OM1322SMM OM1322NMM
OM1322NKM OM1322NTM
OM1322STM
OM1322N2M
1.5 AMP NEGATIVE ADJUSTABLE VOLTAGE
REGULATOR APPROVED TO DESC DRAWING 7703403
Three Terminal, Precision Adjustable
Negative Voltage Regulator In Hermetic
Style Packages (LM137)
Please see mechanical
outlines herein
FEATURES
•
•
•
•
•
Similar To Industry Standard LM137
Approved To DESC Standardized Military Drawing Number 7703403
Built In Thermal Overload Protection
Short Circuit Current Limiting
Available In Six Package Styles
DESCRIPTION
These three terminal negative regulators are supplied in hermetically sealed
packages. All protective features are designed into the circuit, including thermal
shutdown, current-limiting, and safe-area control. With heat sinking, these devices
can deliver up to 1.5 amps of output current. The LCC-20 device is limited to .5
amps. The unit also features output voltages that can be fixed from -1.2 volts to -37
volts using external resistors.
ABSOLUTE MAXIMUM RATINGS
T
c
@ 25°C
Power Dissipation
Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W
Case-All Others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W
Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V
Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65°C to + 150°C
Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
Thermal Resistance, Junction to Case:
Case 2, LCC-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17°C/W
Case U & M, TO-257 (Isol) and SMD-3 . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
Case T&N, TO-257 (Non-Isol) and SMD-1 . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W
Case Y, TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W
Maximum Output Current:
Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 A
Case-All Others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A
Recommended Operating Conditions:
Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1.2 to -37 VDC
Ambient Operating Temperature Range (T
A
) . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.25 to -41.25 VDC
4 11 R2
Supersedes 1 07 R1
3.5
3.5 - 9
OM1322NTM, OM1322STM, OM1322NKM, OM1322SMM, OM1322NMM, OM1322N2M
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
Symbol
V
REF
-55°C ≤ T
A
≤ 125°C, I
L
= 8mA (unless otherwise specified)
OM1322NTM, OM1322STM, OM1322NKM, OM1322SMM, OM1322NMM
Test Conditions
V
DIFF
= 3.0V, T
A
= 25°C
V
DIFF
= 3.0V
V
DIFF
= 40V, T
A
= 25°C
V
DIFF
= 40V
Line Regulation
(Note 1)
Load Regulation
(Note 1)
R
LOAD
R
LINE
3.0 V ≤
V
DIFF
≤ 40V, T
A
= 25°C
3.0 V ≤
V
DIFF
≤ 40V
V
DIFF
= 5.0V, 8mA ≤ I
L
≤ 1.5A
V
DIFF
= 12V, 8mA ≤ I
L
≤ 1.5A, T
A
= 25°C
V
DIFF
= 40V, 8mA ≤ I
L
≤ 200mA, T
A
= 25°C
V
DIFF
= 40V, 8mA ≤ I
L
≤ 100mA
Thermal Regulation
V
RTH
V
in
= -14.6V, I
L
= 1.5A
P
d
= 20 Watts, t = 10 ms, T
A
= 25°C
Ripple Rejection
(Note 2)
Adjustment Pin Current
I
Adj
R
N
f = 120 Hz, V
out
= V
ref
C
Adj
= 10 µF
V
DIFF
= 3.0V
V
DIFF
= 40V
Adjustment Pin
Current Change
Miminum Load Current
∆I
Adj
(Line)
∆I
Adj
(Load)
I
Lmin
3.0V ≤
V
DIFF
≤ 40V
V
DIFF
= 5V, 8mA ≤ I
L
≤ 1.5A
V
DIFF
= 3.0V, V
out
= -1.4V (forced)
V
DIFF
= 10V, V
out
= -1.4V (forced)
V
DIFF
= 40V, V
out
= -1.4V (forced)
Current Limit
(Note 2)
I
CL
V
DIFF
≤ 5V
V
DIFF
= 40V, T
A
= 25°C
Min.
-1.275
Max.
