OMNIREL OM1850STM, OM1850NKM, OM1850NMM Datasheet
3.3 - 79
3.3
OM1850NKM
Three Terminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic Packages
1 08 R4
Supersedes 0 03 R3
3 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-88646
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 (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(SMD-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W
θJA(SMD-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W
θJC(TO-257) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
θJA(TO-257). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
θJC(TO-3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W
θJA(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 (TA). . . . . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V
a
OM1850STM
OM1850NMM
See Mechanical Outline
3.3 - 80
3.3
OM1850STM OM1850NMM OM1850NKM
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, TA= 25° C 1.238 1.262 V
I
OUT
= 10 mA
1.5 V ≤V
IN
- V
OUT
≤25 V, • 1.220 1.270 V
10 mA ≤ I
OUT
≤ 2.0 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 0.8 %
(Note 1) ∆I
OUT
10 mA ≤ I
OUT
≤ 2.0 A
• 1.0 %
Dropout Voltage V
DO
I
OUT
= 2.0 A, ∆V
REF
= 1% • 1.5 V
Thermal Regulation - 30 ms pulse, T
A
= +25° C 0.02 %/W
Ripple Rejection ∆V
IN
f = 120 Hz, C
Adj
= 25 µF, • 60 dB
∆V
OUT
C
OUT
= 25 µF (tantalum), I
OUT
= 2.0 A,
V
IN
- V
OUT
= 3.0 V
Adjust Pin Current I
Adj
1.5 V ≤VIN- V
OUT
≤25 V, • 120 µA
10 mA ≤ I
OUT
≤ 2.0 A
Adjust Pin Current Change ∆I
Adj
1.5 V ≤VIN- V
OUT
≤25 V, • 5.0 µA
10 mA ≤ I
OUT
≤ 2.0 A
Miminum Load Current I
Min
VIN- V
OUT
= 24 V • 10 mA
Current Limit I
Lim
VIN- V
OUT
≤5.0 V • 3.2 A
V
IN
- V
OUT
= 25 V
• 0.2 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 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.
Part Number Designator
SMD # Omnirel Package
5962-8864601U OM1850STM TO-257 (Isolated)
5962-8864601N OM1850NMM SMD-1 (Non-Isolated)
5962-8864601X OM1850NKM TO-3
Part Numbering System
Voltage Regulators
OM-1850-S-T-M
Company
Identification
Part
Number
S= Isolated
N= Non isolated
Package
(see Package codes*)
Screening
M= MIL-M 38535
* Package Codes:
K= TO-204AA (TO-3)
M= SMD-1
T= TO-257AA
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