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Электронный компонент: OM7612NT

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3.3 - 161
3.3
OM7612ST
Three Terminal, High Voltage, Precision
Adjustable Negative Voltage Regulator In
Hermetic JEDEC TO-257AA Package
4 11 R0
1.5 AMP HIGH VOLTAGE NEGATIVE
ADJUSTABLE REGULATOR
FEATURES
Similar To Industry Standard LT137AHV
Adjustable Output Voltage
Built In Thermal Overload Protection
Short Circuit Current Limiting
Available In Isolated and Non-Isolated Package
Maximum Output Voltage Tolerance Is Guaranteed To 1%
Available Hi-Rel Screened
DESCRIPTION
This three terminal negative regulator is 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, these devices can deliver up to 1.5
amps of output current. The unit also features output voltages that can be fixed from
-1.2 volts to -47 volts.
ABSOLUTE MAXIMUM RATINGS
@ 25C
Power Dissipation (Pd) (Internally Limited). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W
Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C
Lead Temperature (Soldering 10 seconds). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300C
Thermal Resistance:
q
JC
(Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2C/W
q
JC
(Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5C/W
q
JA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W
Maximum Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 A
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3.3 - 162
3.3
OM7612ST
ELECTRICAL CHARACTERISTICS
-55C T
A
125C, I
L
= 8mA (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min.
Max.
Unit
Reference Voltage
V
REF
V
DIFF
= 3.0V, T
A
= 25C
-1.262
-1.238
V
DIFF
= 3.0V
-1.28
-1.22
V
V
DIFF
= 50V, T
A
= 25C
-1.28
-1.22
V
DIFF
= 50V
-1.28
-1.22
Line Regulation
R
LINE
3.0 V V
DIFF
50V, T
A
= 25C
-6
6
(Note 1)
-20
20
mV
Load Regulation
R
LOAD
V
DIFF
50V, 8mA I
L
110mA, T
A
= 25C
-25
25
(Note 1)
V
DIFF
= 5V, 8mA I
L
1.5A, T
A
= 25C
-25
25
mV
-50
50
Thermal Regulation
V
RTH
V
in
= -14.6V, I
L
= 1.5A
-5
5
mV
P
d
= 20 Watts, t = 10 ms, T
A
= 25C
Ripple Rejection
R
N
f = 120 Hz, V
OUT
= V
ref
66
dB
(Note 2)
C
Adj
= 10 F, I
OUT
= 100 mA
Adjustment Pin Current
I
Adj
V
DIFF
= 3.0V
100
V
DIFF
= 40V
100
A
V
DIFF
= 50V
100
Adjustment Pin
I
Adj
V
DIFF
= 5V, 8mA I
OUT
1.5A
-5
5
A
Current Change
3V V
DIFF
50V, I
L
8mA
-6
6
Miminum Load Current
I
Lmin
V
DIFF
= 3.0V, V
OUT
= -1.4V (forced)
3
V
DIFF
= 10V, V
OUT
= -1.4V (forced)
3
mA
V
DIFF
= 40V, V
OUT
= -1.4V (forced)
5
V
DIFF
= 50V, V
OUT
= -1.4V (forced)
5
Current Limit
I
CL
V
DIFF
= 5V
1.5
3.5
(Note 2)
V
DIFF
= 50V, T
A
= 25C
0.2
1.0
A
Notes:
1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used.
Changes in output voltage due to heating effects must be taken into account separately.
2. If not tested, shall be guaranteed to the specified limits.
3. The
denotes the specifications which apply over the full operating temperature range.
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3.3 - 163
3.3
OM7612ST
TYPICAL PERFORMANCE CHARACTERISTICS
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
-50
-25
0
25
50
75
100
125
150
4
3
2
1
0
0
10
20
30
40
80
75
70
65
60
55
50
45
40
-50
-25
0
25
50
75
100
125
150
3.0
2.5
2.0
1.5
1.0
-50
-25
0
25
50
75
100
125
150
LOAD REGULATION
T
J
, Junction Temperature (C)
I
L
= 0.5A
I
L
= 1.5A
V
I
= -15V
V
O
= -10V
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
-75
-50
-25
0
25
50
75
100 125
150
ADJUSTMENT PIN CURRENT
T
J
, Junction Temperature (C)
80
75
70
65
60
55
50
45
40
-75
-50
-25
0
25
50
75
100 125 150
TEMPERATURE STABILITY
T
J
, Junction Temperature (C)
1.270
1.260
1.250
1.240
1.230
-75
-50
-25
0
25
50
75
100 125 150
CURRENT LIMIT
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
T
J
= -25C
T
J
= -55C
T
J
= -150C
4
3
2
1
0
0
10
20
30
40
DROPOUT VOLTAGE
T
J
, Junction Temperature (C)
I
L
= 1.5A
V
O
= -5V V
O
= 100mV
I
L
= 20mA
I
L
= 1.0A
I
L
= 500mA
I
L
= 200mA
3.0
2.5
2.0
1.5
1.0
-50
-25
0
25
50
75
100
125 150
MINIMUM OPERATING CURRENT
T
J
= 25C
T
J
= -55C
T
J
= 150C
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
10
20
30
40
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
V
ref
, Reference Voltage (V)
V
O
, Output Voltage Change (%)
I
O
, Output Current (A)
I
Adj
, Adjustment Pin Current (A)
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
I
B
, Quiescent Current (mA)
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3.3
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM7612ST
TYPICAL APPLICATIONS
1
2
3
Tab
CONNECTION DIAGRAM
* CIN is required if regulator is located more than
4 inches from power supply filter. A 1 F solid
tantalum or 10 F aluminum electrolytic is
recommended.
** CO is necessary for stability. A 1 F solid
tantalum or 10 F aluminum electrolytic is
recommended.
VOUT = -1.25 V (1 +R2)
R1
Isolated
Non-Isolated
Front View
Front View
Pin 1 - Adjust
Pin 1 - Adjust
Pin 2 - Input
Pin 2 - Input
Pin 3 - Output
Pin 3 - Output
Tab
- Isolated
Tab
- Input
HIGH STABILITY REGULATOR
Adj
V
IN
V
OUT
OM7612ST
+
1F
Solid
Tantalum
R
3
1.5K
1%
+
1F
Solid
Tantalum
7V
LM329B
R
2
*
R
1
1k
1%
-V
OUT
-V
IN
(V
OUT
)
9.08 x 10
-3
*R2 =
- 908
OM7612ST
1.0F
1.0F
-V
IN
-V
OUT
V
OUT
V
IN
I
Adj
I
PROG
C
IN
*
C
O
**
R
2
R
1
120
+
+
.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
NOTES
Case is metal/hermetically sealed
Isolated Tab
DUAL TRACKING SUPPLY 1.25V TO 20V
D1
IN4002
OM7620ST
V
IN
V
OUT
Adj
Adj
V
IN
V
OUT
OM7612ST
+V
IN
+V
OUT
-V
IN
-V
OUT
R2
5K
1%
R4
5k
1%
R1**
100
1%
2.2*
F
1F*
D2
IN4002
1F*
10F
10F
*
Solid Tantalum
** R1 or R2 may be trimmed slightly to improve tracking.
R3
5K
R5**
100
1%
+
+
2.2*
F