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DESC APPROVED LOW DROPOUT NEGATIVE
Three Terminal, Fixed Voltage,
Low Dropout Negative Voltage Regulator
In Hermetic Packages
F E AT U R E S
Approved To DE S C Standardized Military Drawings
Low Dropout Voltage, 0.6 V @ I
O
= 1 A
Output Current in Excess of 1 A [LCC 20 (N2) package limited to 0.3A]
Reverse Battery Protection
Internal Short Circuit Protection
Isolated and Non-Isolated Hermetic Package Types
Output Voltages: - 5V, -5.2V, -12V, & -15V
DESCRIPTION
The OM2990 series of fixed voltage regulators are designed to provide up to 1.5A with
high efficiency. It has the ability to source 1A of output current with a typical dropout
voltage of 0.6V and a maximum of 1V over the entire operating temperature range. It is
supplied in hermetic packages and is ideally suited for all applications where small size
and high reliability are required.
ABSOLUTE MAXIMUM RATINGS, T
C
= 25C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -26 V to +0.3V
Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5 V, -5.2 V,-12 V, -15 V dc
Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55C to + 125C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C
Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300C
Thermal Resistance: Junction to Case
Case 2, LCC20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.5C/W
Case U&M, TO-257 (isolated) & SMD-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.8C/W
Case T&N, TO-257 (non-isolated) & SMD-1. . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0C/W
Case Y, TO-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7C/W
Maximum Output Current
Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.3A
Case U & M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A
Case T, N & Y. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5A
OM2990-XNM
7 01 R3
Supersedes 5 04 R2
OM2990-XNK
OM2990-XST
1.1
1.1
1.3
1.3
1.4
2.1
2.2
2.3
2.4
3.1
3.2
APPROVED DESC DRAW I N G
OMNIREL P/N
5962-9571101MUA
OM2990 - 5 STM
5962-9571002MUA
OM2990 - 5.2 STM
5962-9571001MUA
OM2990 - 12 STM
Please see mechanical
outlines herein
1.1
1.1
1.3
1.3
1.4
2.1
2.2
2.3
2.4
3.1
3.2
ELECTRICAL CHARACTERISTICS, OM2990-5NK, NM, NT (-5 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-5.10
-4.90
V
2
-5.25
-4.75
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1.0A , V
IN
= -5 V
1,2
50
Line Regulation
V
R L N
-6 V V
IN
-26 V,
1
+40
m V
I
O U T
= 5 mA
2
+50
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+50
m V
2
+100
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
750
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
1.5
A
2
1.3
Maximum Output Current
I
M A X
1
1.5
A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
ELECTRICAL CHARACTERISTICS, OM2990-12NK, NM, NT (-12 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -17 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0A
1
-12.24
-11.76
V
2
-12.60
-11.40
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1A, V
IN
= -12 V
1,2
50
Line Regulation
V
R L N
-13 V V
IN
-26 V
1
+65
m V
I
O U T
= 5 mA
2
+80
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+80
m V
2
+120
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1500
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
.90
A
2
.75
Maximum Output Current
I
M A X
1
1.4
A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
ELECTRICAL CHARACTERISTICS, OM2990-15NK, NM, NT (-15 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -20 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-15.30
-14.70
V
2
-15.75
-14.25
Quiescent Current
I
Q
I
O
< 1.0A
1
15
m A
2
20
I
O
= 1.0A , V
IN
= -15 V
1,2
50
Line Regulation
V
R L N
-16 V V
IN
-26 V,
1
+75
m V
I
O U T
= 5 mA
2
+120
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+120
m V
2
+190
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1800
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
.75
A
2
.62
Maximum Output Current
I
M A X
1
1.4
A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
circuit level.
ELECTRICAL CHARACTERISTICS, OM2990-5SM, ST (-5 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-5.10
-4.90
V
2
-5.25
-4.75
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1.0A , V
IN
= -5 V
1,2
50
Line Regulation
V
R L N
-6 V V
IN
-26 V,
1
+45
m V
I
O U T
= 5 mA
2
+55
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+70
m V
2
+110
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
750
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1,2
1.27
A
Maximum Output Current
I
M A X
1
1.27
A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
ELECTRICAL CHARACTERISTICS, OM2990-12SM, ST (-12 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -17 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0A
1
-12.24
-11.76
V
2
-12.60
-11.40
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1A, V
IN
= -12 V
1,2
50
Line Regulation
V
R L N
-13 V V
IN
-26 V
1
+65
m V
I
O U T
= 5 mA
2
+80
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+80
m V
2
+120
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1500
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1,2
.75
A
Maximum Output Current
I
M A X
1
1.18
A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
circuit level.
ELECTRICAL CHARACTERISTICS, OM2990-15SM, ST (-15 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -20 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-15.30
-14.70
V
2
-15.75
-14.25
Quiescent Current
I
Q
I
O
< 1.0A
1
15
m A
2
20
I
O
= 1.0A , V
IN
= -15 V
1,2
50
Line Regulation
V
R L N
-16 V V
IN
-26 V,
1
+75
m V
I
O U T
= 5 mA
2
+120
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+120
m V
2
+190
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1800
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
.60
A
2
.50
Maximum Output Current
I
M A X
1
1.4
A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
circuit level.
