OMNIREL OM1840SCM, OM1840NKM, OM1840NCM Datasheet
3.3 - 75
3.3
OM1840NKM
1 08 R3
Supersedes 4 11 R2
5 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-89521
FEATURES
• Similar To Industry Standard LT1084
• Approved To DESC Standardized Military Drawing Number 5962-89521
• Adjustable Output Voltage
• Built In Thermal Overload Protection
• Short Circuit Current Limiting
• Maximum Output Voltage Tolerance is Guaranteed To ±1%
• Guaranteed Dropout Voltage At Multiple Current Levels
• TO-258 Available in Isolated and Non-Isolated Packages
DESCRIPTION
This three terminal positive adjustable voltage regulator is designed to provide 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 and
TO-3 packages, 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:
θJC(TO-258 Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W
θJC(TO-258 Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3°C/W
θJC(TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 A
Recommended Operating Conditions:
Output Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 15 V
Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V
OM1840SCM
OM1840NCM
Three Terminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic Packages
3.3 - 76
3.3
OM1840SCM OM1840NCM OM1840NKM
ELECTRICAL CHARACTERISTICS -55°C ≤ T
A
≤ +125°C (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
REF
VIN- V
OUT
= 3.0 V, 1.238 1.262 V
I
OUT
= 10 mA, TA= 25° C
1.5 V ≤V
IN
- V
OUT
≤25 V, • 1.225 1.270 V
I
OUT
= 10 mA, IFL= 3.0 A
Line Regulation ∆V
OUT
1.5 V ≤VIN- V
OUT
≤15 V, 0.2 %
(Note 1) ∆V
IN
I
OUT
= 10 mA, TA= 25° C
15 V ≤V
IN
- V
OUT
≤35 V, • 0.5 %
I
OUT
= 10 mA
Load Regulation ∆V
OUT
VIN- V
OUT
= 3.0 V, TA= 25° C 0.3 %
(Note 1) ∆I
OUT
I
OUT
= 10 mA, IFL= 3.0 A
• 0.4 %
Dropout Voltage V
DO
IFL= 3.0 A, ∆V
REF
= 1% • 1.5 V
Thermal Regulation - 30 ms pulse, T
A
= +25° C 0.015 %/W
Ripple Rejection ∆V
IN
f = 120 Hz, C
Adj
= 25 µF, • 60 dB
∆V
OUT
C
OUT
= 25 µF (tantalum), IFL= 3.0 A,
V
IN
- V
OUT
= 3.0 V
Adjust Pin Current I
Adj
1.5 V ≤VIN- V
OUT
≤25 V, • 120 µA
I
OUT
= 10 mA, IFL= 3.0 A
Adjust Pin Current Change ∆I
Adj
1.5 V ≤VIN- V
OUT
≤25 V, • 5.0 µA
10 mA ≤ I
OUT
≤ 3.0 A
Miminum Load Current I
Min
VIN- V
OUT
= 25 V • 10 mA
Current Limit I
Lim
VIN- V
OUT
≤5.0 V • 5.5 A
V
IN
- V
OUT
= 25 V • 0.3 A
Temperature Stability ∆V
OUT
-55° C ≤ TJ≤ +125° C • 1.5 %
(Note 2) ∆T
Long Term Stability ∆V
OUT
TA= +125° C, t = 1000 hrs 1.0 %
(Note 2) ∆T
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 45 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
8952101Y OM1840SCM
8952101Z OM1840NCM
8952101X OM1840NKM
“Y” = Isolated
“Z” = Non-Isolated
Part Numbering System
Voltage R egula tors
OM - 1840 -
S - C - M
Company
Identification
Part
Number
S= Isolated
N= N on
isola ted
Package
(see Package codes*)
Screening
M= MIL-M
3853 5
* Package Codes:
K= TO-204AA (TO-3)
Z= TO-259AA (Z-Tab)
C = TO-258AA
isola
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