VRG8692-901-1S [AEROFLEX]
Adjustable 7.5A Positive LDO Regulator Radiation Tolerant;
| 型号： | VRG8692-901-1S |
| 厂家： | 
AEROFLEX CIRCUIT TECHNOLOGY |
| 描述： | Adjustable 7.5A Positive LDO Regulator Radiation Tolerant |
| 文件： | 总10页 (文件大小：393K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Standard Products
VRG8691/92
Adjustable 7.5A Positive LDO Regulator
Radiation Tolerant
www.aeroflex.com/voltreg
November 12, 2013
FEATURES
Radiation performance
Enable Input - TTL / CMOS Compatible
- Total dose: 100 krads(Si),
Slow Start capability
Stable with multiple ceramic output capacitors
Packaging – Hermetic metal
- Thru-hole or Surface mount
- 12 Leads, 0.900"L x 1.000"W x .205"Ht
- Power package
Dose rate = 50 - 300 rads(Si)/s
Output voltage adjustable: 1.0V to 3.3V
Output current: 7.5A
Dropout voltage: 0.5V at 7.5Amps
Voltage reference: 1.0V ±0.5%
Load regulation: 0.5% max
Line regulation: 0.2% max
Ripple rejection: >80dB
- Weight - 18 gm max
Designed for aerospace and high reliability space
applications
Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
DESCRIPTION
The Aeroflex Plainview VRG8691/92 is capable of supplying in excess of 7.5Amps over the output voltage range as
defined under recommended operating conditions. The regulator is exceptionally easy to set-up, requiring only 2
external resistors to set the output voltage. The module design has been optimized for excellent regulation and low
drop-out voltage. Figures 2 through 5 illustrate setting output voltage, setting current limits and choosing a slow start
capacitor. The VRG8691/92 serves a wide variety of applications including local on-card regulation, programmable
output voltage regulation or precision current regulation.
The VRG8691/92 has been specifically designed to meet exposure to radiation environments. The VRG8691 is
configured for a Thru-Hole 12 lead metal power package and the VRG8692 is configured for a Surface Mount 12 lead
metal power package. It is guaranteed operational from -55°C to +125°C. Available screened to MIL-STD-883, the
VRG8691/92 is ideal for demanding military and space applications.
CURRENT LIMIT (ICL)
The VRG8691/92 features internal current limiting making them virtually blowout-proof against overloads. The limit
is nominally 11.5A @ Vin = 5V (see Table 2), but may be increased or decreased with the addition of one external
resistor (see Application Note 2).
1
2
3
12
11
10
VIN
VOUT
VRG8691/92
VBIAS
4
9
VSENSE
5
6
Current Limit
Slow Start
8
7
ENABLE
GND
FIGURE 1 – BLOCK DIAGRAM / SCHEMATIC
SCD8691 Rev H
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RANGE
-55 to +150
300
UNITS
°C
Operating (Junction) Temperature Range
Lead Temperature (soldering, 10 sec)
Storage Temperature Range
VBIAS, VIN
°C
-65 to +150
7
°C
V
Thermal Resistance (Junction to case JC)
Power
1
°C/W
W
25 1/
1/ Based on pass transistor limitations of (VIN - VO) x IO and JC < 1°C/W with 25°C max TJ rise and TC = +125°C.
NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings
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
Output Voltage Range
1.0 to 3.3
VDC
°C
Case Operating Temperature Range
-55 to +125
Output Current
VBIAS
0 to 7.5
A
3.3 to 5.5 1/
1.8 to 5.5 2/
VDC
VDC
VIN
1/ VBIAS must maintain a level equal or above VIN but not fall below 3.3V
2/ Depending upon VOUT setting.
