PD-94475D
Ultra Low Dropout
Linear Regulator
OMR9601SC
+3.3Vin to +2.5Vout at 3.0A
Product Summary
Part Number
OMR9601SC
Dropout
0.4V
I
O
3.0A
V
in
3.3V
V
out
2.5V
MO-078AA
Features:
The OMR9601SC is a space qualified, ultra low dropout
linear regulator designed specifically for space
applications. This product has been characterized to a total
ionizing dose of 1.0 Mrad (Si) per MIL-STD-883, Method
1019, Condition D 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 to 1.0 Mrad (Si) and low dose
n
n
n
n
n
n
n
capabilitiy to 500 krad (Si) allows use in
space applications
Single Event latchup Immune
LET= 84 MeV/(mg/cm
2
)
Fluency = 1x10
9
ions/cm
2
Low noise, higher efficiency
Ultra low dropout voltage of 0.4V@ 3A out
significantly reduces power consumption
Remote shutdown permits power
sequencing to be easily implemented
Hermetic MO-078AA (TO-258AA)
pack ensures higher reliability
K-level screened
This part is also available in
8-Lead Flat Pack Package as OMR9601SF
Absolute Maximum Ratings
Parameter
Output Current
Input Voltage
Power Dissipation T
C
= 25°C
Thermal Resistance, Junction to Case
Operating Temperature Range
Storage Temperature Range
Lead Temperature
Symbol
I
O
V
in
P
TOT
R
THJC
T
J
T
S
T
L
Value
3.5
7
19
6.5
-55 to +125
-65 to +150
300
Units
A
V
W
°C/W
°C
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1
09/02/04
OMR9601SC
Electrical Characteristics @T
a
= 25°C (Unless Otherwise Specified)
Pre-Radiation
Parameter
Test Conditions
V
in
= 3.3V, I
O
= 1.5A
V
in
= 3.135V, I
O
= 50mA
Output Voltage
V
in
= 3.135V, I
O
= 3.0A
V
in
= 3.465V, I
O
= 50mA
V
out
Symbol
Min.
2.475
2.375
2.375
2.375
2.375
2.9
--
3.0
65
-
1.0
-0.1
Typ.
2.5
-
-
-
-
-
-
-
-
200
-
-
Max.
2.525
2.625
2.625
2.625
2.625
6.5
0.4
-
-
-
1.6
+0.1
Units
V
V
in
= 3.465V, I
O
= 3.0A
Input Voltage Range - Operating I
O
= 3.0A
I
O
= 3.0A, V
out
= 2.5V
Dropout Voltage
V
in
= 3.3V, Overcurrent Latch Up
Current Limit
Ripple Rejection
Shutdown Source Current
Shutdown Pin Threshold
F = 120Hz, I
out
= 50mA
V
shdn
= 5.0V
V
in
= 3.3V
V
in
= 3.3V, I
O
= 50mA, Vshdn = +5.0V
V
in
V
drop
I
latch
I
shdn
V
shdn
V
out (shdn)
A
dB
µA
V
c
Output Voltage at Shutdown
Electrical Characteristics @T
a
= -55°C to 125°C (Unless Otherwise Specified)
Pre-Radiation
Parameter
Test Conditions
V
in
= 3.3V, I
O
= 1.5A
V
in
= 3.135V, I
O
= 50mA
Output Voltage
V
in
= 3.135V, I
O
= 3.0A
V
in
= 3.465V, I
O
= 50mA
V
out
Symbol
Min.
2.375
2.375
2.375
2.375
2.375
2.9
-
3.0
65
-
1.0
-0.1
Typ.
2.5
-
-
-
-
-
-
-
-
200
-
-
Max.
2.625
2.625
2.625
2.625
2.625
6.5
0.4
-
-
-
1.6
+0.1
Units
V
V
in
= 3.465V, I
O
= 3.0A
Input Voltage Range - Operating I
O
= 3.0A
I
O
= 3.0A, V
out
= 2.5V
Dropout Voltage
V
in
= 3.3V, Overcurrent Latch Up
Current Limit
Ripple Rejection
Shutdown Source Current
Shutdown Pin Threshold
F = 120Hz, I
out
= 50mA
V
shdn
= 5.0V
V
in
= 3.3V
V
in
= 3.3V, I
O
= 50mA, Vshdn = +5.0V
V
in
V
drop
I
latch
I
shdn
V
shdn
V
out (shdn)
A
dB
µA
V
c
Output Voltage at Shutdown
Refer page 3 for Notes for Electrical Characteristic Tables
2
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OMR9601SC
Electrical Characteristics @T
a
= 25°C (Unless Otherwise Specified)
Post-Radiation
Parameter
Test Conditions
V
in
= 3.3V, I
O
= 1.5A
V
in
= 3.135V, I
O
= 50mA
Output Voltage
V
in
= 3.135V, I
O
= 3.0A
V
in
= 3.465V, I
O
= 50mA
V
in
= 3.465V, I
O
= 3.0A
V
in
= 3.3V
F = 120Hz, I
out
= 50mA
V
in
= 3.3V, I
O
= 50mA, Vshdn = +5.0V
V
out (shdn)
V
out
Symbol
Min.
2.375
2.375
2.375
2.375
2.375
3.0
40
-0.1
Typ.
-
-
-
-
-
-
-
-
Max.
2.625
2.625
2.625
2.625
2.625
-
-
+0.1
Units
V
Current Limit
Ripple Rejection
Output Voltage at Shutdown
I
max
A
dB
V
Notes for Electrical Characteristic Tables
V
Shutdown
ramp from 0.8V to 4.8V, output monitored for a 100mV drop below the nominal specification for V
out
Pre-Radiation Characteristics
OMR9601 Ripple Rejection vs. Frequency
120
100
80
(db)
60
40
20
0
100
3A
1.5A
.75A
.50A
1,000
10,000
Frequency (Hz)
100,000
1,000,000
Fig 1. Ripple Rejection Vs Frequency
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OMR9601SC
Post-Radiation Characteristics
Total Ionizing Dose (TID)
2.70
2.68
2.66
2.64
2.62
2.60
Vout (V)
2.58
2.56
2.54
2.52
2.50
2.48
2.46
1
10
Total Dose Level (krads)
100
1000
Test Data (Reg. Dr.)
no load @ 50 r/s, 25
0
C
Hybrid Regulator
Biased @ 90 r/s
25
0
C
Hybrid Regulator
Unbiased @90 r/s
25
0
C
Fig 2. Voltage Output Vs Total Ionizing Dose
Fig 3. Voltage Output Vs Total Ionizing Dose
4
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OMR9601SC
Post-Radiation Characteristics
Enhanced Low Dose Rate Sensitivity (Dose Rate = 0.1 Rad/s)
Fig 4. Voltage Output Vs Total Ionizing Dose
Single Event Latch-up
Fig 5. Voltage Output Vs Time
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