OM2940-05SM OM2940-15SM
OM2940-12SM
SURFACE MOUNT 0.5 VOLT LOW DROPOUT
POSITIVE REGULATOR
Isolated Hermetic Surface Mount Package
Three Terminal, Fixed Voltage, 1 Amp Low
Dropout Voltage Regulator
FEATURES
•
•
•
•
•
•
Similar To Industry Standard LM2940
Dropout Voltage Typically 0.5V @ I
O
= 1A
Output Current Up To 1A
Reverse Battery Protection
Internal Short Circuit Protection
Isolated Hermetic Surface Mount 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 a hermetic surface mount package and is ideally suited for Military applications
where small size and high reliability are required.
ABSOLUTE MAXIMUM RATINGS
@ 25°C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Vdc
Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5V, +12V, +15 Vdc
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:
θ
JC
(Isolated). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0A
a
3.5
4 11 R0
3.5 - 57
ELECTRICAL CHARACTERISTICS, P/N OM2940-5SM (5 Volts)
ELECTRICAL CHARACTERISTICS, P/N OM2940-12SM (12 Volts)
-55°C ≤ T
A
≤ 125°C, V
IN
= 17 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Unit
V
V
IN
= 17 V, I
OUT
= 5 mA
V
IN
= 13.6 V, I
OUT
= 5 mA
2
1
2
1
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
V
Maximum Line Transient
V
V
mA
V
RIN
V
RIT
I
Q
V
LT
V
O
≤ 13 V, R
O
= 100 , t = 20 ms
Ω
R
O
= 100 Ω
R
O
= 100 , t =20 ms
Ω
V
IN
= 17 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
Line Regulation
mV
Load Regulation
mV
Dropout Voltage
V
mV
µV rms
Output Noise Voltage
Output Impedance
1
1.2
1.0
1
2
60
50
Ω
A
dB
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
Parameter
Output Voltage
Symbol
V
OUT
Test Conditions
Notes
1
2
1
11.40
11.64
11.40
11.64
Min.
11.64
11.40
11.64
Test Conditions
V
IN
= 10 V, I
OUT
= 5 mA
V
IN
= 6 V, I
OUT
= 5 mA
2
1
4.75
4.85
5.25
5.15
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
V
LT
V
O
≤ 6 V, R
O
= 100 , t = 20 ms
Ω
R
O
= 100 Ω
R
O
= 100 , t =20 ms
Ω
V
IN
= 10 V, I
OUT
= 5 mA
V
IN
= 7 V, I
OUT
= 5 mA
V
IN
= 26 V, I
OUT
= 5 mA
2
1
2
120
30
70
V
IN
= 10 V, I
OUT
= 1 A
V
RLN
7 V ≤ V
IN
≤ 26 V,
I
OUT
= 5 mA
V
IN
= 10 V, 50 mA ≤ I
OUT
≤ 1 A
I
OUT
= 1 A
I
OUT
= 100 mA
V
ON
R
O
V
IN
= 10 V, I
OUT
= 100 mA dc
and 20 mA ac, f
O
= 120 Hz
I
OS
V
IN
= 10 V
V
IN
= 10 V + 1 V rms,
I
OUT
= 5 mA, f = 1 kHz
R
R
1
2
1, 2
V
IN
= 10 V, I
O
= 5 mA,
10 Hz - 100 Hz
V
RLD
V
DO
1
2
1
2
1
20
30
20
30
20
1, 2
-45
1, 2
-15
1, 2
40
V
RIN
V
RIT
I
Q
2
1
2
1
2
1
2
1
2
1
2
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
4.85
4.75
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
5.15
5.25
-55°C ≤ T
A
≤ 125°C, V
IN
= 10 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Notes
1
2
1
Min.
4.85
4.75
4.85
Max.
5.15
5.25
5.15
3.5
Unit
V
Parameter
Output Voltage
Symbol
V
OUT
Max.
