OM183SC OM185ST OM185SR
OM184SC OM186ST OM186SR
7.5A, 5A, 3A, 1.5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS
Three Terminal Adjustable Low Dropout
TO-257/TO-258 Positive Voltage Regulators
FEATURES
•Operates Down to 1V Dropout, 1.5V @ Max. Current
•.015% Line Regulation
•.01% Load Regulation
•1% Reference Voltage
•Hermetic TO-257 and TO-258 Isolated Packages
•Electrically Equivalent to LT1083, 84, 85 and 86
DESCRIPTION
These three terminal positive adjustable 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 also supplied in Omnirel’s new surface mount D2 Pac.. These devices are ideally suited for Military applications where small size, hermeticity and high reliability are required.
ABSOLUTE MAXIMUM RATINGS @ 25°C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . 35 |
V |
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3.3 |
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Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . |
- 55°C to + 150°C |
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Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
- 65°C to + 150°C |
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Output Current - OM183SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . 7.5 |
A |
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OM184SC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . 5 |
A |
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OM185ST/SR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . 3 |
A |
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OM186ST/SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . 1.5 |
A |
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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).
0 03 R3 |
3.3 - 1 |
Supersedes 4 11 R2 |
OM183SC - OM186ST - OM186SR
ELECTRICAL CHARACTERISTICS (TC = 25°C unless otherwise noted)
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Parameter |
Conditions |
Min. |
Typ. |
Max. |
Units |
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Reference Voltage |
IOUT = 10 mA, Tj = 25°C |
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(VIN - VOUT) = 3 V |
1.238 |
1.250 |
1.262 |
V |
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10mA ≤ IOUT ≤ IFULL LOAD |
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1.5 V ≤ (VIN - VOUT) ≤ 25 V (Note 3) |
1.220 |
1.250 |
1.270 |
V |
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Line Regulation |
ILOAD = 10 mA, 1.5 V ≤ (VIN - VOUT) ≤ 15 V, |
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0.015 |
0.2 |
% |
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Tj = 25°C |
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0.035 |
0.2 |
% |
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15 V ≤ (VIN - VOUT) ≤ 35 V (Notes 1 & 2) |
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0.05 |
0.5 |
% |
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Load Regulation |
(VIN - VOUT) = 3 V |
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10 mA ≤ IOUT ≤ IFULL LOAD |
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Tj = 25°C |
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0.5 |
0.8 |
% |
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(Notes 1, 2, 3) |
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.8 |
1.0 |
% |
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Dropout Voltage |
∆VREF = 1%, IOUT = IFULL LOAD |
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1.3 |
1.5 |
V |
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Current Limit |
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OM183SC |
(VIN - VOUT) = 5 V |
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8.0 |
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A |
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(VIN - VOUT) = 25 V |
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0.4 |
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A |
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OM184SC |
(VIN - VOUT) = 5 V |
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5.5 |
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A |
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(VIN - VOUT) = 25 V |
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0.3 |
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A |
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OM185ST/SR |
(VIN - VOUT) = 5 V |
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3.2 |
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A |
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(VIN - VOUT) = 25 V |
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0.2 |
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A |
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OM186ST/SR |
(VIN - VOUT) = 5 V |
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1.5 |
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A |
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(VIN - VOUT) = 25 V |
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0.75 |
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A |
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Minimum Load Current |
(VIN - VOUT) = 25 V |
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5 |
10 |
mA |
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Thermal Regulation |
TA = 25°C, 30 ms pulse |
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OM183SC |
Guaranteed by design |
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0.002 |
0.01 |
%/W |
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OM184SC |
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0.003 |
0.15 |
%/W |
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OM185ST/SR |
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0.004 |
0.02 |
%/W |
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OM186ST/SR |
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0.010 |
0.05 |
%/W |
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Ripple Rejection |
f = 120 Hz |
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CADJ = 25 µF Tantalum |
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IOUT - IFULL LOAD (VIN - VOUT) = 3 V |
60 |
75 |
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dB |
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Adjust Pin Current |
TJ = 25°C |
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55 |
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µA |
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Adjust Pin Current Change |
10mA ≤ IOUT ≤ IFULL LOAD |
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3.3 |
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1.5 V ≤ (VIN - VOUT) ≤ 25 V |
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0.2 |
5 |
µA |
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Temperature Stability |
-55°C ≤ TJ ≤ +150°C |
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0.5 |
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% |
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Long Term Stability |
TA = 125°C, 1000 Hrs. |
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0.3 |
1 |
% |
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Thermal Resistance |
Junction-to-Case |
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TO-257AA/D2 Pac |
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4.2 |
°C/W |
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TO-258AA |
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2.75 |
°C/W |
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Note 1: Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation (OM183/60W, OM184/45W, OM185/30W, OM186/15W). Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range.
Note 3: IFULL LOAD curve is defined as the minimum value of current limit as a function of input to output voltage. Note that power dissipation is only achievable over a limited range of input to output voltage.
Note 4: Dropout voltage is specified over the full output current range of the device.
3.3 - 2