ISOLATED HERMETIC TO-257AA ADJUSTABLE
VOLTAGE REGULATORS
Three T erminal, Adjustable V oltage, 3.0 Amp
Precision Negative Regulators In Hermetic
JEDEC TO-257AA P ackage
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.
OM7611ST
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:
4 11 R3
Supersedes 1 07 R2
Rated Power @ 25°C
TC........................................................................28W
TA..........................................................................3W
Thermal Resistance
q
...................................................................4.2°C/W
JC
qJA.....................................................................42°C/W
3.3 - 153
3.3
OM7611ST
ELECTRICAL CHARACTERISTICS -55°C T
+125°C (unless otherwise specified)
A
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
Line Regulation ³V
(Note 1) ³V
Load Regulation ³V
(Note 1) ³I
REFVIN
OUT
IN
OUT
OUT
Thermal Regulation - 30 ms pulse, T
Ripple Rejection ³V
(Note 2) ³V
Adjust Pin Current I
Adjust Pin Current Change ³I
Minimum Load Current I
Current Limit I
Temperature Stability ³V
IN
REF
Adj
Adj
Min
Lim
OUT
(Note 2) ³T
Long Term Stability ³V
OUT
(Note 2) ³T
- V
Œ= 5 V, I
OUT
3 V V
3 V VIN- V
V
OUT
10 mA I
10 mA I
V
Œ= -10 V, f = 120 Hz, C
OUT
Œ= -10 V, f = 120 Hz, C
V
OUT
V
DIFF
10 mA I
3 V V
VIN- V
V
VIN- V
V
= 5 mA, TA= 25° C -1.238 -1.262
OUT
- V
Œ 35 V • -1.215 -1.285
IN
OUT
Π35 V
OUT
• 0.04
Œ 5 V, TA= 25° C 50
OUT IMAX.
V
Π5.0 V 1.0
OUT
OUT IMAX.
= 25° C 0.02 %/W
A
= 0
Adj
= 10 µF
Adj
• 75
• 1.5
56
• 53
70
• 60
= 35 V, IL= 10 mA • 100 µA
I
OUT
MAX.
- V
Œ 35 V • 5.0
IN
OUT
Œ 35 V • 5.0
OUT
- V
Œ 10 V • 3.0
IN
OUT
Π10 V
OUT
- V
Œ= 35 V
IN
OUT
• 2.0
3.0 6.0
• 3.0
0.5 2.5
• 0.5
-55° C TJ +125° C • 1.5 %
TA= +125° C, t = 1000 hrs 1.0 %
0.015
V
%/V
mV
%
dB
dB
µA
mA
A
A
3.3
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 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. The • denotes the specifications which apply over the full operating temperature range.
3.3 - 154
TYPICAL PERFORMANCE CHARACTERISTICS
Input Voltage
Change(V)
Output Voltage
Deviation (V)
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
-0.5
-1.0
0 10203040
Time (µS)
Line Transient Response
Reference Voltage (V)
1.270
1.260
1.250
1.240
1.230
-75 -50 -25 0 25 50 75 100125150
Temperature (°C)
Temperature Stability
Ripple Rejection (dB)
100
80
60
40
20
0
10 100 1k 10k 100k 1M
Frequency (Hz)
Ripple Rejection
Output Current (A)
5
4
3
2
1
0
0 5 10 15 20 25 30 35
Input-Output Differential (V)
Guaranteed Minimum Output Current
Load
Current (A)
Output Voltage
Deviation (V)
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
0
-0.5
-1.0
-1.5
0 10203040
Time (µS)
Load Transient Response
Current (mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 10203040
Input-Output Differential (V)
Minimum Load Current
Ripple Rejection (dB)
100
80
60
40
20
0
0.01 0.1 1 10
Output Current (A)
Ripple Rejection
Adjustment Current (µA)
80
75
70
65
60
55
50
-75 -50 -25 0 25 50 75 100 125150
Temperature (°C)
Adjustment Current
Output Impedance (µ)
101
100
10-1
10-2
10-3
10 100 1k 10k 100k 1M
Frequency (Hz)
Output Impedance
Input-Output Differential (V)
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
0.5 1.0 1.5 2.0 2.5 3.0
Output Current (A)
Dropout Voltage
Ripple Rejection (dB)
100
80
60
40
20
0
0 -10 -20 -30 -40
Output Voltage (V)
Ripple Rejection
Output Voltage
Deviation (%)
0.8
0.4
0
-0.4
-0.8
0 0.8 1.6 2.4 3.2 4.0
Output Current (A)
Load Regulation*
TJ = -55°C
TJ = -25°C
TJ = -150°C
TJ = -55°C
TJ = 25°C
TJ = 150°C
C
ADJ
= 0
C
ADJ
= 0
VIN = -15 V
V
OUT
= -10 V
VIN = -15V
V
OUT
= -10V
I
L
= 500mA
T
J
= 25°C
C
L
= 1µF
V
OUT
= -10V
IL = 50mA
TJ = 25°C
CL = 1µF
VIN = -15V
V
OUT
= -10V
IL = 50mA
TJ = 25°C
CL = 1µF
C
ADJ
= 10µF
f = 120Hz, TJ = 25°C
VIN = -15 V
V
OUT
= -10 V
IL = 500mA, TJ = 25°C
VIN - V
OUT
= 5 V
I
L
= 500 mA
f = 120Hz, TJ = 25°C
C
ADJ
= 10µF
C
ADJ
= 0
C
ADJ
= 10µF
C
ADJ
= 0
C
ADJ
= 0
C
ADJ
= 0
C
ADJ
= 10µF
C
ADJ
= 10µF
C
ADJ
= 10µF
OM7611ST
3.3
3.3 - 155
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM7611ST
.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
-V
OUT
-V
IN
V
IN
V
OUT
C
2
+
5µF
C
1
I
ADJ
C
3
+
10µF
2µF
Adj
OM7611
R2
R1
+
V
REF
V
OUT
= V
REF
(
1+ R2 ) +I
ADJ
(R2)
R1
R3
1.5k
1%
-V
OUT
-V
IN
V
IN
V
OUT
+
5µF
2µF
Adj
7V
LM329B
OM7611
R2*
R1
1k
1%
+
Solid
Tantalum
V
OUT
9.08 X 10
-3
*R2 =
R2
-V
OUT
3
- V
IN
+
2µF
+
2µF
+
2µF
2µF
IN4002
IN4002
+
Solid
Tantalum
-V
OUT
2
2µF
+
Solid
Tantalum
-V
OUT
1
2µF
+
Solid
Tantalum
V
IN
V
OUT
Adj
OM7611
V
IN
V
OUT
Adj
OM7611
V
IN
V
OUT
Adj
OM7611
C
1
R1
R2
R#N
10µF
C
3
+
TYPICAL APPLICATIONS
Multiple Tracking Regulators
High Stability Regulator
3.3
MECHANICAL OUTLINE PIN CONNECTION
Tab
123
Front View
Pin 1: Adjust
Pin 2: V
Pin 3: V
Tab: Isolated
IN
OUT
NOTES
• Case is metal/hermetically sealed
• Isolated Tab
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