ELECTRICAL PERFORMANCE CHARACTERISTICS 1/
PARAMETER
SYM
CONDITIONS
MIN
MAX UNITS
Reference Voltage
VREF
VIN = VBIAS = 5V, ENABLE = 0, 0A < IOUT < 7.5A
2V < VIN < 3V, VOUT = 1.0V, CIN > 47µF,
0.985 1.015
V
VOUT
VIN
Line Regulation
Load Regulation
-
-
0.2
0.5
%/V
4.3V < VIN < 5.3V, VOUT = 3.3V, COUT > 47µF,
0A < IOUT < 7.5A, CIN > 47µF, COUT > 47µF,
VOUT
IOUT
%
f = 120Hz, CLOAD = 47µF,
Ripple Rejection Ratio
VIN + VRIP > VOUT + VDROP(MAX) @ 5A,
VIN = 4.3V, VRIP = 1VP-P, VOUT = 3.3V
80
-
dB
Dropout Voltage
VDROP
IADJ
IMIN
@VOUT = 1%, 0A < IOUT < 7.5A
-
-
0.5
3
V
µA
mA
A
Adjustment Pin Current
Minimum Load Current
Current Limit 2/
-
0
ICL
9.5
13.5
VOUT
TIME
Long Term Stability 3/
-
-
1
%
Supply Current (VBIAS)
Notes:
IBIAS
15
mA
1/ Unless otherwise specified, these specifications apply for post radiation: VBIAS = VIN = 5V, VOUT = 3.3V, IOUT = 7.5A and -55°C < Tc <+125°C, Min
Input/Output capacity of 47µF Tant with 1µF ceramic in parallel.
2/ Current Limit is adjustable as shown in Application Note 2, Figures 3 and 4.
3/ Not tested. Shall be guaranteed to the specified limits after 1000hr life test.
SCD8691 Rev H 11/12/13
Aeroflex Plainview
2
APPLICATION NOTE 1
BASIC SET-UP
Setting the output voltage (VOUT):
4
VBIAS
0.1µF
VBIAS
VRG8691/92
1
2
10
11
VIN
VOUT
VIN
VOUT
1µF
+ 47µF
TANT
3
12
CER
1µF
+
8
5
7
CLOAD
47µF
CURR. LIMIT
CURR. LIMIT
ENABLE
S
LOW
S
TART
CER
R1
R2
0.1µF
TANT
ENABLE 1/
GND
VSENSE
6
9
IADJ
VREF (=1V)
To set the output voltage for a particular Vout:
- Choose an R2 value. (Recommended value = 1k
- Then use the following formula to determine the value of R1.
VOUT - VREF
(R2 x IADJ) + VREF
, where VREF = 1v, IADJ typ = 10pA
R1 = R2 x
Table 1 shows example values for R1 and R2 to achieve some standard voltages.
Table 2 shows the nominal current limit settings if the ’CURR. LIMIT’ function (pin 8) is left open.
Table 2
2/
Table 1
Example R1 & R2 for typical VOUT
VIN
5V
ICL NOM
VOUT
3.3V
2.5V
1.8V
1.0V
R2
R1
11.5A
7.5A
5.7A
4.1A
1k
1k
1k
1k
2.3k
1.5k
800
0
3.3V
2.5V
1.8V
Notes:
1/ ENABLE should be asserted after both VIN and VBIAS are applied.
(See Application Note 3, Figure 5 for the configuration where a separate ENABLE control line is NOT required).
2/ ICL varies directly with VIN.
(See Application Note 2 for adjusting the Current Limit, ICL).
FIGURE 2 –SETTING OUTPUT VOLTAGE
SCD8691 Rev H 11/12/13
3
Aeroflex Plainview
APPLICATION NOTE 2
SETTING THE CURRENT LIMIT
To Increase the Current Limit (ICL):
4
VBIAS
VBIAS
0.1µF
VRG8691/92
1
10
VIN
VOUT
2
11
12
V
IN
VOUT
47µF
1µF
+
3
5
CER
TANT
1µF
+
7
CLOAD
47µF
TANT
ENABLE
ENABLE
S
LOW
START
CER
R1
R2
0.1µF
8
CURR. LIMIT
GND
VSENSE
6
9
RINC
IADJ
VREF (=1V)
- If the ’CURR. LIMIT’ function (pin 8) is left open, the ICL decreases from 11.5 A(NOM) as VIN is decreased from 5V (Table 3).
