OM1850NKM OM1850STM
OM1850NMM
3 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-88646
Three Terminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic Packages
See Mechanical Outline
FEATURES
•
•
•
•
•
•
•
Similar To Industry Standard LT1085
Approved To DESC Standardized Military Drawing Number 5962-88646
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
DESCRIPTION
This three terminal positive adjustable voltage regulator is designed to provide 3.0A with
higher efficiency than conventional voltage regulators. This device is designed to
operate to 1 Volt input to output differential and the dropout voltage is specified as a
function of load current. Supplied in easy-to-use hermetic TO-257, SMD-1 or 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 (P
d
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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:
θ
JC
(SMD-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W
θ
JA
(SMD-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W
θ
JC
(TO-257) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
θ
JA
(TO-257). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
θ
JC
(TO-3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W
θ
JA
(TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 A
Recommended Operating Conditions:
Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 15 V
Ambient Operating Temperature Range (T
A
). . . . . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V
a
1 08 R4
Supersedes 0 03 R3
3.3 - 79
3.3
OM1850STM OM1850NMM OM1850NKM
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
Symbol
V
REF
-55°C
≤
T
A
≤
125°C (unless otherwise specified)
Min.
1.238
Max.
1.262
Unit
V
Test Conditions
V
IN
- V
OUT
= 3.0 V, T
A
= 25° C
I
OUT
= 10 mA
1.5 V
≤ V
IN
- V
OUT
≤
25 V,
10 mA
≤
I
OUT
≤
2.0 A
•
1.220
1.270
V
Line Regulation
(Note 1)
∆V
OUT
∆V
IN
1.5 V
≤ V
IN
- V
OUT
≤
15 V,
I
OUT
= 10 mA, T
A
= 25° C
15 V
≤ V
IN
- V
OUT
≤
35 V,
I
OUT
= 10 mA
0.2
%
•
0.5
%
Load Regulation
(Note 1)
∆V
OUT
∆I
OUT
V
IN
- V
OUT
= 3.0 V, T
A
= 25° C
10 mA
≤
I
OUT
≤
2.0 A
I
OUT
= 2.0 A,
∆V
REF
= 1%
30 ms pulse, T
A
= +25° C
f = 120 Hz, C
Adj
= 25 µF,
C
OUT
= 25 µF (tantalum), I
OUT
= 2.0 A,
V
IN
- V
OUT
= 3.0 V
1.5 V
≤ V
IN
- V
OUT
≤
25 V,
10 mA
≤
I
OUT
≤
2.0 A
1.5 V
≤ V
IN
- V
OUT
≤
25 V,
10 mA
≤
I
OUT
≤
2.0 A
V
IN
- V
OUT
= 24 V
V
IN
- V
OUT
≤
5.0 V
V
IN
- V
OUT
= 25 V
-55° C
≤
T
J
≤
+125° C
0.8
%
Dropout Voltage
Thermal Regulation
Ripple Rejection
V
DO
-
∆V
IN
∆V
OUT
•
•
•
60
1.0
1.5
0.02
%
V
%/W
dB
Adjust Pin Current
I
Adj
∆I
Adj
•
•
•
•
•
•
120
µA
Adjust Pin Current Change
5.0
µA
Miminum Load Current
Current Limit
I
Min
I
Lim
∆V
OUT
∆T
∆V
OUT
∆T
10
3.2
0.2
1.5
mA
A
A
%
Temperature Stability
(Note 2)
Long Term Stability
(Note 2)
Notes:
T
A
= +125° C, t = 1000 hrs
1.0
%
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 30 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.
3.3
SMD #
5962-8864601U
5962-8864601N
5962-8864601X
Part Number Designator
Omnirel
OM1850STM
OM1850NMM
OM1850NKM
Part Numbering System
Voltage Regulators
Package
TO-257 (Isolated)
SMD-1 (Non-Isolated)
TO-3
* Package Codes:
OM-1850-S-T-M
Company
Identification
Part
Number
K= TO-204AA (TO-3)
M= SMD-1
T= TO-257AA
Screening
M= MIL-M 38535
Package
(see Package codes*)
S= Isolated
N= Non isolated
3.3 - 80
OM1850STM OM1850NMM OM1850NKM
TYPICAL PERFORMANCE CHARACTERISTICS
LOAD REGULATION
0.10
I=3A
∆I
=3∆
6
5
SHORT CIRCUIT CURRENT
OUTPUT VOLTAGE DEVIATION (%)
0.05
0
-0.05
-0.10
-0.15
-0.20
-50
SHORT CIRCUIT CURRENT (A)
4
25°C
3
2
1
0
-55°C
I
FULL LOAD
150°C
-25
0
25
50
75
100 125 150
0
5
10
15
20
25
30
35
TEMPERATURE (°C)
INPUT/OUTPUT DIFFERENTIAL (V)
100
90
ADJUSTMENT PIN CURRENT
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
2
DROPOUT VOLTAGE
• INDICATES GUARANTEED TEST POINT
-55°C
j
j
150°C
55°C
≤
T
T
≤
150°C
T
125°C
0°C
≤
T
j
j
≤
125°C
ADJUSTMENT PIN CURRENT (µA)
80
70
60
50
40
30
20
10
0
-50
-25
0
25
50
75
100
125
150
TEMERATURE (°C)
1
T
j
= 25°C
T
j
= 150°C
T
j
= -55°C
0
0
1
2
3
4
OUTPUT CURRENT (A)
TEMPERATURE STABILITY
1.270
MINIMUM OPERATING CURRENT
10
MINIMUM OPERATING CURRENT (mA)
9
8
7
6
5
4
3
2
1
0
0
5
10
T
j
= -55°C
15
20
25
30
35
T
j
= 25°C
T
j
= 150°C
3.3
REFERENCE VOLTAGE (V)
1.260
1.250
1.240
1.230
-50
-25
0
25
50
75
100 125 150
TEMPERATURE (°C)
INPUT/OUTPUT DIFFERENTIAL (V)
3.3 - 81
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