12.36
12.60
12.36
12.60
12.36
12.60
12.36
OM2940-05SM - OM2940-15SM
2
1
2
1
2
1
2
1
2
1, 2
1, 2
1, 2
1
2
1
2
1
2
1
2
11.40
11.64
11.40
11.64
11.40
11.64
11.40
11.64
11.40
40
-15
-45
12.60
12.36
12.60
12.36
12.60
12.36
12.60
12.36
12.60
V
V
V
20
30
20
30
20
30
70
120
mA
Maximum Line Transient
Reverse Polarity
Input Voltage DC
Reverse Polarity
Input Voltage Transient
Quiescent Current
Reverse Polarity
Input Voltage DC
Reverse Polarity
Input Voltage Transient
Quiescent Current
3.5 - 58
1
2
1
2
1
2
1
2
1, 2
±55
±80
±65
±120
.7
1
150
200
700
Line Regulation
mV
mV
V
mV
1
1000
µV rms
Load Regulation
Dropout Voltage
1
2
1
2
1
2
1
2
±110
±180
±160
±220
.7
1
150
200
Output Noise Voltage
Output Impedance
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. T
A
= 25°C
.
2. Over full operating temperature range.
1, 2
1
2
1
2
1.2
1.0
52
46
1
Ω
A
dB
Short Circuit Current
Ripple Rejection
Notes:
1. T
A
= 25°C
.
2. Over full operating temperature range.
ELECTRICAL CHARACTERISTICS, P/N OM2940-15SM (15 Volts)
Symbol
V
OUT
V
IN
= 20 V, I
OUT
= 5 mA
V
IN
= 16.75 V, I
OUT
= 5 mA
2
1
2
1
2
1
2
1
2
1
2
1
2
1, 2
1, 2
V
V
20
mA
1, 2
1
-45
-15
40
V
14.25
15.75
14.25
14.55
15.75
15.45
14.25
14.55
15.75
15.45
14.55
14.25
14.55
15.45
15.75
15.45
14.25
15.75
14.25
14.55
15.75
15.45
14.25
14.55
15.75
15.45
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
V
LT
V
O
≤ 16 V, R
O
= 100 , t = 20 ms
Ω
R
O
= 100 Ω
R
O
= 100 , t =20 ms
Ω
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
V
RLN
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
V
ON
1
R
O
I
OS
V
IN
= 20 V
V
IN
= 20 V + 1 V rms,
I
OUT
= 5 mA, f = 1 kHz
R
R
V
RLD
V
DO
mV
V
RIN
V
RIT
I
Q
V
Test Conditions
Notes
1
2
1
Min.
14.55
14.25
14.55
Max.
15.45
15.75
15.45
Unit
-55°C ≤ T
A
≤ 125°C, V
IN
= 20 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter
Output Voltage
PIN CONNECTION
Pin 1, 15 thru 28: IN
Pin 2, 3, 13, and 14: GND
Pin 4 thru 12: OUT
Maximum Line Transient
Reverse Polarity
Input Voltage DC
3.5 - 59
.450
SQ.
2
1
2
1
2
1
2
30
20
30
20
30
70
120
mV
V
mV
1000
µV rms
1
2
1
2
1
2
1
2
±125
±350
±200
±400
.7
1
150
200
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
1, 2
1
2
1
2
1.2
1.0
48
42
1
Ω
A
dB
Reverse Polarity
Input Voltage Transient
Quiescent Current
MECHANICAL OUTLINE
.090
MAX.
.02 x 45°
.035
4
PIN 1
PIN 28
1
26
TOP
.05 X 45°
MAX. 3 PLCS.
SIDE
.300
4 PLCS.
.050
24 PLCS.
12
.305
SQ.
18
.009 R. BOTTOM
28 PLCS.
Line Regulation
Load Regulation
Dropout Voltage
Output Noise Voltage
Output Impedance
Short Circuit Current
Ripple Rejection
OM2940-05SM - OM2940-15SM
Notes:
1. T
A
= 25°C
.
2. Over full operating temperature range.
3.5
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