PD-94487A
200 Krad(Si) Ultra Low Dropout
Positive Adjustable Linear Regulator
Hermetic Package
Product Summary
Part Number
OMR9804SC
OMR9804SF
Dropout
0.4 V
0.4 V
I
O
3.0A
3.0A
Vin
Package
3.3V MO-078AA
3.3V 8-Lead Flatpack
OMR9804SF
OMR9804SC
+ 3.3Vin at 3.0A
MO-078AA
Features:
The OMR9804 is a radiation hardened, ultra low dropout
adjusable linear regulator designed specifically for space
applications. This product has been characterized to a
total ionizing dose of 200 Krad (Si) per MIL-STD-883,
Method 1019, Condition A at both high and low dose rates
under biased and unbiased conditions to account for
ELDRS effects in bipolar devices. The ultra low dropout
voltage of 0.4V @ 3A makes the part particularly useful for
applications requiring low noise and higher efficiency.
n
Total dose and low dose capabilitiy to 200
n
n
n
n
n
Krad(Si) allows use in space applications
Ultra low dropout voltage of 0.4 volt signifi
cantly reduces power consumption
Low noise, higher efficiency
Remote shutdown permits power
sequencing to be easily implemented
Hermetic MO-078AA (TO-258AA) and 8-
lead flat pack ensure higher reliability
K-level screened
Absolute Maximum Ratings
Symbol
Io
V in
Vout
P
TOT
RTHJC
R
THJC
TJ
TSTG
T
L
Parameter
Output Current
Input Voltage
Output Voltage Range
Power Dissipation TC=25
o
C
Thermal Resistance, Junction to Case (MO-078AA)
Thermal Resistance, Junction to Case (8 lead flatpack)
Operating Junction
Storage Temperature Range
Lead Temperature
Value
3.5
+7.0
+1.26 to +3.2
19
6.5
6.5
-55 to +125
-65 to +150
300
Units
A
V
V
W
°C/W
°C/W
o
C
o
C
o
C
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1
8/20/02
OMR9804SC, OMR9804SF
Electrical Characteristics
@ T
A
= 25°C (Unless Otherwise Specified)
Parameter
Input Voltage Range-
Operating
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Ripple Rejection
Shutdown source current
Shutdown Pin Threshold
Output Voltage at
Shutdown
Conditions
Io= 3.0A
Symbol
Vin
Vref
Vline
Vload
Vdrop
Ilatch
Min.
2.9
1.252
-100
-5
-20
Typ.
Max
6.5
1.278
+100
+5
+20
0.4
3.0
65
Ishdn
Vshdn
Vout
(shdn)
200
1.0
-0.1
1.6
+0.1
Unit
V
V
mV
mV
mV
V
A
dB
uA
V
V
3.13
≤
Vin
≤
3.46, Io= 3.0A
2.9
≤
Vin
≤
3.8, Io= 50mA
Vin= 3.3V
10ma
≤
I o u t
≤
3.0A
Io= 3.0A. Vout= 2.5V
Vin= 3.3V, Overcurrent
Latchup
F= 120 Hz., Vout= Vref
Vshdn= 5V
Isource= 200uA
Vin= 3.3V, Io= 50mA,
Shdn= +5.0V
1.265
Electrical Characteristics
T
A
= -55 to +125°C
Parameter
Input Voltage Range-
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Ripple Rejection
Shutdown source current
Shutdown Pin Threshold
Output Voltage at
Shutdown
Conditions
Io= 3.0A
3.13
≤
Vin
≤
3.46, Io= 3.0A
2.9
≤
Vin
≤
3.8, Io= 50mA
Vin= 3.3V
10ma
≤
Iout
≤
3.0A
Io= 3.0A. Vout= 2.5V
Vin= 3.3V, Overcurrent
Latchup
F= 120 Hz., Vout= Vref
Vshdn= 5V
Isource= 200uA
Vin= 3.3V, Io= 50mA,
Shdn= +5.0V
Symbol
Vin
Vref
Vline
Vload
Vdrop
Ilatch
Min.
2.9
1.225
-150
-150
-150
Max
6.5
1.265 1.305
+150
+150
+150
0.4
3.0
65
Ishdn
Vshdn
Vout
(shdn)
200
1.0
-0.1
1.6
+0.1
Typ.
