PD-94473A
Ultra Low Dropout
Linear Regulator
Hermetic Package
Product Summary
Part Number
OM8508SC
OM8508SF
Vin
5.0 V
5.0 V
Vout
3.3V
3.3V
I
O
Package
3.0A
MO-078AA
3.0A 8-lead Flatpack
OM8508SC
OM8508SF
+5.0Vin to +3.3Vout at 3.0A
MO-078AA
Features:
The OM8508 is an ultra low dropout linear regulator de-
signed specifically for hi-rel applications. Housed in ei-
ther a 5 pin through hole or 8 lead surface mount pack-
age, these regulators provide high reliability in military/
defense applications. The low dropout voltage of 0.4V @
3A makes the part particularly useful for applications re-
quiring low noise and higher efficiency.
n
Ultra low dropout voltage of 0.4 volt
n
n
n
n
significantly 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
Available H-level screened
Absolute Maximum Ratings
Symbol
Io
V in
P
TOT
RTHJC
R
THJC
TJ
TSTG
T
L
Parameter
Output Current
Input Voltage
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
19
6.5
6.5
-55 to +125
-65 to +150
300
Units
A
V
W
擄C/W
擄C/W
o
C
o
C
o
C
www.irf.com
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8/20/02
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