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OM183-5, 12, 15SC OM185-5, 12, 15ST OM184-5, 12, 15SC OM186-5, 12, 15ST
7.5A, 5A, 3A, 1.5A LOW DROPOUT FIXED VOLTAGE POSITIVE REGULATORS
Three Terminal +5V, +12V, +15V, Low Dropout TO-257/TO-258 Fixed Voltage Regulators
FEATURES
* * * * * +5V, +12V, and +15V Output Voltage Operates Down to 1V Dropout .015% Line Regulation / .01% Load Regulation Output Voltage Trimmed to 1% Hermetic TO-257 and TO-258 Isolated Package
DESCRIPTION
These three terminal positive fixed voltage regulators are designed to provide 7.5A, 5A, 3A, and 1.5A with higher efficiency than conventional voltage regulators. The devices are designed to operate to 1 Volt input to output differential and the dropout voltage is specified as a function of load current. All devices are pin compatible with older three terminal regulators. Supplied in the easy-to-use hermetic metal TO-257 and TO-258 JEDEC packages, these devices are ideally suited for Military applications where small size, hermeticity and high reliability are required.
ABSOLUTE MAXIMUM RATINGS
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C Output Current -OM183-5, 12, 15SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 A OM184-5, 12, 15SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 A OM185-5, 12, 15ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 A OM186-5, 12, 15ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
3.3
Note: OM183SC and OM184SC products are packaged in the TO-258 Package (7.5A & 5A). OM185ST and OM186ST products are packaged in the TO-257 Package (3A & 1.5A).
Part Number Designator OM183-5SC
Omnirel Output Output Package Current Voltage Type
4 11 R2 Supersedes 1 07 R1
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM183-5SC - OM186-15ST ELECTRICAL CHARACTERISTICS
Parameter Output Voltage OM183/4/5/6 - 5 V OM183/4/5/6 - 12 V OM183/4/5/6 - 15 V Line Regulation OM183/4/5/6 - 5 V Conditions IOUT = 0 mA, Tj = 25C, VIN = 8 V 0 IOUT IFULL LOAD, 6.5 V VIN 30 V IOUT = 0 mA, Tj = 25C, VIN = 15 V 0 IOUT IFULL LOAD, 13.5 V VIN 30 V IOUT = 0 mA, Tj = 25C, VIN = 20 V 0 IOUT IFULL LOAD, 17.5 V VIN 30 V IOUT = 0 mA, Tj = 25C, 6.5 V VIN 20 V 6.5 V VIN 30 V IOUT = 0 mA, Tj = 25C, 13.5 V VIN 25 V 13.5 V VIN 30 V IOUT = 0 mA, Tj = 25C, 17.5 V VIN 25 V 17.5 V VIN 30 V Load Regulation OM183/4/5/6 - 5 V OM183/4/5/6 - 12 V OM183/4/5/6 - 15 V Current Limit OM183 - 5 V OM183 - 12 V OM183 - 15 V OM184 - 5 V OM184 - 12 V OM184 - 15 V OM185 - 5 V OM185 - 12 V OM185 - 15 V OM186 - 5 V OM186 - 12 V OM186 - 15 V Dropout Voltage OM183/4/5/6 - 5 V OM183/4/5/6 - 12 V OM183/4/5/6 - 15 V Quiescent Current Thermal Regulation OM183 - 5/12/15 V OM184 - 5/12/15 V OM185 - 5/12/15 V OM186 - 5/12/15 V Ripple Rejection OM183/4/5/6 - 5 V OM183/4/5/6 - 12 V OM183/4/5/6 - 15 V Temperature Stability Long Term Stability RMS Output Noise (% of VOUT) Thermal Resistance TO-257AA TO-258AA VIN = 8 V, 0 IOUT IFULL LOAD, Tj = 25C VIN = 15 V, 0 IOUT IFULL LOAD, Tj = 25C VIN = 20 V, 0 IOUT IFULL LOAD, Tj = 25C VIN = 10 V VIN = 17 V VIN = 20 V VIN = 10 V VIN = 17 V VIN = 20 V VIN = 10 V VIN = 17 V VIN = 20 V VIN = 10 V VIN = 17 V VIN = 20 V VOUT = 50 mV, IOUT = IFULL LOAD VOUT = 120 mV, IOUT = IFULL LOAD VOUT = 180 mV, IOUT = IFULL LOAD VIN 30 V TA = 25C, 30 ms pulse 7.5 7.5 7.5 5.0 5.0 5.0 3.0 3.0 3.0 1.5 1.5 1.5
(TC = 25C unless otherwise noted)
Min. 4.95 4.90 11.88 11.76 14.85 14.70 Typ. 5.0 5.0 12.0 12.0 15.0 15.0 0.5 1.0 2.0 1.0 2.0 4.0 2.0 4.0 8.0 5 10 12 24 20 40 9.5 9.5 9.5 6.5 6.5 6.5 4.0 4.0 4.0 1.8 1.8 1.8 6.3 13.3 17.3 5.0 0.002 0.003 0.004 0.008 6.5 13.5 17.5 10.0 0.01 0.015 0.02 0.04 Max. 5.05 5.10 12.12 12.24 15.15 15.30 10 10 25 25 25 60 50 50 100 20 35 36 72 40 100 Units V V V V V V mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV A A A A A A A A A A A A V V V mA %/W %/W %/W %/W
OM183/4/5/6 - 12 V
OM183/4/5/6 - 15 V
3.3
f = 120 Hz, COUT = 25 F Tantalum IOUT = IFULL LOAD VIN = 8 V VIN = 15 V VIN = 20 V TA = 125C, 1000 Hrs. TA = 25C, 10 Hz f 10 kHz Junction-To-Case
63 55 60 0.5 0.03 0.003
1.0
dB dB dB % % % C/W C/W
3.5 2.75
3.3 - 67
OM183-5SC - OM186-15ST
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Input/Output Differential (V) OM183SC Dropout Voltage 2 Short Circuit Current (A) 12 10 8 6
TJ = -55C TJ = 25C TJ = 150C
OM183SC Short Circuit Current 0.10 Output Voltage Deviation (%) 0.05 0 -0.05 -0.10 -0.15
OM183SC Load Regulation
I = 7.5A
1
TJ = 25C
4 2 0 0 5
IFULL LOAD
0
0 1 2 3 4 5 6 7 8 9 10 Output Current (A)
10
15
20
25
30
35
Input/Output Differential (V) OM184SC Short Circuit Current 10 9 8 6 6 5 4 3 2 1 0
TJ = -55C
-0.20 -50 -25 0 25 50 75 100 125 150 Temperature (C) OM184SC Load Regulation 0.10 Output Voltage Deviation (%)
I = 5A
Minimum Input/Output Differential (V)
OM184SC Dropout Voltage 2 Short Circuit Current (A)
TJ = 150C TJ = 25C
0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 100 125 150 Temperature (C) OM185ST Load Regulation 0.10
