUT) = 3V, ILOAD = 5mA to 2.5A, TC = 25°C
-10.0
10.0
mV
-
1.65
-
1.6
-
0.75
-
0.28
ILOAD = 2.5A
VCONTROL Dropout Voltage
VCDROP
VIN Dropout Voltage
VINDROP
Current Limit 1/ 3/
IMAX
VIN = VCONTROL = +5V, VSET = 0V, VOUT = 0.4V
Minimum Load Current 1/ 4/
IMIN
VCONTROL = 25V, VIN = 23V
Ripple Rejection
-
ILOAD = 1.0A
1/
ILOAD = 2.5A
ILOAD = 1.0A
1/
ILOAD = 0.2A, (VIN - VOUT) = 3V, f = 120Hz,
COUT = 2.2µF, CSET = 0.1µF
V
V
2.8
-
A
-
1.0
mA
60
-
dB
Notes:
1/ Specification derated to reflect Total Dose exposure to 100 krad(Si) @+25°C.
2/ Dropout results from either minimum control voltage, VCONTROL, or minimum input voltage, VIN, both specified with respect to VOUT. These
specifications represent the minimum input-to-output differential voltage required to maintain regulation.
3/ Pulsed @ <10% duty cycle @ +25°C for characterization only.
4/ Not tested. Shall be guaranteed to the specified limits.
SCD8669
Rev G 3/31/2016
2
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FIGURE 2 – MAXIMUM POWER vs CASE TEMPERATURE
The maximum Power dissipation is limited by the thermal shutdown function of the regulator chip in the VRG8669.
The graph above represents the achievable power before the chip shuts down. The line in the graph represents the
maximum power dissipation of the VRG8669. This graph is based on the maximum junction temperature of 150°C
and a thermal resistance (JC) of 2.5°C/W.
FIGURE 3 – RH3083 TYPICAL CURRENT LIMIT
SCD8669
Rev G 3/31/2016
3
FIGURE 4 – RH3083 TYPICAL DROPOUT
VOLTAGE CURVE (VCONTROL ≥ 1.6V)
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FIGURE 5 – RH3083 TYPICAL VCONTROL DROPOUT
FIGURE 6 – BASIC VRG8669 ADJUSTABLE REGULATOR APPLICATION
SCD8669
Rev G 3/31/2016
4
Cobham Semiconductor Solutions
www.cobham.com/HiRel
.301
MAX
Pin 1
Epoxy Dot
(on side)
.095
4 Places
R.025 MAX
6 Places
.030 MIN
4
1
.005
.120
4 Places
.030
MIN
.550
MAX
5
.200
.005
.030
MIN
3
2
.150
4X R.020
.005
.015
3 Places
.127
MAX
.005
.286
NOTES:
1. Package & Lid are electrically isolated from signal pads
FIGURE 7 – PACKAGE OUTLINE — SURFACE MOUNT
SCD8669
Rev G 3/31/2016
5
Cobham Semiconductor Solutions
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ORDERING INFORMATION
Model
DLA SMD #
Screening
VRG8669- 7
-
Commercial Flow, +25°C testing only
VRG8669 - S
-
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8669 - 901-1S
5962R1420101KYC
VRG8669 - 901-2S
5962R1420101KYA
SCD8669
Rev G 3/31/2016
Package
SMD
Power Pkg
In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100 krad(Si)
6
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REVISION HISTORY
Date
Revision
03/31/2016
G
SCD8669
Rev G 3/31/2016
Change Description
Import into Cobham format
7
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Datasheet Definition
Advanced Datasheet - Product In Development
Preliminary Datasheet - Shipping Prototype
Datasheet - Shipping QML & Reduced Hi-Rel
For detailed performance characteristic curves, applications information and typical applications, see the latest
datasheet for their RH3083, which is available on-line at www.linear.com.
LT, LTC, Linear Technology and the Linear logo are registered trademarks and RH3083 is copyright Linear Technology Corporation.
EXPORT CONTROL:
This product is controlled for export under the Export Administration Regulations (EAR), 15 CFR Parts 730-774.
A license from the Department of Commerce may be required prior to the export of this product from the United States.
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Plainview, NY 11803
E: [email protected]
T: 800 645 8862
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at any time without notice. Consult Aeroflex or an authorized sales representative to verify that the information in this data sheet is current before
using this product. Aeroflex does not assume any responsibility or liability arising out of the application or use of any product or service described
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SCD8669
Rev G 3/31/2016
8
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