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 v oltage 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 w af er
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 V oltage . ..........................................................30 V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C
Storage Temperature . ....................................... - 65°C to + 150°C
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, D2Pac or SMD-1 Packages (3A).
OMR186 products are packaged in the TO-257, D2Pac 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
= 25°C unless otherwise noted)
Parameter Conditions Min. Typ. Max. Units
Reference V oltage I
OUT
= 10 mA, Tj= 25°C
(V
IN
- V
OUT
) = 3 V 1.238 1.250 1.262 V
10mA ≤ I
OUT
≤ I
FULL LOAD
1.5 V ≤ (VIN- V
OUT
) ≤ 25 V (Note 3) 1.220 1.250 1.270 V
Line Regulation I
LOAD
= 10 mA, 1.5 V ≤ (VIN- V
OUT
) ≤ 15 V, 0.015 0.2 %
T
j
= 25°C 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
Tj= 25°C 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
= 25°C, 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 µF Tantalum
I
OUT
- I
FULL LOAD (VIN
- V
OUT
) = 3 V 60 75 dB
Adjust Pin Current T
J
= 25°C 55 µA
Adjust Pin Current Change 10mA ≤ I
OUT
≤ I
FULL LOAD
1.5 V ≤ (VIN- V
OUT
) ≤ 25 V 0.2 5 µA
Temperature Stability -55°C ≤ T
J
≤ +150°C 0.5 %
Long T erm Stability T
A
= 125°C, 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, 100°C 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 Vie ws 100%
Conformance Inspection** GR A 100% GR A 100%
Final Visual Inspection 2009 Sample 2009 Sample
*Note: For “B” Level Screening add “M” to par t number, for “S” Level Screening add “S” to par t
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
012345678910
Output Current (A)
OMR183 Dropout Voltage
TJ = 25°C
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
012
Output Current (A)
OMR186 Dropout Voltage
TJ = 25°C
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
0123456
Output Current (A)
OMR184 Dropout Voltage
TJ = 25°C
Minimum Input/Output Differential (V)
2
1
0
01234
Output Current (A)
OMR185 Dropout Voltage
TJ = 25°C
Short Circuit Current (A)
12
10
8
6
4
2
0
50 101520253035
Input/Output Differential (V)
OMR183 Short Circuit Current
TJ = 150°C
TJ = -55°C
I
FULL LOAD
TJ = 25°C
Short Circuit Current (A)
10
9
8
6
6
5
4
3
2
1
0
50 10 15 20 25 30 35
Input/Output Differential (V)
OMR184 Short Circuit Current
TJ = 25°C
TJ = -55°C
I
FULL LOAD
TJ = 150°C
Short Circuit Current (A)
6
5
4
3
2
1
0
50 10 15 20 25 30 35
Input/Output Differential (V)
OMR185 Short Circuit Current
TJ = 25°C
TJ = -55°C
I
FULL LOAD
TJ = 150°C
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
50 10 15 20 25 30 35
Input/Output Differential (V)
OMR186 Short Circuit Current
TJ = 25°C
TJ = -55°C
I
FULL LOAD
TJ = 150°C
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 150µF aluminum
electrolytic or a 22µF 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 150µF or 22µF 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 22µF tantalum or 150µF 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
100µF 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 I
ADJ
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
10µF 10µF Tantalum, 50µF Aluminum None
10µF 22µF Tantalum, 150µF Aluminum 20µF
RADIA TION TEST PR OGRAM
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 an y 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 XXX
OMR184
Test Points XXX
OMR185
Test Points XXXX X X X
OMR186
Test Points XXXX X X
OMR183- OMR186 Series
TYPICAL RADIATION CURVES
OMR183- OMR186 Series
TYPICAL RADIATION CURVES
MECHANICAL OUTLINES
OMR183- OMR186 Series
OMR18XNH
Non-Isolated
Pin 1 - Input
Pin 2 - Adjust
Pin 3 - Output (Case)
Add “H” to part number for TO-205 Package
OMR18XST
Isolated/Front View
Pin 1 - Adjust
Pin 2 - Output
Pin 3 - Input
Tab - Isolated
Add “T” to part number for
TO-257 Package
OMR18XNM
Pin 1 - Input
Pin 2 - Adjust
Pin 3 - Output
Add “M” to part number for
SMD (Surface Mount Package)
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1
2
3
“T” P/N DESIGNATOR
“H” P/N DESIGNATOR
TO-257AA
TO-205AF (TO-39)
SMD-1
PART NUMBER DESIGNATOR
(Example OMR186STM)
OMR 186 S T M
Omnirel Device Isolated Package Screening
Rad-Tolerant Type Package Style Level
Hermetic D2Pac
“R” P/N DESIGNATOR
OMR18XSR
Isolated
Front View
Pin 1 - Adjust
Pin 2 - Output
Pin 3 - Input
Tab - Isolated
Add “R” to part number for
D2Pac Package
“M” P/N DESIGNATOR
205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246
Visit Our Web Site at www.omnirel.com
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