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30 kRad - 100kRad Rad Tolerant LDO
Positive Adjustable Voltage Regulators in
Hermetic Packages
0 02 R0
30 kRad - 100kRad RADIATION TOLERANT 7.5A,
5A, 3A, 1.5A LOW DROPOUT POSITIVE
ADJUSTABLE REGULATORS
FEATURES
Operates Down to 1V Dropout, 1.5V @ Max. Current
.015% Line Regulation
.01% Load Regulation
1% Reference Voltage
Hermetic Isolated and Non-Isolated Packages
Radiation Tolerant up to 150 kRad (Si)
Available Hi-Rel Screened, Class B and Class S, MIL-STD-883
DESCRIPTION
These three terminal positive adjustable voltage regulators are designed to provide 7.5A,
5A, 3A, and 1.5A with higher efficiency than conventional voltage regulators. The devices
are designed to operate to 1 Volt input to output differential and the dropout voltage is
specified as a function of load current. All devices are pin compatible with older three
terminal regulators. These devices are ideally suited for Space applications where small
size, high reliability, and radiation tolerance is required. The high level of Radiation
Tolerance of these devices makes them a desirable choice for LEO and many MEO and
GEO communication satellites. Radiation testing is performed on a single wafer by wafer
basis. Random die samples per wafer are selected, packaged and radiation tested to
qualify each individual semiconductor wafer-by-wafer.
ABSOLUTE MAXIMUM RATINGS
@ 25
C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . - 55C to + 150C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C
Output Current - OMR183SC, NM.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 A
OMR184SC, NM.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 A
OMR185ST, SR, NM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 A
OMR186ST, SR, NM.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
OMR186NH.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 A
Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 C
Surface Mount Package Soldering Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 C
Radiation Tolerant - Total Dose, OMR183, OMR184 . . . . . . . . . . . . . . . . . . .100k Rad (Si)
Total Dose, OMR185 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50k Rad (Si)
Total Dose, OMR186 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30k Rad (Si)
Note:
OMR183 and OMR184 products are packaged in the TO-258 or SMD-1 Packages (7.5A & 5A).
OMR185 products are packaged in the TO-257, D2 Pac or SMD-1 Packages (3A).
OMR186 products are packaged in the TO-257, D2 Pac or SMD-1 or TO-205 Packages (1.5A & 0.5A).
OMR185 Series
OMR186 Series
OMR183 Series
OMR184 Series
Please see mechanical
outlines herein
OMR183- OMR186 Series
ELECTRICAL CHARACTERISTICS
(T
C
= 25C unless otherwise noted)
Parameter
Conditions
Min.
Typ.
Max.
Units
Reference Voltage
I
OUT
= 10 mA, T
j
= 25C
(V
IN
- V
OUT
) = 3 V
1.238
1.250
1.262
V
10mA
I
OUT
I
FULL LOAD
1.5 V
(V
IN
- V
OUT
)
25 V (Note 3)
1.220
1.250
1.270
V
Line Regulation
I
LOAD
= 10 mA, 1.5 V
(V
IN
- V
OUT
)
15 V,
0.015
0.2
%
T
j
= 25C
0.035
0.2
%
15 V
(V
IN
- V
OUT
)
35 V (Notes 1 & 2)
0.05
0.5
%
Load Regulation
(V
IN
- V
OUT
) = 3 V
10 mA
I
OUT
I
FULL LOAD
T
j
= 25C
0.5
0.8
%
(Notes 1, 2, 3)
.8
1.0
%
Dropout Voltage
V
REF
= 1%, I
OUT
= I
FULL LOAD
1.3
1.5
V
Current Limit
OMR183
(V
IN
- V
OUT
) = 5 V
8.0
A
(V
IN
- V
OUT
) = 25 V
0.4
A
OMR184
(V
IN
- V
OUT
) = 5 V
5.5
A
(V
IN
- V
OUT
) = 25 V
0.3
A
OMR185
(V
IN
- V
OUT
) = 5 V
3.2
A
(V
IN
- V
OUT
) = 25 V
0.2
A
OMR186
(V
IN
- V
OUT
) = 5 V
1.5
A
(V
IN
- V
OUT
) = 25 V
0.75
A
Minimum Load Current
(V
IN
- V
OUT
) = 25 V
5
10
mA
Thermal Regulation
T
A
= 25C, 30 ms pulse
OMR183
Guaranteed by design
0.002
0.01
%/W
OMR184
0.003
0.15
%/W
OMR185
0.004
0.02
%/W
OMR186
0.010
0.05
%/W
Ripple Rejection
f = 120 Hz
C
ADJ
= 25 F Tantalum
I
OUT
- I
FULL LOAD
(V
IN
- V
OUT
) = 3 V
60
75
dB
Adjust Pin Current
T
J
= 25C
55
A
Adjust Pin Current Change
10mA
I
OUT
I
FULL LOAD
1.5 V
(V
IN
- V
OUT
)
25 V
0.2
5
A
Temperature Stability
-55C
T
J
+150C
0.5
%
Long Term Stability
T
A
= 125C, 1000 Hrs.
