OM1327SMM OM1327NMM
OM1327NKM OM1327NTM
OM1327STM
OM1327N2M
1.5 AMP NEGATIVE ADJUSTABLE VOLTAGE
REGULATOR APPROVED TO DESC DRAWING 7703408
Three Terminal, Precision Adjustable
Negative Voltage Regulator In Hermetic
Style Packages (LM137AHV)
Please see mechanical
outlines herein
FEATURES
•
•
•
•
•
•
Similar To Industry Standard LM137AHV
Approved To DESC Standardized Military Drawing Number 7703408
Built In Thermal Overload Protection
Short Circuit Current Limiting
Available In Six Package Styles
Maximum Output Voltage Tolerance Is Guaranteed to + 1%
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 -47
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 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 -47 VDC
Ambient Operating Temperature Range (T
A
). . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.25 to -51.25 VDC
4 11 R2
Supersedes 1 07 R1
3.5
3.5 - 29
OM1327NTM, OM1327STM, OM1327NKM, OM1327SMM, OM1327NMM, OM1327N2M
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
Symbol
V
REF
-55°C ≤ T
A
≤ 125°C, I
L
= 8mA (unless otherwise specified)
OM1327NTM, OM1327STM, OM1327NKM, OM1327SMM, OM1327NMM
Test Conditions
V
DIFF
= 3.0V, T
A
= 25°C
V
DIFF
= 3.0V
V
DIFF
= 50V, T
A
= 25°C
V
DIFF
= 50V
Line Regulation
(Note 1)
Load Regulation
(Note 1)
R
LOAD
V
DIFF
50V, 8mA ≤ I
L
≤ 110mA, T
A
= 25°C
V
DIFF
= 5V, 8mA ≤ I
L
≤ 1.5A, T
A
= 25°C
R
LINE
3.0 V ≤
V
DIFF
≤ 50V, T
A
= 25°C
Min.
-1.262
Max.
-1.238
-1.22
-1.22
-1.22
6
20
25
25
50
5
mV
mV
mV
V
Unit
•
•
•
-1.28
-1.28
-1.28
-6
-20
-25
-25
•
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
V
DIFF
= 50V
Adjustment Pin
Current Change
Miminum Load Current
I
Lmin
∆I
Adj
V
DIFF
= 5V, 8mA ≤ I
out
≤ 1.5A
3V ≤
V
DIFF
≤ 50V, I
L
≤ 8mA
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
= 50V, V
out
= -1.4V (forced)
Current Limit
(Note 2)
I
CL
V
DIFF
= 5V
V
DIFF
= 50V, T
A
= 25°C
-50
-5
•
•
•
•
•
•
•
•
•
•
•
66
dB
100
100
100
-5
-6
5
6
3.0
3.0
5.0
5.0
1.5
0.2
3.5
1.0
A
mA
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
7703408M
7703408U
7703408T
7703408Y
7703408N
77034082
Omnirel Part Number
OM1327SMM
OM1327STM
OM1327NTM
OM1327NKM
OM1327NMM
OM1327N2M
Omnirel Package Designation
SMD-3
TO-257 (Isolated)
TO-257 (non-Isolated)
TO-3
SMD-1
LCC-20
3.5
3.5 - 30
OM1327NTM, OM1327STM, OM1327NKM, OM1327SMM, OM1327NMM, OM1327N2M
ELECTRICAL CHARACTERISTICS
OM1327N2M
Parameter
Reference Voltage
Symbol
V
REF
-55°C ≤ T
A
≤ 125°C, I
L
= 8mA (unless otherwise specified)
Min.
-1.262
Max.
-1.235
-1.22
-1.22
-1.22
-1.22
-1.22
10
25
25
31
50
2
mV
mV
mV
V
Unit
Test Conditions
V
DIFF
= 3.0V, T
A
= 25°C
V
DIFF
= 3.0V
V
DIFF
= 40V, T
A
= 25°C
V
DIFF
= 40V
V
DIFF
= 50V, T
A
= 25°C
V
DIFF
= 50V
•
•
•
•
-1.28
-1.28
-1.28
-1.28
-1.28
-10
-25
-25
-31
Line Regulation
(Note 1)
Load Regulation
(Note 1)
R
LINE
3.0 V ≤
V
DIFF
≤ 50V, T
A
= 25°C
V
DIFF
50V, 8mA ≤ I
L
≤ 100 mA, T
A
= 25°C
V
DIFF
= 5V, 8mA ≤ I
L
≤ 500 mA, T
A
= 25°C
R
LOAD
•
Thermal Regulation
V
RTH
V
in
= -16.25V, I
L
= 330 mA
P
d
= 5 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
V
DIFF
= 50V
Adjustment Pin
Current Change
Miminum Load Current
I
Lmin
∆I
Adj
V
DIFF
= 5V, 8mA ≤ I
out
≤ 200 mA
3V ≤
V
DIFF
≤ 50V, I
L
≤ 8mA
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
= 50V, V
out
= -1.4V (forced)
Current Limit
(Note 2)
I
CL
V
DIFF
= 5V
V
DIFF
= 50V, T
A
= 25°C
-50
-2
•
•
•
•
•
•
•
•
•
•
•
66
dB
100
100
100
-5
-6
5
6
3.0
3.0
5.0
5.0
0.5
0.1
1.8
0.65
A
mA
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.
TYPICAL APPLICATION
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
OM1327STM
V
OUT
-V
OUT
V
out
= -1.25 V (1 +R
2
)
R
1
3.5 - 31
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