Unit
V
V
mV
mV
mV
V
A
dB
uA
V
V
Simplified Schematic
Vin
Drive
Vout
Adjust
Shutdown
Gnd
Ground
2
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OMR9804SC, OMR9804SF
OMR9804 Ripple Rejection vs. Frequency
3A
120
100
80
(db)
60
40
20
0
100
1.5A
.75A
.50A
1,000
10,000
Frequency (Hz)
100,000
1,000,000
Adjust
Resistor
Vin
Vout
OMR9804
100uF 16V
Tantalum
SHDN
GND
ADJ
R1
220uF 6.3V
1.0uF
Ceramic
X7R
Tantalum
Vout =Vref x (1+R1/1000)
In order to maintain regulation and stability speci-
fied additional input and output bulk capacitors are
recommended. Capacitors recommended above
should be low ESR tantalums with tolerances of +/-
20% max. Internal to the product are a 4.7uF input
capacitor and a 4.7uF output capacitor in parallel
with a 0.33uF ceramic capacitor.
Shutdown:
The regulator can be shutdown by apply-
ing a voltage >1.6V to pin 4. The regulator will restart
when the SHDN pin is pulled below the shutdown
threshold of 1.0V. If remote shutdown is not required,
pin 4 shold be connected to GND to insure a safe
“off” state.
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OMR9804SC, OMR9804SF
Mechanical Outline MO-078AA
Base:
GLIDCOP
Pins:
Copper core, Alloy 52
Seals:
Glass
Base
Pin Connections
Terminal
Description
1
Vin
2
GND
3
Vout
4
Shutdown
5
Adjust
1 2 3 4 5
Mechanical Outline 8-Lead Flat Pack
Base:
1010-1018 C.R.S.
Pins:
#52 Alloy, Copper Cored
Seals:
Glass – 9013 or Equiv.
Finish:
100-250 Microinches
Electroless Nickel Over 50-250
Microinches Electrolytic Nickel.
Pin Connections
Terminal
Description
1,2
GND
3
Shutdown
4
Adjust
5,6
Vout
7,8
Vin
0.755
0.745
0.755
0.745
8X 0.080
0.070
8 7 6 5
1 2 3 4
0.110
8x
0.150
0.105
0.225
0.305
0.295
0.095
0.180
0.165
0.040
0.065
0.040
0.065
8X 0.020
0.016
4
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OMR9804SC, OMR9804SF
Part Number Nomenclature
OM
Omnirel
R
Radiation
Hardened/Tolerant
9804
Device
X
X
X
Screening
S=Isolated
Package
N=Non-Isolated
Part Number
OMR9804SCP
OMR9804SCH
OMR9804SCK
OMR9804SFP
OMR9804SFH
OMR9804SFK
Package Description
MO-078AA 5 - Lead
MO-078AA 5 - Lead
MO-078AA 5 - Lead
8 -Lead Flat Pack
8 -Lead Flat Pack
8 -Lead Flat Pack
Screening
100% Final Electrical
Class H per MIL-PRF-38534
Class K per MIL-PRF-38534
100% Final Electrical
Class H per MIL-PRF-38534
Class K per MIL-PRF-38534
MIL-PRF-38534 Screening Requirements
TEST/INSPECTION
SCREENING LEVEL
MIL-STD-883
Class H
Class K
Method
(Space Level)
Pre Seal Burn-In
Optional
Optional
1030
Nondestructive Bond Pull
N/A
100%
2023
Internal Visual
100%
100%
2017
Temperature Cycle
100%
100%
1010
Constant Acceleration
100%
100%
2001
Mechanical Shock
100%
100%
2002
PIND
N/A
100%
2020
Pre Burn-In Electrical
Optional
100%
Burn-In
100%
100%
1015
Final Electrical
100%
100%
Seal
100%
100%
1014
Radiographic
N/A
100%
2012
External Visual
100%
100%
2009
WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245, Tel: (310) 2527105
IR LEOMINSTER:
205 Crawford St., Leominster, Massachusetts 01453, Tel: (978) 5345776
Data and specifications subject to change without notice.
8/2002
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