0.3
1
%
Thermal Resistance
Junction-to-Case
TO-257, D
2
Pac
4.2
C/W
TO-258
2.75
C/W
SMD-1
3.5
C/W
TO-205
17
C/W
Note 1: Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation (OMR183/60W, OMR184/45W, OMR185/30W,
OMR186/15W). Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum
power dissipation will not be available over the full input/output voltage range.
Note 3: I
FULL LOAD
curve is defined as the minimum value of current limit as a function of input to output voltage. Note that power
dissipation is only achievable over a limited range of input to output voltage.
Note 4: Dropout voltage is specified over the full output current range of the device.
Note 5: Refer to curves for typical characteristics versus total dose radiation levels.
Radiation Testing is performed on a single wafer by wafer basis.
Each wafer is identified and a random sample of 5 die per wafer is selected.
The die are then individually assembled in a hermetic package, data logged, electrically
tested, hi-rel screened and then submitted to radiation testing.
The packaged die are submitted to Steady State Total Dose radiation per Method 1019,
Condition A, at a dose rate of 50 RAD/sec biased at maximum supply voltage.
Final electrical test is performed within two hours of both Total Dose Radiation level from
a Cobalt 60 source and 168 hr, 100C annealing process. Read and record data
including two non-radiated control samples.
The wafer is then qualified only if samples from wafers meet full electrical specifications
after 150% of total dose rating as specified in each product data sheet.
Omnirel's controlling specifications are as follows: For Voltage Regulators the
controlling specification is MIL-PRF- 38534/MIL-STD-883. For Rectifiers/Schottky the
controlling specification is MIL-PRF-19500/MIL-STD-750.
OMR183- OMR186 Series
OMNIREL'S RADIATION TEST PROCEDURE
Standard Class Level Screening
Per MIL-PRF-38535
Screen
*Level B
*Level S
Test Method
Required
Test Method
Required
Wafer Lot Acceptance
-----
-----
5007
100%
Non-destructive Bond Pull
-----
-----
-----
-----
Pre-Cap Visual Inspection
2010
100%
2010
100%
Temperature Cycle
1010
100%
1010
100%
Constant Acceleration
2001
100%
2001
100%
Visual Inspection
-----
100%
-----
100%
PIND Test
-----
-----
2020
100%
Serialization
-----
-----
-----
100%
Pre-Burn-In Electrical
Data Sheet
100%
Data Sheet
100%
Burn-In
1015/160 hrs.
100%
1015/240hrs.
100%
Interim Electrical
-----
-----
Data Sheet
100%
PDA Calculations
5% Functional
Lot
5% Functional
Lot
Final Electrical
Data Sheet
100%
Data Sheet
100%
Fine & Gross Seal
1014
100%
1014
100%
Radiographic
-----
-----
2012/Two Views
100%
Conformance Inspection**
GR A
100%
GR A
100%
Final Visual Inspection
2009
Sample
2009
Sample
*Note: For "B" Level Screening add "M" to part number, for "S" Level Screening add "S" to part
number. See Part Number Designator.
