OM1830SCM
OM1830NCM
7.5 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-89520
Three T erminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic JEDEC TO-258AA Package
FEATURES
• Similar To Industry Standard LT1083
• Approved To DESC Standardized Military Drawing Number 5962-8952001Y
• Adjustable Output Voltage
• Built In Thermal Overload Protection
• Short Circuit Current Limiting
• Available In Isolated Package
• Maximum Output Voltage Tolerance is Guaranteed To ±1%
• Guaranteed Dropout Voltage At Multiple Current Levels
• Product Also Available in Non-Isolated Package
DESCRIPTION
This three terminal positive adjustable voltage regulator is designed to provide 7.5A
with higher efficiency than conventional voltage regulators. This device is designed
to operate down to 1 volt input to output differential and the dropout voltage is fully
specified as a function of load current. Supplied in easy-to-use hermetic TO-258
package, this device is ideally suited for Military applications where small size and
high reliability is required.
ABSOLUTE MAXIMUM RATINGS @ 25°C
Power Dissipation (Pd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 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:
qJC(Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.75°C/W
qJC(Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 A
3.3
4 11 R1
Supersedes 1 06 R0
3.3 - 69
OM1830SCM OM1830NCM
ELECTRICAL CHARACTERISTICS -55°C T
+125°C (unless otherwise specified)
A
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
Line Regulation ³V
(Note 1) ³V
Load Regulation ³V
(Note 1) ³I
REF
OUT
IN
OUT
OUT
VIN- V
I
= 10 mA, TA= 25° C
OUT
1.5 V V
10 mA I
1.5 V VIN- V
I
= 10 mA, TA= 25° C
OUT
15 V V
I
OUT
VIN- V
OUT
10 mA I
Œ= 3.0 V, 1.238 1.262 V
OUT
- V
Œ 25 V, • 1.225 1.270 V
IN
OUT
5.0 A
OUT
Π15 V, 0.2 %
OUT
- V
Œ 35 V, • 0.5 %
IN
OUT
= 10 mA
Œ= 3.0 V, TA= 25° C 0.3 %
5.0 A
OUT
• 0.4 %
Dropout Voltage V
DO
Thermal Regulation - 30 ms pulse, T
Ripple Rejection ³V
Adjust Pin Current I
Adjust Pin Current Change ³I
Miminum Load Current I
Current Limit I
Temperature Stability ³V
IN
³V
OUT
Adj
Adj
Min
Lim
OUT
(Note 2) ³T
Long Term Stability ³V
OUT
(Note 2) ³T
I
= IFL, IFL= 5.0 A, ³V
OUT
f = 120 Hz, C
C
= 25 µF (tantalum), IFL= 5.0 A,
OUT
V
- V
Œ= 3.0 V, I
IN
OUT
1.5 V VIN- V
10 mA I
OUT
1.5 V VIN- V
10 mA I
OUT
VIN- V
OUT
VIN- V
OUT
V
- V
IN
OUT
= 1% • 1.5 V
REF
= +25° C 0.01 %/W
A
= 25 µF, • 60 dB
Adj
= I
OUT
FL
Œ 25 V • 120 µA
OUT
5.0 A
Œ 25 V • 5.0 µA
OUT
5.0 A
Œ= 25 V • 10 mA
Œ= 5.0 V • 8.0 A
Œ= 25 V • 0.4 A
-55° C TJ +125° C • 1.5 %
TA= +125° C, t = 1000 hrs 1.0 %
3.3
Notes:
1. Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique.
Although power dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 60 W.
Power dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum
power dissipation will not be available over the full input/output voltage range.
2. Guaranteed by design, characterization or correlation to other tested parameters.
3. The • denotes the specifications which apply over the full operating temperature range.
PART NUMBER DESIGNATOR
Standard Military Drawing Number Omnirel Part Number
8952001Y OM1830SCM
8952001Z OM1830NCM
“Y” = Isolated
3.3 - 70
OM1830SCM OM1830NCM
LOAD REGULATION
TEMPERATURE (°C)
150-25 25 50 75 125
-0.20
-0.15
-0.10
0
0.05
0.10
-0.05
0 100
OUTPUT VOLTAGE DEVIATION (%)
-50
∆I= 7.5A
SHORT CIRCUIT CURRENT
INPUT/OUTPUT DIFFERENTIAL (V)
SHORT CIRCUIT CURRENT (A)
0
0 5 10 15 20 25 30 35
2
4
8
10
12
25°C
6
FULL LOADI
DROPOUT VOLTAGE
OUTPUT CURRENT (A)
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
Tj= -55°C
T
T
j
2
1
0
01234 5 10
ADJUSTMENT PIN CURRENT
TEMERATURE (°C)
ADJUSTMENT PIN CURRENT (µA)
0
20
40
60
90
100
80
70
50
30
10
150-50 -25 50 75 12525 1000
TEMPERATURE STABILITY
REFERENCE VOLTAGE (V)
1.230
-50
TEMPERATURE (°C)
150
1.270
1.240
1.250
1.260
-25 0 25 50 75 100 125
MINIMUM OPERATING CURRENT
INPUT/OUTPUT DIFFERENTIAL (V)
Tj= 25°C
30
MINIMUM OPERATING CURRENT
0 5 10 15 20 25
0
2
4
6
8
Tj= 150°C
Tj= -55°C
• INDICATES GUARANTEED TEST POINT
35
9
10
7
5
3
1
6789
0°C
j
125°C
T
j
= 25°C
= 150°C
150°C
-55°C
j
150°C
T-40°C
TYPICAL PERFORMANCE CHARACTERISTICS
3.3
3.3 - 71
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM1830SCM OM1830NCM
.707
.697
.750
.500
.835
.815
.695
.685
.165
.155
.200 TYP.
.550
.530
.270
.240
.045
.035
.140 TYP.
.092 MAX.
.065
.055
.005
V OUT
IN OUT
ADJ
ADJ
IN
VOUT
IOUT
IN
=1.25 )
1+ R2
__
R1
(
2 FEET #18 WIRE*
* THE #18 WIRE ACTS
AS BALLAST RESISTENCE
INSURING CURRENT SHARING
BETWEEN BOTH DEVICES.
= OA TO 15A
R1
120
R2
0.015
OUT
ADJ
IN
10µF
VV
R1
1211%
IN
V
IN
V 16.5V
150µF
C1
10µF*
R2
365
1%
+
+
C
*C1 IMPROVES RIPPLE
REJECTION. X
SHOULD BE
R1 AT RIPPLE FREQUENCY.
~
~
OUT
ADJ
IN
V
IN
V
+
TTL
2N3904
1k
1k
365
1%
121
1%
5V
V
10µF
+
100µF
OUT
ADJ
IN
VV
R1
121
V
C2
100µF
R2
5k
+
*NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
†
OUT
VOUT=1.25V )
R2
(
†
+
1
__
R1
C1
10µF
+
TYPICAL APPLICATIONS
Parelleling Regulators Improving Ripple Rejection
1.2V - 15V Adjustable Regulator 5V Regulator with Shutdown
TYPICAL APPLICATIONS
OM183
OM183
OM183
0.015
OM183
OM183
V
16.5V
OUT
MECHANICAL OUTLINE
3.3
NOTES
• Case is metal/hermetically sealed
• Isolated Tab
CONNECTION DIAGRAM
123
PIN OUT
1 Adjust
2V
3V
OUT
IN
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