3.5 - 57
3.5
Isolated Hermetic Surface Mount Package
Three Terminal, Fixed Voltage, 1 Amp Low
Dropout Voltage Regulator
4 11 R0
SURF ACE MOUNT 0.5 VOL T LOW DROPOUT
POSITIVE REGULATOR
FEATURES
• Similar To Industry Standard LM2940
• Dropout Voltage Typically 0.5V @ IO= 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
OM2940-15SMOM2940-05SM
OM2940-12SM
3.5 - 58
OM2940-05SM - OM2940-15SM
3.5
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).
Parameter Symbol Test Conditions Notes Min. Max. Unit
Output Voltage V
OUT
V
IN
= 17 V, I
OUT
= 5 mA
1 11.64 12.36
2 11.40 12.60
V
V
IN
= 13.6 V, I
OUT
= 5 mA
1 11.64 12.36
2 11.40 12.60
V
IN
= 14 V, I
OUT
= 5 mA
1 11.64 12.36
2 11.40 12.60
V
IN
= 26 V, I
OUT
= 5 mA
1 11.64 12.36
2 11.40 12.60
V
IN
= 17 V, I
OUT
= 1 A
1 11.64 12.36
2 11.40 12.60
V
IN
= 13.6 V, I
OUT
= 1 A
1 11.64 12.36
2 11.40 12.60
V
IN
= 13.6 V, I
OUT
= 50 mA
1 11.64 12.36
2 11.40 12.60
V
IN
= 17 V, I
OUT
= 50 mA
1 11.64 12.36
2 11.40 12.60
Maximum Line Transient V
LT
V
O
≤ 13 V, R
O
= 100 Ω, t = 20 ms 1, 2 40 V
Reverse Polarity
V
RIN
R
O
= 100 Ω 1, 2 -15
V
Input Voltage DC
Reverse Polarity
V
RIT
R
O
= 100 Ω, t =20 ms 1, 2 -45
V
Input Voltage Transient
Quiescent Current I
Q
V
IN
= 17 V, I
OUT
= 5 mA
120
mA
230
V
IN
= 14 V, I
OUT
= 5 mA
120
230
V
IN
= 26 V, I
OUT
= 5 mA
120
230
V
IN
= 17 V, I
OUT
= 1 A
170
2120
Line Regulation V
RLN
14 V ≤ V
IN
≤ 26 V, 1 ±110
mV
I
OUT
= 5 mA 2 ±180
Load Regulation V
RLD
V
IN
= 17 V, 50 mA ≤ I
OUT
≤ 1 A
1±160
mV
2±220
Dropout Voltage V
DO
I
OUT
= 1 A
1.7
V
21
I
OUT
= 100 mA
1150
mV
2200
Output Noise Voltage V
ON
V
IN
= 17 V, I
O
= 5 mA, 1 1000 µV rms
10 Hz - 100 Hz
Output Impedance R
O
V
IN
= 17 V, I
OUT
= 100 mA dc
1, 2 1 Ω
and 20 mA ac, f
O
= 120 Hz
Short Circuit Current I
OS
V
IN
= 17 V
1 1.2A2 1.0
Ripple Rejection R
R
V
IN
= 17 V + 1 V rms, 1 52
dB
I
OUT
= 5 mA, f = 1 kHz 2 46
Notes: 1. T
A
= 25°C.