Table 3
VIN
5V
RINC
Open
Open
Open
Open
ICL NOM
11.5 A
7.5 A
3.3V
2.5V
1.8V
5.7 A
4.1 A
- To increase the current limit above the nominal setting for any VIN and ICL combination, use the following formula:
30 x VIN
RINC(K-OHMS) =
30 x ICL
( )
69
- VIN
- To maintain ICL at the 11.5 A setting, for commonly found VIN voltages, apply RINC value found in Table 4.
Table 4
VIN
5V
RINC
Open
56k
30k
16k
ICL NOM
11.5 A
11.5 A
11.5 A
11.5 A
3.3V
2.5V
1.8V
FIGURE 3 – INCREASING THE CURRENT LIMIT (ICL)
SCD8691 Rev H 11/12/13
Aeroflex Plainview
4
APPLICATION NOTE 2 (CONTINUED)
SETTING THE CURRENT LIMIT
To Decrease the Current Limit (ICL):
4
VBIAS
VBIAS
0.1µF
VRG8691/92
1
10
VIN
VOUT
2
11
VIN
VOUT
1µF
47µF
+
3
12
RDEC
CER
TANT
1µF
+
8
5
7
CLOAD
47µF
TANT
CURR. LIMIT
ENABLE
CURR. LIMIT
ENABLE
S
LOW
S
TART
CER
R1
R2
0.1µF
GND
VSENSE
6
9
IADJ
VREF (=1V)
- As shown in Table 3, if the ’CURR. LIMIT’ function (pin 8) is left open, the ICL decreases from 11.5 A(NOM) as VIN is
decreased from 5V.
- To achieve any ICL, less than nominal, use RDEC which can be calculated using the following formula:
31 x VIN
RDEC(K-OHMS) =
69 x VIN
- ICL
( )
30
FIGURE 4 – DECREASING THE CURRENT LIMIT (ICL)
SCD8691 Rev H 11/12/13
Aeroflex Plainview
5
APPLICATION NOTE 3
START UP SEQUENCE
Recommended Power Supply Sequencing Options:
- OPTION 1: Controlling the ENABLE line with a Digital signal (TTL / CMOS compatible).
- Prior to applying power, disable the regulator by setting the ENABLE control line to a HIGH state.
- Apply VIN and VBIAS. 1/
- Wait until both VIN and VBIAS supplies have reached their operating levels.
- Toggle the ENABLE control line to a LOW state to turn on VOUT of the regulator.
- OPTION 2: Controlling the ENABLE line using the CDELAY feature.
- Connect a CDELAY capacitor between VBIAS and the ENABLE as shown in Figure 5 below. 2/
- Apply VIN and VBIAS. 1/
- CDELAY causes the regulator to self-enable after VBIAS has reached operating level.
NOTE: The ENABLE should always be asserted AFTER VIN and VBIAS have reached operating level.
4
VBIAS
VBIAS
0.1µF
VRG8691/92
1
10
VIN
VOUT
2
2/
11
12
VIN
VOUT
1µF
+
47µF
3
+
CDELAY
CER
TANT
1µF
+
1/
8
5
7
CLOAD
47µF
TANT
CURR. LIMIT
ENABLE
SLOW
START
CER
R1
R2
0.1µF
GND
VSENSE
6
9
IADJ
VREF (=1V)
NOTES:
1/ VIN should be applied before VBIAS if the Slow Start feature is used.
2/ CDELAY capacitor of 10uF is adequate for VBIAS rise times of up to 50ms.
FIGURE 5 – DELAYED ENABLE
SCD8691 Rev H 11/12/13
Aeroflex Plainview
6
APPLICATION NOTE 4
VOUT START UP RISE TIME CONTROL
Utilizing the Slow Start option:
When the VRG8691/92 is first powered up, using the Slow Start function controls the rate at which VOUT rises to the
required voltage set by R1 and R2.