**Note: Additional conformance inspection testing i.e. Group B, C, & D optional.
AVAILABLE PRODUCT SCREENING
OMR183- OMR186 Series
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input/Output Differential (V)
2
1
0
0
1
2
3
4
5
6
7
8
9 10
Output Current (A)
OMR183 Dropout Voltage
T
J
= 25C
Output Voltage Deviation (%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-50 -25
0
25 50 75 100 125 150
Temperature (C)
OMR183 Load Regulation
I = 7.5A
Output Voltage Deviation (%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-50 -25
0
25 50 75 100 125 150
Temperature (C)
OMR184 Load Regulation
I = 5A
Minimum Input/Output Differential (V)
2
1
0
0
1
2
Output Current (A)
OMR186 Dropout Voltage
T
J
= 25C
Output Voltage Deviation (%)
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-50 -25
0
25 50 75 100 125 150
Temperature (C)
OMR185 Load Regulation
I = 3A
Minimum Input/Output Differential (V)
2
1
0
0
1
2
3
4
5
6
Output Current (A)
OMR184 Dropout Voltage
T
J
= 25C
Minimum Input/Output Differential (V)
2
1
0
0
1
2
3
4
Output Current (A)
OMR185 Dropout Voltage
T
J
= 25C
Short Circuit Current (A)
12
10
8
6
4
2
0
5
0
10
15
20
25
30
35
Input/Output Differential (V)
OMR183 Short Circuit Current
T
J
= 150C
T
J
= -55C
I
FULL LOAD
T
J
= 25C
Short Circuit Current (A)
10
9
8
6
6
5
4
3
2
1
0
5
0
10 15 20 25 30
35
Input/Output Differential (V)
OMR184 Short Circuit Current
T
J
= 25C
T
J
= -55C
I
FULL LOAD
T
J
= 150C
Short Circuit Current (A)
6
5
4
3
2
1
0
5
0
10 15 20 25 30 35
Input/Output Differential (V)
OMR185 Short Circuit Current
T
J
= 25C
T
J
= -55C
I
FULL LOAD
T
J
= 150C
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-50 -25
0
25 50 75 100 125 150
Temperature (C)
OMR186 Load Regulation
I = 3A
Output Voltage Deviation (%)
Short Circuit Current (A)
3.0
2.5
2.0
1.5
1
.5
0
5
0
10 15 20 25 30 35
Input/Output Differential (V)
OMR186 Short Circuit Current
T
J
= 25C
T
J
= -55C
I
FULL LOAD
T
J
= 150C
OMR183- OMR186 Series
Stability
The OMR183-186 Series requires the use of
an output capacitor as part of the device
frequency compensation.
For all operating
conditions, the addition of 150F aluminum
electrolytic or a 22F solid tantalum on the
output will ensure stability.
Normally,
capacitors much smaller than this can be used.
Many different types of capacitors with widely
varying characteristics are available.
These
capacitors differ in capacitor tolerance
(sometimes ranging up to 100%), equivalent
series resistance, and capacitance
temperature coefficient.
The 150F or 22F values given will ensure
stability.
When the adjustment terminal is bypassed to
improve the ripple rejection, the requirement
for an output capacitor increases. The values
of 22F tantalum or 150F aluminum cover all
cases of bypassing the adjustment terminal.
Without bypassing the adjustment terminal,
smaller capacitors can be used with equally
good results and the table below shows
approximately what size capacitors are needed
to ensure stability.
Recommended Capacitor Values
Normally, capacitor values on the order of
100F are used in the output of many
regulators to ensure good transient response
with heavy load current changes.
Output
capacitance can be increased without limit and
larger values of output capacitor further
improve stability and transient response of the
OM183SC regulators.
Output Voltage -- Adjustable Regulators
The OMR183-OM186 devices develop a
1.25V reference voltage between the output
and the adjust terminal (see below).
By
placing a resistor, R1, between these two
terminals, a constant current is caused to flow
through R1 and down through R2 to set the
overall output voltage. Normally this current is
the specified minimum load current of 10mA.
Because IADJ is very small and constant when
compared with the current through R1, it
represents a small error and can usually be
ignored.
Basic Adjustable Regulator
APPLICATION NOTES
Input
Output
Adjustment
10F
10F Tantalum, 50F Aluminum
None
10F
22F Tantalum, 150F Aluminum
20F
RADIATION TEST PROGRAM
The following chart is a summary of the test data collected on Radiation Tolerant OMR183-186
series at various doses. The chart depicts the Total Radiation Dose that each device was
exposed to on a step stress irradiation basis prior to failure. Failure is defined as any electrical
test that does not meet the limits of the device per the published data sheet specifications after
radiation testing.
Omnirel P/N
5K
10K
20K 30K
50K
60K
70K
80K
100K
150K
200K RAD
OMR183
Test Points
X
X
X
OMR184
Test Points
X
X
X
OMR185
Test Points
X
X
X
X
X
X
X
OMR186
Test Points
X
X
X
X
X
X