OM2940STM
0.5 VOLT LOW DROPOUT POSITIVE FIXED VOLTAGE
REGULATOR APPROVED TO DESC DRAWING
Three Terminal, Fixed Voltage, 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 @ I
O
= 1 A
Output Current in Excess of 1 A
Reverse Battery Protection
Internal Short Circuit Protection
Isolated Hermetic Package
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:
q
JC
(Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
q
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 A
3.3
PART NUMBER DESIGNATOR
Standard Military Drawing Number
5962-8958710MUX
5962-9088401MUX
5962-9088501MUX
Omnirel Part Number
OM2940-5STM
OM2940-12STM
OM2940-15STM
4 11 R1
Supersedes 3 02 R0
3.3 - 97
ELECTRICAL CHARACTERISTICS, P/N OM2940-5 (5 Volt)
Test Conditions are -55°C T
A
125°C, V
IN
= 10 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter
Output Voltage
Symbol
V
OUT
Test Conditions
V
IN
= 10 V, I
OUT
= 5 mA
V
IN
= 6 V, I
OUT
= 5 mA
V
IN
= 7 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
V
IN
= 10 V, I
OUT
= 1 A
V
IN
= 6 V, I
OUT
= 1 A
V
IN
= 6 V, I
OUT
= 50 mA
V
IN
= 10 V, I
OUT
= 50 mA
Maximum Line Transient
Reverse Polarity
Input Voltage DC
Reverse Polarity
V
LT
V
RIN
V
RIT
I
Q
V
O
6 V, R
O
= 100 , t = 20 ms
R
O
= 100
R
O
= 100 , t =20 ms
V
IN
= 10 V, I
OUT
= 5 mA
V
IN
= 7 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
1
V
IN
= 10 V, I
OUT
= 1 A
Line Regulation
Load Regulation
Dropout Voltage
V
RLN
V
RLD
V
DO
7V
V
IN
26 V,
1
2
1
2
1
2
1
2
1, 2
2
±40
±50
±50
±100
.7
1
150
200
700
mV
Notes
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1, 2
1, 2
1, 2
1
2
1
2
1
2
50
100
Min.
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
40
-15
-45
15
20
15
20
15
20
Max.
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
V
V
V
mA
Unit
V
3.3
ELECTRICAL CHARACTERISTICS, P/N OM2940-12 (12 Volt)
Test Conditions are -55°C T
A
125°C, V
IN
= 17 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter
Output Voltage
Symbol
V
OUT
Test Conditions
V
IN
= 17 V, I
OUT
= 5 mA
V
IN
= 13.6 V, I
OUT
= 5 mA
V
IN
= 14 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
V
IN
= 17 V, I
OUT
= 1 A
V
IN
= 13.6 V, I
OUT
= 1 A
V
IN
= 13.6 V, I
OUT
= 50 mA
V
IN
= 17 V, I
OUT
= 50 mA
Maximum Line Transient
Reverse Polarity
Input Voltage DC
Reverse Polarity
Input Voltage Transient
Quiescent Current
V
LT
V
RIN
V
RIT
I
Q
V
O
13 V, R
O
= 100 , t = 20 ms
R
O
= 100
R
O
= 100 , t =20 ms
V
IN
= 17 V, I
OUT
= 5 mA
V
IN
= 14 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
1
V
IN
= 17 V, I
OUT
= 1 A
Line Regulation
Load Regulation
mV
Dropout Voltage
V
mV
µV rms
Output Noise Voltage
Output Impedance
Short Circuit Current
Ripple Rejection
Notes:
V
ON
R
O
I
OS
R
R
V
RLN
V
RLD
V
DO
14 V V
IN
26 V,
I
OUT
= 5 mA
V
IN
= 17 V, 50 mA I
OUT
1 A
I
OUT
= 1 A
I
OUT
= 100 mA
V
IN
= 17 V, I
O
= 5 mA,
10 Hz - 100 Hz
V
IN
= 17 V, I
OUT
= 100 mA dc
and 20 mA ac, f
O
= 120 Hz
V
IN
= 17 V
V
IN
= 17 V + 1 V rms,
I
OUT
= 5 mA, f = 1 kHz
1
2
1
2
1
2
1
2
1
2
±75
±120
±120
±190
.7
1
150
200
1000
Notes
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1, 2
1, 2
1, 2
1
2
1
2
1
2
50
60
mV
mV
V
mV
µV rms
Min.