1
TJ = 25C
IFULL LOAD
0
0
1
2
3
4
5
6
0
5
10
15
20
25
30
35
Output Current (A) OM185ST Dropout Voltage 2 Short Circuit Current (A) 6 5 4 3 2 1
Input/Output Differential (V) OM185ST Short Circuit Current Output Voltage Deviation (%)
Minimum Input/Output Differential (V)
I = 3A
TJ = 150C TJ = 25C
0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 100 125 150 Temperature (C) OM186ST Load Regulation
1
TJ = 25C
TJ = -55C
IFULL LOAD
0
0 0 1 2 3 4 0 5 10 15 20 25 30 35 Output Current (A) OM186ST Dropout Voltage Input/Output Differential (V) OM186ST Short Circuit Current 3.0 Short Circuit Current (A) 2.5 2.0 1.5 1 .5
IFULL LOAD TJ = -55C
3.3
Minimum Input/Output Differential (V) 2
0.10 Output Voltage Deviation (%)
I = 3A TJ = 150C TJ = 25C
0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 100 125 150 Temperature (C)
1
TJ = 25C
0
0
1 Output Current (A)
2
0 0 5 10 15 20 25 30 Input/Output Differential (V) 35
3.3 - 68
OM183-5SC - OM186-15ST
APPLICATION NOTES
This family of three terminal regulators is easy to use and has all the protection features that are expected in high performance voltage regulators. They are short circuit protected, have safe area protection as well as thermal shutdown to turn off the regulator should the temperature exceed about 165C. These regulators offer lower dropout voltage and more precise reference tolerance. Further, the reference stability with temperature is improved over older types of regulators. The only circuit difference between using this family and older regulators is that they require an output capacitor for stability. Overload Recovery When power is first turned on, as the input voltage rises, the output follows the input, allowing the regulator to start up into very heavy loads. During the start-up, as the input voltage is rising, the input-to-output voltage differential remains small, allowing the regulator to supply large output currents. With high input voltage, a problem can occur wherein removal of an output short will not allow the output voltage to recover. Older regulators, such as the 7800 series, also exhibited this phenomenon, so it is not unique to the OM183-5. The problem occurs with a heavy output load when the input voltage is high and the output voltage is low, such as immediately after a removal of a short. The load line for such a load may intersect the output current curve at two points. If this happens, there are two stable output operating points for the regulator. With this double intersection, the power supply may need to be cycled down to zero and brought up again to make the output recover. Thermal Conditions This series of regulators has internal power and thermal limiting circuitry designed to protect the device under overload conditions. For continuous normal load conditions however, maximum junction temperature ratings must not be exceeded. It is important to give careful consideration to all sources of thermal resistance from junction to ambient. This includes junction to case, case to heat sink interface, and heat sink resistance itself. New thermal resistance specifications have been developed to more accurately reflect device temperature and ensure safe operating temperatures. The data section for these new regulators provides a separate thermal resistance and maximum junction temperature for both the Control Section and the Power Transistor. Previous regulators, with a single junction to case thermal resistance specification, used an average of the two values provided here and therefore could allow excessive junction temperature under certain conditions of ambient temperature and heat sink resistance. To avoid this possibility, calculations should be made for both sections to ensure that both thermal limits are met. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. This is the lowest resistance path for heat flow. Proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. Thermal compound at the case-to-heat-sink interface is strongly recommended. If the case of the device must be electrically isolated, a thermally conductive spacer can be used, as long as its added contribution to thermal resistance is considered. Note that the case of all devices in this series is electrically connected to the output.
MECHANICAL SPECIFICATIONS P/N OM183SC and OM184SC JEDEC TO-258AA
MECHANICAL OUTLINE
.165 .155 .695 .685 .270 .240 .045 .035
PIN CONNECTION
.835 .815 .707 .697 .550 .530
1
.092 MAX. .750 .500 .065 .055 .140 TYP. .005
2
3
Pin 1 - Ground Pin 2 - VOUT Pin 3 - VIN
.200 TYP.
P/N OM185ST and OM186ST JEDEC TO-257AA
MECHANICAL OUTLINE
.420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX.
PIN CONNECTION
3.3
.150 .140
1
23
.750 .500
Pin 1 - Ground Pin 2 - VOUT Pin 3 - VIN
.005
.035 .025
.100 TYP.
.120 TYP.
3.3 - 69

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