OM7611ST
ISOLATED HERMETIC TO-257AA ADJUSTABLE
VOLTAGE REGULATORS
Three Terminal, Adjustable Voltage, 3.0 Amp
Precision Negative Regulators In Hermetic
JEDEC TO-257AA Package
FEATURES
•
•
•
•
•
•
Isolated Hermetic Package, JEDEC TO-257AA Outline
Reference Voltage Set Internally to ±2%
Built-In Thermal Overload Protection
Short Circuit Current Limiting
Pin Out Identical To Plastic TO-220
Product Is Available Screened To MIL-STD-883
DESCRIPTION
These three terminal negative regulators are supplied in a hermetically sealed metal
package whose outline is similar to the industry standard TO-220 plastic package. All
protective features are designed into the circuit, including thermal shutdown, current
limiting and safe-area control. With heat sinking, they can deliver over 3.0 amps of
output current. These units feature 2% initial voltage tolerance, with 1.0% load
regulation and .015% line regulation.
ABSOLUTE MAXIMUM RATINGS
@ 25°C
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +150°C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65° to +150°C
Typical Power/Thermal Characteristics:
Rated Power @ 25°C
T
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28W
T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W
Thermal Resistance
q
JC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W
q
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W
3.3
4 11 R3
Supersedes 1 07 R2
3.3 - 153
OM7611ST
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
Symbol
V
REF
-55°C T
A
+125°C (unless otherwise specified)
Min.
-1.238
Max.
-1.262
V
-1.215
-1.285
0.015
%/V
0.04
50
mV
75
1.0
%
1.5
0.02
56
%/W
dB
53
70
dB
60
100
2.0
µA
5.0
5.0
mA
3.0
3.0
6.0
A
3.0
0.5
2.5
A
0.5
1.5
%
µA
Unit
Test Conditions
V
IN
- V
OUT
Œ=
5 V, I
OUT
= 5 mA, T
A
= 25° C
3V
V
IN
- V
OUT
Œ
35 V
V
IN
- V
OUT
Œ
35 V
•
•
•
•
Line Regulation
(Note 1)
Load Regulation
(Note 1)
³V
OUT
³V
IN
³V
OUT
³I
OUT
3V
V
OUT
Œ
5 V, T
A
= 25° C
10 mA I
OUT
I
MAX.
V
OUT
Œ
5.0 V
10 mA I
OUT
I
MAX.
Thermal Regulation
Ripple Rejection
(Note 2)
-
³V
IN
³V
REF
30 ms pulse, T
A
= 25° C
V
OUT
Œ
-10 V, f = 120 Hz, C
Adj
= 0
=
•
•
•
•
•
•
•
•
•
•
=
V
OUT
Œ
-10 V, f = 120 Hz, C
Adj
= 10 µF
Adjust Pin Current
Adjust Pin Current Change
I
Adj
³I
Adj
V
DIFF
= 35 V, I
L
= 10 mA
10 mA I
OUT
3V
Minimum Load Current
I
Min
I
MAX.
V
IN
- V
OUT
Œ
35 V
V
IN
- V
OUT
Œ
35 V
V
IN
- V
OUT
Œ
10 V
Current Limit
I
Lim
V
IN
- V
OUT
Œ
10 V
V
IN
- V
OUT
Œ=
35 V
Temperature Stability
(Note 2)
Long Term Stability
(Note 2)
³V
OUT
³T
³V
OUT
³T
-55° C T
J
+125° C
T
A
= +125° C, t = 1000 hrs
1.0
%
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 maxim
um power dissipation of 30 W.
Power dissipation is determined by the input/output differential voltage and the output curren
t. 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.
3.3
3. The • denotes the specifications which apply over the full operating temperature range.
3.3 - 154
OM7611ST
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage
Input-Output Differential (V)
Reference Voltage (V)
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
T
J
= -150°C
Temperature Stability
1.270
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
Minimum Load Current
T
J
= -55°C
T
J
= -25°C
1.250
1.240
1.230
-75 -50 -25 0 25 50 75 100125150
Temperature (°C)
Current (mA)
1.260
T
J
= -55°C
T
J
= 150°C
T
J
= 25°C
0.5 1.0 1.5 2.0 2.5 3.0
Output Current (A)
0
10
20
30
40
Input-Output Differential (V)
Ripple Rejection
100
Ripple Rejection (dB)
80
60
40
V
IN
- V
OUT
= 5 V
C
ADJ
= 0
Ripple Rejection
100
Ripple Rejection (dB)
Ripple Rejection (dB)
80
C
ADJ
= 10µF
Ripple Rejection
100
C
ADJ
= 10µF
C
ADJ
= 10µF
80
60
C
ADJ
= 0
60
40
20
0
10
C
ADJ
= 0
V
IN
= -15 V
V
OUT
= -10 V
I
L
= 500mA, T
J
= 25°C
40
V
IN
= -15 V
20
0
0
I
L
= 500 mA
f = 120Hz, T
J
= 25°C
20
V
OUT
= -10 V
f = 120Hz, T
J
= 25°C
-10 -20 -30
Output Voltage (V)
Output Impedance
-40
100 1k 10k 100k 1M
Frequency (Hz)
0
0.01
0.1
1
Output Current (A)
10
Line Transient Response
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
-0.5
-1.0
C
ADJ
= 0
Load Transient Response
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
0
-0.5
-1.0
-1.5
Output Voltage
Deviation (V)
C
ADJ
= 0
Output Impedance (µ)
V
IN
= -15V
V
OUT
= -10V
I
L
= 500mA
T
J
= 25°C
C
L
= 1µF
C
ADJ
= 0
100
10-1
10-2
Input Voltage Output Voltage
Change(V)
Deviation (V)
101
C
ADJ
= 10µF
V
IN
= -15V
V
OUT
= -10V
I
L
= 50mA
T
J
= 25°C
C
L
= 1µF
C
ADJ
= 10µF
10-3
10 100 1k 10k 100k 1M
Frequency (Hz)
Load
Current (A)
V
OUT
= -10V
I
L
= 50mA
T
J
= 25°C
C
L
= 1µF
C
ADJ
= 10µF
0
10
20
30
Time (µS)
40
0
10
20
30
Time (µS)
40
3.3
Load Regulation*
0.8
0.4
0
-0.4
-0.8
0
0.8 1.6 2.4 3.2
Output Current (A)
4.0
Output Current (A)
Guaranteed Minimum Output Current
5
Adjustment Current (µA)
4
3
2
1
0
0 5 10 15 20 25 30 35
Input-Output Differential (V)
Adjustment Current
80
75
70
65
60
55
50
-75 -50 -25 0 25 50 75 100 125 150
Temperature (°C)
Output Voltage
Deviation (%)
3.3 - 155
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