Page 1
3.3 - 83
3.3
OM1860NKM
Three Terminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic Packages
1 08 R3
Supersedes 4 11 R2
1.5 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-89981
FEATURES
• Similar To Industry Standard LT1086
• Approved To DESC Standardized Military Drawing Number 5962-89981
• 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-257 Available in Isolated and Non-Isolated Packages
DESCRIPTION
This three terminal positive adjustable voltage regulator is designed to provide 1.5A
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, TO-3 and
TO-39 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-257, Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
θJA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
θJC(TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W
θJA(TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35°C/W
θJC(TO-39) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C/W
θJA(TO-39) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140°C/W
Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 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
OM1860STM
OM1860NHM
Page 2
3.3 - 84
3.3
OM1860STM OM1860NKM OM1860NHM
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
≤ 1.0 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
≤ 1.0 A
• 1.0 %
Dropout Voltage V
DO
I
OUT
= 1.0 A, ∆V
REF
= 1% • 1.5 V
Thermal Regulation - 30 ms pulse, T
A
= +25° C 0.04 %/W
Ripple Rejection ∆V
IN
f = 120 Hz, C
Adj
= 25 µF, • 60 dB
∆V
OUT
C
OUT
= 25 µF (tantalum), I
OUT
= 1.0 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
≤ 1.0 A
Adjust Pin Current Change ∆I
Adj
1.5 V ≤VIN- V
OUT
≤25 V, • 5.0 µA
10 mA ≤ I
OUT
≤ 1.0 A
Miminum Load Current I
Min
VIN- V
OUT
= 25 V • 10 mA
Current Limit I
Lim
VIN- V
OUT
≤5.0 V • 1.5 2.5 A
V
IN
- V
OUT
= 25 V • 0.075 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 15 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 Package
5962-8998101Y OM1860NHM TO-39
5962-8998101X OM1860NKM TO-3
5962-8998101U OM1860STM TO-257 (Isolated)
Part Numbering System
Voltage Regulators
OM-1860-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)
H= TO-39
T= TO-257AA
Page 3
3.3 - 85
OM1860STM OM1860NKM OM1860NHM
SHORT CIRCUIT CURRENT
INPUT/OUTPUT DIFFERENTIAL (V)
Tj= -55°C
30
SHORT CIRCUIT CURRENT (A)
0 5 10 15 20 25
0
0.5
1
1.5
2
2.5
Tj= 25°C
GUARANTEED
OUTPUT CURRENT
Tj= 150°C
TEMPERATURE STABILITY
TEMPERATURE (°C)
150
OUTPUT VOLTAGE CHANGE (%)
-50 -25 0 50 75 125
-2.0
0
1.0
2.0
-1.0
25 100
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
RIPPLE REJECTION VS. CURRENT
OUTPUT CURRENT (A)
1.5
RIPPLE REJECTION (dB)
0 0.25 0.5 0.75 1 1.25
0
20
40
60
80
100
fR=20kHz
V
RIPPLE
3Vp-p
fR= 120Hz
C
OUT
=25µF
V
RIPPLE
0.5Vp-p
C
ADJ
=25µF
V
OUT
=5V
MINIMUM OPERATING CURRENT
INPUT/OUTPUT DIFFERENTIAL (V)
Tj= 25°C
MINIMUM OPERATING CURRENT (mA)
Tj= 150°C
Tj= -55°C
LOAD REGULATION
TEMPERATURE (°C)
150-50 -25 25 50 75 125
-0.20
-0.15
-0.10
0
0.05
0.10
∆I= 1.5A
-0.05
0 100
OUTPUT VOLTAGE DEVIATION (%)
300 5 10 15 20 25
7
10
9
8
6
5
4
3
2
1
0
35
90
70
50
30
10
V
RIPPLE
≤ 3Vp-p
V
RIPPLE
≤ 0.5Vp-p
Page 4
3.3
OM1860STM OM1860NKM OM1860NHM
TYPICAL APPLICATIONS
Ω
Ω
Ω
OM1860
OM1860
1.197
1.177
0.675
0.655
0.188 R.
MAX.
0.440
0.420
0.161
0.151
0.525 R.
MAX.
0.225
0.205
SEATING
PLANE
0.312
MIN.
0.450
0.250
0.043
0.038
2 PLCS.
0.135
MAX.
0.875
MAX.
1.53
REF.
MECHANICAL OUTLINE TO-3
OM1860NKM
PIN OUT
1 Adjust
2V
IN
Case V
OUT
MECHANICAL OUTLINE
OM1860STM
NOTES
• Case is metal/hermetically sealed
• Isolated Tab
4
123
PIN OUT
1 Adjust
2V
OUT
3V
IN
4 Isolated
MECHANICAL OUTLINE TO-39
OM1860NHM TO-39
Pin 1 Adjust
Pin 2 Input
Case Output
1.2V - 15V Adjustable Regulator 5V Regulator with Shutdown
VV
IN
C1
10µF
.420
.410
ADJ
R2
__
+
1
(
R1
+
*NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
†
VOUT =1.25V )
.150
.140
†
V
+
.430
.410
OUT
C2
100µF
.200
.190
.045
.035
.038 MAX.
.005
R2
5k
.537
.527
.750
.500
OUT
R1
121
.665
.645
V
V
TTL
IN
IN
ADJ
+
10µF
2N3904
1k
1k
121
1%
365
1%
5V
+
100µF
OUT
V
.035
.025
.100 TYP.
.120 TYP.
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