OMNIREL OM2940STM Datasheet
0.5 VOLT LOW DROPOUT POSITIVE FIXED VOLTAGE
REGULATOR APPROVED TO DESC DRAWING
Three T erminal, Fixed V oltage, 1 Amp
Low Dropout Voltage Regulator In
Hermetic JEDEC TO-257AA Package
FEATURES
• Similar To Industry Standard LM2940
• Approved To DESC Standardized Military Drawing
• Dropout Voltage Typically 0.5 V @ IO= 1 A
• Output Current in Excess of 1 A
• Reverse Battery Protection
• Internal Short Circuit Protection
• Isolated Hermetic Package
OM2940STM
DESCRIPTION
These three terminal fixed voltage regulators are designed to provide 1.0A with high
efficiency. It has the ability to source 1A of output current with a typical dropout
voltage of .5V and a maximum of 1V over the entire temperature range. It is supplied
in the hermetic TO-257 package and is ideally suited for Military applications where
small size and high reliability is required.
ABSOLUTE MAXIMUM RATINGS
Input Voltage..........................................................26Vdc
Output Voltage.............................................+5V, +12V, +15Vdc
Operating Junction Temperature Range ........................- 55°C to + 125°C
Storage Temperature Range ..................................- 65°C to + 150°C
Lead Temperature (Soldering 10 seconds) ................................300°C
Thermal Resistance:
qJC(Isolated)......................................................4.2°C/W
qJA...............................................................42°C/W
Maximum Output Current ................................................1.3 A
PART NUMBER DESIGNATOR
Standard Military Drawing Number Omnirel Part Number
5962-8958710MUX OM2940-5STM
5962-9088401MUX OM2940-12STM
5962-9088501MUX OM2940-15STM
3.3
4 11 R1
Supersedes 3 02 R0
3.3 - 97
3.3
OM2940STM
3.3 - 98
ELECTRICAL CHARACTERISTICS, P/N OM2940-5 (5 Volt)
Test Conditions are -55°C TA 125°C, VIN= 10 V, IO= 1 A, C
= 22 µF (unless otherwise specified).
OUT
Parameter Symbol Test Conditions Notes Min. Max. Unit
Output Voltage V
Maximum Line Transient V
Reverse Polarity
Input Voltage DC
Reverse Polarity
Input Voltage Transient
Quiescent Current I
Line Regulation V
Load Regulation V
Dropout Voltage V
Output Noise Voltage V
Output Impedance R
Short Circuit Current I
Ripple Rejection R
Notes: 1. T
= 25°C.
A
2. Over full operating temperature range.
OUT
LTVO
V
RIN
V
RIT
Q
RLN
RLD
DO
ON
O
OS
R
VIN= 10 V, 50 mA I
VIN= 10 V, I
V
IN
VIN= 7 V, I
VIN= 26 V, I
VIN= 10 V, I
VIN= 6 V, I
VIN= 6 V, I
VIN= 10 V, I
= 6 V, I
OUT
OUT
OUT
OUT
OUT
OUT
= 5 mA
= 5 mA
OUT
OUT
= 50 mA
= 50 mA
= 5 mA
= 5 mA
= 1 A
= 1 A
6 V, RO= 100 , t = 20 ms 1, 2 40 V
RO= 100 1, 2 -15
RO= 100 , t =20 ms 1, 2 -45
VIN= 10 V, I
V
IN
V
IN
V
IN
= 7 V, I
= 26 V, I
= 10 V, I
OUT
OUT
OUT
OUT
= 5 mA
= 5 mA
= 5 mA
= 1 A
7 V VIN 26 V, 1 ±40
I
= 5 mA 2 ±50
OUT
OUT
I
= 1 A
OUT
I
= 100 mA
OUT
VIN= 10 V, IO= 5 mA, 1, 2 700 µV rms
10 Hz - 100 Hz
VIN= 10 V, I
and 20 mA ac, fO= 120 Hz
= 100 mA dc
OUT
VIN= 10 V
VIN= 10 V + 1 V rms, 1 60
I
= 5 mA, f = 1 kHz 2 50
OUT
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
1 4.85 5.15
2 4.75 5.25
115
220
115
220
115
220
150
2 100
1 ±50
1 A
2 ±100
1.7
21
1 150
2 200
1, 2 1
1 1.5
2 1.3
ELECTRICAL CHARACTERISTICS, P/N OM2940-12 (12 Volt)
Test Conditions are -55°C TA 125°C, VIN= 17 V, IO= 1 A, C
Parameter Symbol Test Conditions Notes Min. Max. Unit
Output Voltage V
V
Maximum Line Transient V
Reverse Polarity
V
Input Voltage DC
Reverse Polarity
V
Input Voltage Transient
Quiescent Current I
mA
Line Regulation V
mV
Load Regulation V
mV
Dropout Voltage V
V
mV
Output Noise Voltage V
Output Impedance ROVIN= 17 V, I
Short Circuit Current I
A
Ripple Rejection R
dB
Notes: 1. T
= 25°C.
A
2. Over full operating temperature range.
OUT
LTVO
V
RIN
V
RIT
Q
RLN
RLD
DO
ON
OS
R
VIN= 17 V, I
V
IN
VIN= 14 V, I
VIN= 26 V, I
VIN= 17 V, I
VIN= 13.6 V, I
VIN= 13.6 V, I
VIN= 17 V, I
= 13.6 V, I
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
= 50 mA
= 5 mA
= 5 mA
= 5 mA
= 5 mA
= 1 A
= 1 A
= 50 mA
13 V, RO= 100 , t = 20 ms 1, 2 40 V
RO= 100 1, 2 -15
RO= 100 , t =20 ms 1, 2 -45
VIN= 17 V, I
V
IN
V
IN
V
IN
= 14 V, I
= 26 V, I
= 17 V, I
= 5 mA
OUT
= 5 mA
OUT
= 5 mA
OUT
= 1 A
OUT
14 V VIN 26 V, 1 ±75
I
= 5 mA 2 ±120
OUT
VIN= 17 V, 50 mA I
I
I
OUT
OUT
OUT
= 1 A
= 100 mA
VIN= 17 V, IO= 5 mA, 1 1000 µV rms
10 Hz - 100 Hz
= 100 mA dc
OUT
and 20 mA ac, fO= 120 Hz
VIN= 17 V
VIN= 17 V + 1 V rms, 1 52
I
= 5 mA, f = 1 kHz 2 46
OUT
= 22 µF (unless otherwise specified).
OUT
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
1 11.64 12.36
2 11.40 12.60
115
220
115
220
115
150
1 ±120
1 A
2 ±190
1.7
21
1 150
2 200
1, 2 1
1 1.6
2 1.3
V
V
V
mA
220
260
mV
mV
V
mV
A
dB
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