Note: VIN should be applied before VBIAS when the Slow Start feature is used.
4
VBIAS
VBIAS
0.1µF
VRG8691/92
1
10
VIN
VOUT
2
11
VIN
VOUT
1µF
47µF
+
3
12
CER
TANT
1µF
+
8
5
7
CLOAD
47µF
CURR. LIMIT
ENABLE
S
LOW
S
TART
CER
0.1µF
R1
R2
TANT
ENABLE
+
0
CSS
GND
VSENSE
6
9
IADJ
VREF (=1V)
If it is desirable to control the output rise time, a capacitor (CSS) can be asserted on the Slow Start pin to adjust the rise
time for the following:
A. Large load capacitance will cause high surge currents which will trip the current limit circuitry.
The use of CSS will allow the output voltage to rise slowly thus mitigate the surge current phenomenon.
VOUT NOM
ICL - ILOAD NOM
CSS
CLOAD
>
X
(0.4 X 0.0014)
B. CSS may be used solely to control VOUT RISE TIME (Tr), when CLOAD is not an issue.
CSS X 2.5
Note: CSS in Farads and TR in seconds.
TR =
( )
0.0014
C. CSS is effective only when VIN is applied prior to VBIAS or ENABLE.
FIGURE 6 – SLOW START
SCD8691 Rev H 11/12/13
7
Aeroflex Plainview
PIN NUMBERS vs FUNCTION
PIN
FUNCTION
PIN
FUNCTION
1
2
3
4
5
6
VIN
7
8
Slow Start
Current Limit
VSENSE
VOUT
VIN
VIN
9
VBIAS
ENABLE
GROUND
10
11
12
VOUT
VOUT
Notes:
1. Dimension Tolerance: ±.005 inches
2. Package contains BeO substrate
3. Case electrically isolated
FIGURE 3 – PACKAGE OUTLINE — VRG8691 THRU-HOLE POWER PACKAGE
SCD8691 Rev H 11/12/13
Aeroflex Plainview
8
PIN NUMBERS vs FUNCTION
PIN
FUNCTION
PIN
FUNCTION
1
2
3
4
5
6
VIN
7
8
Slow Start
Current Limit
VSENSE
VOUT
VIN
VIN
9
VBIAS
ENABLE
GROUND
10
11
12
VOUT
VOUT
Notes:
1. Dimension Tolerance: ±.005 inches
2. Package contains BeO substrate
3. Case electrically isolated
FIGURE 4 – PACKAGE OUTLINE — VRG8692 SURFACE MOUNT POWER PACKAGE
SCD8691 Rev H 11/12/13
Aeroflex Plainview
9
ORDERING INFORMATION
MODEL
DLA SMD #
SCREENING
PACKAGE
VRG8691-7
-
Commercial Flow, +25°C testing only
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8691-S
-
12 Lead
Thru-Hole
Power Pkg
VRG8691-201-1S
VRG8691-201-2S
VRG8691-901-1S
VRG8691-901-2S
VRG8692-7
5962-0923701KXC
5962-0923701KXA
5962R0923701KXC
5962R0923701KXA
-
In accordance with DLA SMD
In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100krads(Si)
Commercial Flow, +25°C testing only
Military Temperature, -55°C to +125°C
Screened in accordance with the individual Test Methods
of MIL-STD-883 for Space Applications
VRG8692-S
-
12 Lead
Surface Mount
Power Pkg
VRG8692-201-1S
VRG8692-201-2S
VRG8692-901-1S
VRG8692-901-2S
5962-0923701KYC
5962-0923701KYA
5962R0923701KYC
5962R0923701KYA
In accordance with DLA SMD
In accordance with DLA Certified RHA Program Plan to RHA
Level "R", 100krads(Si)
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.)
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INTERNATIONAL
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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.
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attributes represented by these three icons:
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SCD8691 Rev H 11/12/13
10
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