OMR9601
1 M Rad (Si), ULTRA LOW DROPOUT
POSITIVE LINEAR REGULATOR
+3.3Vin to +2.5V Output at 3.0A
In Hermetic Packages
FEATURES
•
Total dose and low dose capability to 1M Rad (Si) allows use in space applications
•
Ultra low dropout voltage of 0.4V @ 3A out significantly reduces power consumption
•
Low noise, higher efficiency
•
Remote Shutdown permits power sequencing to be easily implemented
•
Hermetic MO-078AA (TO-258) and 8-lead flat pack ensure higher reliability
•
K-level screened
DESCRIPTION
The OMR9601 is a radiation hardened, ultra low dropout linear regulator designed
specifically for space applications. This product has been characterized to a total ionizing
dose of 1M Rad (Si) per MIL-STD-883, Method 1019, Condition A at both high and low
dose rates under biased and unbiased conditions to account for ELDRE 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.
MAXIMUM RATINGS (T
J
=25°C unless otherwise specified)
°
Parameter
Output Current
Input Voltage
Lead Temperature
Power Dissipation, T
C
=25°C
Thermal Resistance, Junction to Case – MO-078AA
Thermal Resistance, Junction to Case – 8 Lead Flat Pack
Operating Temperature
Storage Temperature Range
Symbol
Io
Vin
Tl
P
TOT
R
thJC
R
thJC
T
j
Ts
Value
3.5
+7.0
300
19
6.5
6.5
-55…+125
-65…+150
Unit
A
V
°C
W
°C/W
°C/W
°C
°C
Block Diagram
Vin
O
(Pin 1)
Vout
O
(Pin 3)
Shutdown
O
(Pin 4)
Rev D, 02/14/2002
SHDN
Reg.
Control
GND
(Pin 2)
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
OMR9601
ELECTRICAL CHARACTERISTICS (Ta=25°C unless otherwise specified)
°
Parameter
Conditions
Symbol
Output Voltage
Input Voltage Range-
Operating
Line Regulation
Load Regulation
Vin= 3.3V, Io= 3.0A
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 Short Circuit
F= 120 Hz., Vout= Vref
Vshdn= 5V
Isource= 200uA
Vin= 3.3V, Io= 50mA,
Shdn= +5.0V
Vline
Vload
Vdrop
Isc
Vout
Min.
2.475
2.9
-100
-5
-20
Typ
.
2.5
Max
2.525
6.5
+100
+5
+20
0.4
Unit
V
V
mV
mV
mV
V
A
dB
uA
V
V
Dropout Voltage
Current Limit
Ripple Rejection
Shutdown source current
Shutdown Pin Threshold
Output Voltage at
Shutdown
3.0
65
200
1.0
-0.1
1.6
+0.1
Ishdn
Vshdn
Vout
(shdn)
ELECTRICAL CHARACTERISTICS (Ta= -55 to +125°C)
°
Parameter
Conditions
Output Voltage
Vin= 3.3V, Io= 3.0A
Input Voltage Range-
Operating
Line Regulation
Load Regulation
Dropout Voltage
Current Limit
Ripple Rejection
Shutdown source current
Shutdown Pin Threshold
Output Voltage at Shutdown
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 Short Circuit
F= 120 Hz., Vout= Vref
Vshdn= 5V
Isource= 200uA
Vin= 3.3V, Io= 50mA,
Shdn= +5.0V
Symbol
Vout
Min.
2.375
2.9
Typ.
2.5
Max
2.625
6.5
+150
+150
+150
0.4
Unit
V
V
mV
mV
mV
V
A
B
uA
V
V
Vline
Vload
Vdrop
Isc
-150
-150
-150
3.0
65
200
1.0
-0.1
1.6
+0.1
Ishdn
Vshdn
Vout
(shdn)
Rev D, 02/14/2002
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
OMR9601
Post Radiation Characteristics
Low Dose Rate Characteristics (0.1 Rads (Si)/Sec)
Typical Voltage Output
2.600
2.550
Vout (V)
2.500
Low Dose Rate
0.1 rad(Si)/sec
2.450
Conditions:
Vin = 3.3vdc
Iload = 10 ma
2.400
1
10
Total Dose Level (krads)
100
1000
OMR9601 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
Rev D, 02/14/2002
205 Crawford Street
•
Leominster MA 01453
•
Phone: 978 534 5776
•
Fax: 978 537 4246
•
www.omnirel.com
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