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
40
-15
-45
15
20
15
20
15
20
Max.
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
V
V
V
mA
Unit
V
OM2940STM
3.3 - 98
Input Voltage Transient
Quiescent Current
I
OUT
= 5 mA
V
IN
= 10 V, 50 mA I
OUT
1 A
I
OUT
= 1 A
I
OUT
= 100 mA
Output Noise Voltage
Output Impedance
Short Circuit Current
Ripple Rejection
Notes:
V
ON
R
O
I
OS
R
R
V
IN
= 10 V, I
O
= 5 mA,
10 Hz - 100 Hz
V
IN
= 10 V, I
OUT
= 100 mA dc
and 20 mA ac, f
O
= 120 Hz
V
IN
= 10 V
V
IN
= 10 V + 1 V rms,
I
OUT
= 5 mA, f = 1 kHz
1. T
A
= 25°C
.
2. Over full operating temperature range.
1, 2
1
2
1
2
1.5
1.3
60
50
1
A
dB
1, 2
1
2
1
2
1.6
1.3
52
46
1
A
dB
1. T
A
= 25°C
.
2. Over full operating temperature range.
ELECTRICAL CHARACTERISTICS, P/N OM2940-15 (15Volt)
Test Conditions are -55°C T
A
125°C, V
IN
= 20 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter
Output Voltage
Symbol
V
OUT
Test Conditions
V
IN
= 20 V, I
OUT
= 5 mA
V
IN
= 16.75 V, I
OUT
= 5 mA
V
IN
= 17 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
V
IN
= 20 V, I
OUT
= 1 A
V
IN
= 16.75 V, I
OUT
= 1 A
V
IN
= 16.75 V, I
OUT
= 50 mA
V
IN
= 20 V, I
OUT
= 50 mA
Maximum Line Transient
Reverse Polarity
Input Voltage DC
Reverse Polarity
Input Voltage Transient
Quiescent Current
V
LT
V
RIN
V
RIT
I
Q
V
O
16 V, R
O
= 100 , t = 20 ms
R
O
= 100
R
O
= 100 , t =20 ms
V
IN
= 20 V, I
OUT
= 5 mA
V
IN
= 17 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
V
IN
= 20 V, I
OUT
= 1 A
Line Regulation
Load Regulation
Dropout Voltage
V
RLN
V
RLD
V
DO
17 V V
IN
26 V,
I
OUT
= 5 mA
V
IN
= 20 V, 50 mA I
OUT
1 A
I
OUT
= 1 A
I
OUT
= 100 mA
Output Noise Voltage
Output Impedance
Short Circuit Current
Ripple Rejection
Notes:
V
ON
R
O
I
OS
R
R
V
IN
= 20 V, I
O
= 5 mA,
10 Hz - 100 Hz
V
IN
= 20 V, I
OUT
= 100 mA ac
and 20 mA dc, f
O
= 120 Hz
V
IN
= 20 V
V
IN
= 20 V + 1 V rms,
I
OUT
= 5 mA, f = 1 kHz
Notes
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1, 2
1, 2
1, 2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
Min.
14.55
14.25
14.55
14.25
14.55
14.25
14.55
14.25
14.55
14.25
14.55
14.25
14.55
14.25
14.55
14.25
40
-15
-45
15
20
15
20
15
20
50
60
±95
±150
±150
±240
.7
1
150
200
1000
Max.
15.45
15.75
15.45
15.75
15.45
15.75
15.45
15.75
15.45
15.75
15.45
15.75
15.45
15.75
15.45
15.75
Unit
V
PIN CONNECTION
Tab
1
V
V
V
mA
2
3
Front View
Pin 1: V
IN
Pin 2: Gnd
Pin 3: V
OUT
Tab: Isolated
MECHANICAL OUTLINE
.420
.410
.200
.190
.045
.035
.665
.645
.537
.527
.430
.410
.038 MAX.
3.3 - 99
.150
.140
mV
mV
V
mV
µV rms
.750
.500
.005
1, 2
1
2
1
2
1.6
1.3
48
42
1
A
dB
.035
.025
.100 TYP.
.120 TYP.
1. T
A
= 25°C
.
2. Over full operating temperature range.
NOTES
• Case is metal/hermetically sealed
• Isolated Tab
OM2940STM
3.3
单片机
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