-1.225
-1.20
-1.225
-1.20
9
23
25
25
25
25
5
mV
mV
mV
V
Unit
•
•
•
•
-1.30
-1.275
-1.30
-9
-23
-25
-25
-25
•
-25
-5
•
•
•
•
•
•
•
•
•
66
dB
100
100
-5
-5
5
5
3.0
3.0
5.0
1.5
0.24
3.5
1.2
A
mA
µA
µA
µA
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. If not tested, shall be guaranteed to the specified limits.
3. The
•
denotes the specifications which apply over the full operating temperature range.
PART NUMBER DESIGNATOR
Standard Military Drawing Number
Omnirel Part Number
OM1322SMM
OM1322STM
OM1322NTM
OM1322 NKM
OM1322NMM
OM1322N2M
Omnirel Package Designation
SMD-3
TO-257 (Isolated)
TO-257 (non-Isolated)
TO-3
SMD-1
LCC-20
3.5
7703403M
7703403U
7703403T
7703403Y
7703403N
77034032
3.5 - 10
OM1322NTM, OM1322STM, OM1322NKM, OM1322SMM, OM1322NMM, OM1322N2M
ELECTRICAL CHARACTERISTICS
OM1322N2M
Parameter
Reference Voltage
Symbol
V
REF
-55°C ≤ T
A
≤ 125°C, I
L
= 8mA (unless otherwise specified)
Test Conditions
V
DIFF
= 3.0V, T
A
= 25°C
V
DIFF
= 3.0V
V
DIFF
= 40V, T
A
= 25°C
V
DIFF
= 40V
Min.
-1.275
Max.
-1.225
-1.20
-1.225
-1.20
9
23
25
25
25
25
5
Unit
•
•
•
•
-1.30
-1.275
-1.30
-9
-23
-25
-25
-25
V
Line Regulation
(Note 1)
Load Regulation
(Note 1)
R
LINE
3.0 V ≤
V
DIFF
≤ 40V, T
A
= 25°C
3.0 V ≤
V
DIFF
≤ 40V
V
DIFF
= 5.0V, 8mA ≤ I
L
≤ 200mA
V
DIFF
= 15V, 8mA ≤ I
L
≤ 200mA, T
A
= 25°C
V
DIFF
= 40V, 8mA ≤ I
L
≤ 150mA, T
A
= 25°C
V
DIFF
= 40V, 8mA ≤ I
L
≤ 50mA
mV
R
LOAD
mV
•
-25
-5
Thermal Regulation
V
RTH
V
in
= -16.25V, I
L
= 330mA
P
d
= 5 Watts, t = 10 ms, T
A
= 25°C
mV
Ripple Rejection
(Note 2)
Adjustment Pin Current
R
N
f = 120 Hz, V
out
= V
ref
C
Adj
= 10 µF
V
DIFF
= 3.0V
V
DIFF
= 40V
3.0V ≤
V
DIFF
≤ 40V
V
DIFF
= 5V, 8mA ≤ I
L
≤ 500 mA
V
DIFF
= 3.0V, V
out
= -1.4V (forced)
V
DIFF
= 10V, V
out
= -1.4V (forced)
V
DIFF
= 40V, V
out
= -1.4V (forced)
V
DIFF
≤ 5V
V
DIFF
= 40V, T
A
= 25°C
•
•
•
•
•
•
•
•
•
66
dB
I
Adj
100
100
-5
-5
5
5
3.0
3.0
5.0
0.5
0.15
1.8
0.65
A
mA
µA
µA
µA
Adjustment Pin
Current Change
Miminum Load Current
∆I
Adj
(Line)
∆I
Adj
(Load)
I
Lmin
Current Limit
(Note 2)
I
CL
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. If not tested, shall be guaranteed to the specified limits.
3. The
•
denotes the specifications which apply over the full operating temperature range.
I
PROG
+
C
IN
*
1.0µF
R
2
R
1
120Ω
C
O
**
+
1.0µF
* C
in
is required if regulator is located more than
4 inches from power supply filter. A 1 µF solid
tantalum or 10 µF aluminum electrolytic is
recommended.
** C
o
is necessary for stability. A 1 µF solid
tantalum or 10 µF aluminum electrolytic is
recommended.
3.5
I
Adj
V
IN
-V
IN
OM1322STM
V
OUT
-V
OUT
V
out
= -1.25 V (1 +R
2
)
R
1
3.5 - 11
Microcontroller MCU
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