1.1
1.1
1.3
1.3
1.4
2.1
2.2
2.3
2.4
3.1
3.2
ELECTRICAL CHARACTERISTICS, OM2990- 5N2 (-5 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 300 mA
1
-5.10
-4.90
V
2
-5.25
-4.75
Quiescent Current
I
Q
I
O
< 300 mA
1
7
m A
2
14
I
O
= 300 mA , V
IN
= -5 V
1,2
55
Line Regulation
V
R L N
-6 V V
IN
-26 V,
1
+45
m V
I
O U T
= 5 mA
2
+60
Load Regulation
V
R L D
50 mA I
O U T
300 mA
1
+80
m V
2
+120
Dropout Voltage
V
D O
I
O
= 100 mA
1
.3
V
DV
O
100 mV
2
I
O
= 300 mA
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
800
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
300
m A
2
250
Maximum Output Current
I
M A X
1
300
m A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
ELECTRICAL CHARACTERISTICS, OM2990-12N2 (-12 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -17 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 300 mA
1
-12.24
-11.76
V
2
-12.60
-11.40
Quiescent Current
I
Q
I
O
< 300 mA
1
7
m A
2
14
I
O
= 300 mA, V
IN
= -12 V
1,2
60
Line Regulation
V
R L N
-13 V V
IN
-26 V
1
+75
m V
I
O U T
= 5 mA
2
+110
Load Regulation
V
R L D
50 mA I
O U T
300 mA
1
+120
m V
2
+190
Dropout Voltage
V
D O
I
O
= 100 mA
1
.3
V
DV
O
100 mV
2
I
O
= 300 mA
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1650
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
200
m A
2
175
Maximum Output Current
I
M A X
1
280
m A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
ELECTRICAL CHARACTERISTICS, OM2990-15 N2 (-15 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -20 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 300 mA
1
-15.30
-14.70
V
2
-15.75
-14.25
Quiescent Current
I
Q
I
O
< 300 mA
1
20
m A
2
25
I
O
= 300 mA , V
IN
= -15 V
1,2
60
Line Regulation
V
R L N
-16 V V
IN
-26 V,
1
+85
m V
I
O U T
= 5 mA
2
+130
Load Regulation
V
R L D
50 mA I
O U T
300 mA
1
+135
m V
2
+205
Dropout Voltage
V
D O
I
O
= 100 mA
1
.3
V
DV
O
100 mV
2
I
O
= 300 mA
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
1900
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
150
m A
2
140
Maximum Output Current
I
M A X
1
280
m A
4
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
42
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
4. The short circuit current is less than the maximum output current due to internal foldback current limiting.
The -5V and -5.2V versions do not reach the foldback current limit and therefore conducts a higher short
circuit level.
1.1
1.1
1.3
1.3
1.4
2.1
2.2
2.3
2.4
3.1
3.2
ELECTRICAL CHARACTERISTICS, OM2990-5.2NK, NM, NT (-5.2 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10.2 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-5.30
-5.10
V
2
-5.46
-4.94
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1.0A , V
IN
= -5.2 V
1,2
50
Line Regulation
V
R L N
-6.2 V V
IN
-26 V,
1
+40
m V
I
O U T
= 5 mA
2
+50
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+50
m V
2
+100
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
750
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
1.5
A
2
1.3
Maximum Output Current
I
M A X
1
1.5
A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
ELECTRICAL CHARACTERISTICS, OM2990-5.2SM, ST (-5.2 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10.2 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 1.0 A
1
-5.30
-5.10
V
2
-5.46
-4.94
Quiescent Current
I
Q
I
O
< 1.0A
1
5
m A
2
12
I
O
= 1.0A , V
IN
= -5.2 V
1,2
50
Line Regulation
V
R L N
-6.2 V V
IN
-26 V,
1
+45
m V
I
O U T
= 5 mA
2
+55
Load Regulation
V
R L D
50 mA I
O U T
1.0 A
1
+70
m V
2
+110
Dropout Voltage
V
D O
I
O
= 0.1 A
1
.3
V
DV
O
100 mV
2
I
O
= 1.0 A
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
750
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1,2
1.27
A
Maximum Output Current
I
M A X
1
1.27
A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested
ELECTRICAL CHARACTERISTICS, OM2990-5.2N2 (-5.2 VOLTS)
Test Conditions are -55C T
A
125C, V
IN
= -10.2 V, C
O U T
= 47 F (unless otherwise specified).
Parameter
Symbol
Test Conditions
Notes
Min.
Max.
Unit
Output Voltage
V
O U T
5 mA < I
O
< 300 mA
1
-5.30
-5.10
V
2
-5.46
-4.94
Quiescent Current
I
Q
I
O
< 300 mA
1
7
m A
2
14
I
O
= 300 mA , V
IN
= -5.2 V
1,2
55
Line Regulation
V
R L N
-6.2 V V
IN
-26 V,
1
+45
m V
I
O U T
= 5 mA
2
+60
Load Regulation
V
R L D
50 mA I
O U T
300 mA
1
+80
m V
2
+120
Dropout Voltage
V
D O
I
O
= 100 mA
1
.3
V
DV
O
100 mV
2
I
O
= 300 mA
1
1
DV
O
100 mV
2
Output Noise Voltage
V
O N
I
O
= 5 mA,
3
800
V
10 Hz - 100 kHz
Short Circuit Current
I
O S
R
L
= 1
1
300
m A
2
250
Maximum Output Current
I
M A X
1
300
m A
Ripple Rejection
R
R
V
ripple
= 1 V
m s
1
50
dB
I
O U T
= 5 mA, f = 1 kHz
Notes:
1. T
A
= 25C
.
2. Over full operating temperature range.
3. Guaranteed, not tested