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 (TA) . . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V
OM1860STM
OM1860NHM
3.3 - 84
3.3
OM1860STM OM1860NKM OM1860NHM
ELECTRICAL CHARACTERISTICS -55°C ≤TA≤125°C (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage VREF VIN - VOUT = 3.0 V, TA= 25° C 1.238 1.262 V
IOUT = 10 mA
1.5 V ≤VIN - VOUT ≤25 V, •1.220 1.270 V
10 mA ≤IOUT ≤1.0 A
Line Regulation ∆VOUT 1.5 V ≤VIN - VOUT ≤15 V, 0.2 %
(Note 1) ∆VIN IOUT = 10 mA, TA= 25° C
15 V ≤VIN - VOUT ≤35 V, •0.5 %
IOUT = 10 mA
Load Regulation ∆VOUT VIN - VOUT = 3.0 V, TA= 25° C 0.8 %
(Note 1) ∆IOUT 10 mA ≤IOUT ≤1.0 A
•1.0 %
Dropout Voltage VDO IOUT = 1.0 A, ∆VREF = 1% •1.5 V
Thermal Regulation - 30 ms pulse, TA= +25° C 0.04 %/W
Ripple Rejection ∆VIN f = 120 Hz, CAdj = 25 µF, •60 dB
∆VOUT COUT = 25 µF (tantalum), IOUT = 1.0 A,
VIN - VOUT = 3.0 V
Adjust Pin Current IAdj 1.5 V ≤VIN - VOUT ≤25 V, •120 µA
10 mA ≤IOUT ≤1.0 A
Adjust Pin Current Change ∆IAdj 1.5 V ≤VIN - VOUT ≤25 V, •5.0 µA
10 mA ≤IOUT ≤1.0 A
Miminum Load Current IMin VIN - VOUT = 25 V •10 mA
Current Limit ILim VIN - VOUT ≤5.0 V •1.5 2.5 A
VIN - VOUT = 25 V •0.075 A
Temperature Stability ∆VOUT -55° C ≤TJ≤+125° C •1.5 %
(Note 2) ∆T
Long Term Stability ∆VOUT 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
3.3 - 85
OM1860STM OM1860NKM OM1860NHM
VRIPPLE ≤3Vp-p
VRIPPLE ≤0.5Vp-p
3.3
OM1860STM OM1860NKM OM1860NHM
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
+
1.2V - 15V Adjustable Regulator 5V Regulator with Shutdown
TYPICAL APPLICATIONS
ΩΩ
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 VOUT
.430
.410
.200
.190
.038 MAX.
.005
.120 TYP.
.537
.527
.665
.645
.420
.410
.150
.140
.750
.500
.100 TYP.
.035
.025
.045
.035
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