VRG8684 (3/16)

Voltage Regulator
VRG8684
3A LDO Adjustable Positive Voltage Regulator
Released Datasheet
Cobham.com/HiRel
March 24, 2016
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FEATURES
 Manufactured using
Space Qualified RH1084 die
 Radiation performance
- Total dose: 100 krad(Si), Dose rate = 50-300 rad(Si)/s
 Thermal shutdown
 Output voltage adjustable: 1.25V to 23V
 Dropout voltage: 1.80V at 3.0 Amps
 3-Terminal
 Output current: 3.0Amps
 Voltage reference: 1.25V +2%, -3.2%
 Load regulation: 0.35% max
 Line regulation: 0.25% max
 Ripple rejection: >60dB
 Packaging – Hermetic Ceramic
- SMD-0.5 Surface mount
- 3 Pads, .400"L x .296"W x .120"Ht
- Power package
- Weight - 2 gm max
 Designed for aerospace and high reliability space applications
 Radiation Hardness Assurance Plan: DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The VRG8684 consists of a Positive Adjustable (RH1084) LDO voltage regulator capable of supplying 3.0
Amps over the output voltage range as defined under recommended operating conditions. The VRG8684 offers
excellent line and load regulation specifications and ripple rejection.
The VRG8684 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 VRG8684 has been specifically designed to meet exposure to radiation environments and is configured for a
SMD-0.5 SMT power package. It is guaranteed operational from -55°C to +125°C. Available screened in accordance
with MIL-PRF-38534, the VRG8684 is ideal for demanding military and space applications.
Dropout (VIN - VOUT) decreases at lower load currents.
3
ADJ
VOUT
1
RH1084
Positive
Regulator
VIN
2
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8684
Rev D
1
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ABSOLUTE MAXIMUM RATINGS
Rating
Units
Lead temperature (soldering 10 Sec)
Parameter
300
°C
Input Output Differential
25
VDC
Load Current, maximum
6.0
A
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
2
°C/W
Thermal Resistance (Junction to Case) JC
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
Output Voltage Range
Input Output Differential
Case Operating Temperature Range
Range
Units
1.25 to 23
VDC
1.8 to 24
-55 to +125
VDC
°C
ELECTRICAL PERFORMANCE CHARACTERISTICS 1/
UNLESS OTHERWISE SPECIFIED: -55°CTC+125°C
Parameter
Reference Voltage 3/, 2/
Conditions (PPMAX)
Symbol
VREF
Min
1.5V < (VIN - VOUT) < 15V, 10mA < IOUT < 3.0A
Dropout Voltage 2/
VDROP1 VREF = 1%, IOUT = 5.0A
Dropout Voltage 2/
VDROP2 VREF = 1%, IOUT = 3.0A
Max
1.210 1.275
-
Units
V
1.8
V
1.4
V
Line Regulation 3/, 2/
VOUT ILOAD = 10mA, 1.5V < (VIN - VOUT) < 15V
VIN
-
0.5
%
Load Regulation 3/, 2/
VOUT 10mA < IOUT < 3.0A, (VIN - VOUT) = 3V
IOUT
-
0.35
%
-
120
µA
10 mA < IOUT < 3.0A, 1.5V < (VIN - VOUT) < 15V
-
5
µA
10
mA
Adjust Pin Current 2/
Adjust Pin Current
Change 2/
Minimum Load Current
4/, 2/
IMIN
(VIN - VOUT) = 25V
-
Current Limit 2/
ICL
(VIN - VOUT) = 5V
5.25
Ripple Rejection 3/
IOUT = 3.0A, (VIN - VOUT) = 3V, f = 120Hz,
CADJ = COUT = 25µF
Thermal Regulation
VREF Long-Term Stability
4/
A
60
-
dB
30ms pulse, TC = +25°C
-
0.04
%/W
Burn In: TC = +125°C @ 1000hrs minimum, Tested at +25°C.
-
1.0
%
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 100 krad(Si) at +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/ Not tested. Shall be guaranteed by design, characterization, or correlation to other tested parameters.
SCD8684
Rev D 3/24/2016
2
Cobham Semiconductor Solutions
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(Watts)
Maximum Power Dissipation
VRG8684
Case Temperature (Degrees C)
FIGURE 2 – MAXIMUM POWER vs CASE TEMPERATURE
The maximum Power dissipation is limited by the thermal shutdown function of the regulator chip in the VRG8684.
The graph above represents the achievable power before the chip shuts down. The line in the graph represents the
maximum power dissipation of the VRG8684 This graph is based on the maximum junction temperature of 150°C
and a thermal resistance (JC) of 2°C/W.
RH1084
See Note 1/ on page 2
FIGURE 3 – RH1084 DROPOUT VOLTAGE CURVE
SCD8684
Rev D 3/24/2016
3
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RH1084
See Note 1/ on page 2
FIGURE 4 – RH1084 SHORT CIRCUIT CURRENT
VIN
10µF
Tant.
2
VRG8684
1
VREF
VOUT
R1
22µF
Tant.
3 ADJ
VREF = 1.25V, IADJ = 55µA
+Reg = VOUT = VREF (1+R2/R1) + (IADJ x R2)
R2
FIGURE 5 – BASIC RH1084 ADJUSTABLE REGULATOR APPLICATION
SCD8684
Rev D 3/24/2016
4
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3
2
1
NOTE: Package & Lid are electrically isolated from signal pads.
FIGURE 6 – VRG8684 PACKAGE OUTLINE — SURFACE MOUNT
SCD8684
Rev D 3/24/2016
5
Cobham Semiconductor Solutions
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ORDERING INFORMATION
Model
DLA SMD #
Screening
VRG8684 - 7
-
Commercial Flow, +25°C testing only
VRG8684 - S
-
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8684- 201-1S
5962-0924501KXC
VRG8684- 201-2S
5962-0924501KXA
VRG8684- 901-1S
5962R0924501KXC
VRG8684- 901-2S
5962R0924501KXA
SCD8684
Rev D 3/24/2016
Package
SMD-0.5
Power Pkg
In accordance with DLA SMD
In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100 krad(Si)
6
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REVISION HISTORY
Date
Revision
03/24/2016
D
SCD8684
Rev D 3/24/2016
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 RH1084, which is available on-line at www.linear.com.
LT, LTC, Linear Technology and the Linear logo are registered trademarks and RH1084 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.
Cobham Semiconductor Solutions
35 S. Service Road
Plainview, NY 11803
E: [email protected]
T: 800 645 8862
Aeroflex Plainview Inc., DBA Cobham Semiconductor Solutions, reserves the right to make changes to any products and services described herein
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
herein, except as expressly agreed to in writing by Aeroflex; nor does the purchase, lease, or use of a product or service from Aeroflex convey a
license under any patent rights, copyrights, trademark rights, or any other of the intellectual rights of Aeroflex or of third parties.
SCD8684
Rev D 3/24/2016
8
Cobham Semiconductor Solutions
www.cobham.com/HiRel