2. Over full operating temperature range.
ELECTRICAL CHARACTERISTICS, P/N OM2940-5SM (5 Volts)
-55°C ≤ T
A
≤ 125°C, V
IN
= 10 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter Symbol Test Conditions Notes Min. Max. Unit
Output Voltage V
OUT
V
IN
= 10 V, I
OUT
= 5 mA
1 4.85 5.15
2 4.75 5.25
V
V
IN
= 6 V, I
OUT
= 5 mA
1 4.85 5.15
2 4.75 5.25
V
IN
= 7 V, I
OUT
= 5 mA
1 4.85 5.15
2 4.75 5.25
V
IN
= 26 V, I
OUT
= 5 mA
1 4.85 5.15
2 4.75 5.25
V
IN
= 10 V, I
OUT
= 1 A
1 4.85 5.15
2 4.75 5.25
V
IN
= 6 V, I
OUT
= 1 A
1 4.85 5.15
2 4.75 5.25
V
IN
= 6 V, I
OUT
= 50 mA
1 4.85 5.15
2 4.75 5.25
V
IN
= 10 V, I
OUT
= 50 mA
1 4.85 5.15
2 4.75 5.25
Maximum Line Transient V
LT
V
O
≤ 6 V, R
O
= 100 Ω, t = 20 ms 1, 2 40 V
Reverse Polarity
V
RIN
R
O
= 100 Ω 1, 2 -15
V
Input Voltage DC
Reverse Polarity
V
RIT
R
O
= 100 Ω, t =20 ms 1, 2 -45
V
Input Voltage Transient
Quiescent Current I
Q
V
IN
= 10 V, I
OUT
= 5 mA
120
mA
230
V
IN
= 7 V, I
OUT
= 5 mA
120
230
V
IN
= 26 V, I
OUT
= 5 mA
120
230
V
IN
= 10 V, I
OUT
= 1 A
170
2 120
Line Regulation V
RLN
7 V ≤ V
IN
≤ 26 V, 1 ±55
mV
I
OUT
= 5 mA 2 ±80
Load Regulation V
RLD
V
IN
= 10 V, 50 mA ≤ I
OUT
≤ 1 A
1±65
mV
2 ±120
Dropout Voltage V
DO
I
OUT
= 1 A
1.7
V
21
I
OUT
= 100 mA
1 150mV2 200
Output Noise Voltage V
ON
V
IN
= 10 V, I
O
= 5 mA, 1, 2 700 µV rms
10 Hz - 100 Hz
Output Impedance R
O
V
IN
= 10 V, I
OUT
= 100 mA dc
1, 2 1 Ω
and 20 mA ac, f
O
= 120 Hz
Short Circuit Current I
OS
V
IN
= 10 V
1 1.2A2 1.0
Ripple Rejection R
R
V
IN
= 10 V + 1 V rms, 1 60
dB
I
OUT
= 5 mA, f = 1 kHz 2 50
Notes: 1. T
A
= 25°C.
2. Over full operating temperature range.
3.5 - 59
OM2940-05SM - OM2940-15SM
3.5
ELECTRICAL CHARACTERISTICS, P/N OM2940-15SM (15 Volts)
-55°C ≤ T
A
≤ 125°C, V
IN
= 20 V, I
O
= 1 A, C
OUT
= 22 µF (unless otherwise specified).
Parameter Symbol Test Conditions Notes Min. Max. Unit
Output Voltage V
OUT
V
IN
= 20 V, I
OUT
= 5 mA
1 14.55 15.45
2 14.25 15.75
V
V
IN
= 16.75 V, I
OUT
= 5 mA
1 14.55 15.45
2 14.25 15.75
V
IN
= 17 V, I
OUT
= 5 mA
1 14.55 15.45
2 14.25 15.75
V
IN
= 26 V, I
OUT
= 5 mA
1 14.55 15.45
2 14.25 15.75
V
IN
= 20 V, I
OUT
= 1 A
1 14.55 15.45
2 14.25 15.75
V
IN
= 16.75 V, I
OUT
= 1 A
1 14.55 15.45
2 14.25 15.75
V
IN
= 16.75 V, I
OUT
= 50 mA
1 14.55 15.45
2 14.25 15.75
V
IN
= 20 V, I
OUT
= 50 mA
1 14.55 15.45
2 14.25 15.75
Maximum Line Transient V
LT
V
O
≤ 16 V, R
O
= 100 Ω, t = 20 ms 1, 2 40 V
Reverse Polarity
V
RIN
R
O
= 100 Ω 1, 2 -15
V
Input Voltage DC
Reverse Polarity
V
RIT
R
O
= 100 Ω, t =20 ms 1, 2 -45
V
Input Voltage Transient
Quiescent Current I
Q
V
IN
= 20 V, I
OUT
= 5 mA
120
mA
230
V
IN
= 17 V, I
OUT
= 5 mA
120
230
V
IN
= 26 V, I
OUT
= 5 mA
120
230
V
IN
= 20 V, I
OUT
= 1 A
170
2 120
Line Regulation V
RLN
17 V ≤ V
IN
≤ 26 V, 1 ±125
mV
I
OUT
= 5 mA 2 ±350
Load Regulation V
RLD
V
IN
= 20 V, 50 mA ≤ I
OUT
≤ 1 A
1 ±200mV2 ±400
Dropout Voltage V
DO
I
OUT
= 1 A
1.7
V
21
I
OUT
= 100 mA
1 150mV2 200
Output Noise Voltage V
ON
V
IN
= 20 V, I
O
= 5 mA, 1 1000 µV rms
10 Hz - 100 Hz
Output Impedance R
O
V
IN
= 20 V, I
OUT
= 100 mA ac
1, 2 1 Ω
and 20 mA dc, f
O
= 120 Hz
Short Circuit Current I
OS
V
IN
= 20 V
1 1.2A2 1.0
Ripple Rejection R
R
V
IN
= 20 V + 1 V rms, 1 48
dB
I
OUT
= 5 mA, f = 1 kHz 2 42
Notes: 1. T
A
= 25°C.
2. Over full operating temperature range.
MECHANICAL OUTLINE
PIN CONNECTION
.450
SQ.
.300
4 PLCS.
.050
24 PLCS.
.305
SQ.
.02 x 45°
.090
MAX.
.05 X 45°
MAX. 3 PLCS.
.009 R.
28 PLCS.
.035
PIN 1
PIN 28
BOTTOMTOP SIDE
4
1
26
12
18
Pin 1, 15 thru 28: IN
Pin 2, 3, 13, and 14: GND
Pin 4 thru 12: OUT
OM2940-05SM - OM2940-15SM
3.5
TYPICAL APPLICATIONS
0.9
Inout - Output Differential (V)
0
Output Current (mA)
Dropout Voltage
TJ = 25°C
200 1000800600400
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0
0.1
1.0
Dropout Voltage (V)
-40
Temperature (°C)
Dropout Voltage
vs Temperature
1 A
0 16012040
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
80
500 mA
100 mA
5.10
Output Voltage (5V)
-40
Temperature (°C)
Output Voltage
vs Temperature
0 16012040
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
80
30
-10
Time (µs)
Line Transient Response
0
0V
20
10
0
-10
-20
-30
3V
Output Voltage
Deviation (mV)
Input Voltage
Change (V)
10 20 30 40 50 60
200
Quiescent Current (mA)
0
Input Voltage (V)
Quiescent Current
1 A
180
160
140
120
100
80
60
40
20
0
500 mA
100 mA
5101520253035
50
Quiescent Current (mA)
Temperature (°C)
Quiescent Current
vs Temperature
VIN = V
OUT
+5V
0
40
30
20
10
-40 0 16012040 80
1 A
500 mA
10 mA
50
Quiescent Current (mA)
0
Load Current (A)
Quiescent Current
0.2 1.00.80.4
40
30
20
10
0
0.6
VIN = 14V
V
OUT
= 5V
T
J
= 25°C
95
Ripple Rejection (dB)
1
Frequency (Hz)
Ripple Rejection
10
100k10k
100351k
1M
45
55
65
75
85
VIN = 10V
C
OUT
= 22µF
I
OUT
= 10mA
V
OUT
=5V
0.5
-10
Time (µs)
Load Transient Response
0403010020
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
1.0
0.5
Output Voltage
Deviation (V)
Load Current
Change (A)
VIN = 10V, C
OUT
= 22µF
T
J
= 25°C, V
OUT
=5V
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