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3.3 - 169
3.3
Three Terminal, High Voltage, Precision
Adjustable Positive Voltage Regulator In
Hermetic JEDEC TO-257AA
4 11 R0
1.5 AMP HIGH VOLTAGE POSITIVE
ADJUSTABLE REGULATOR
FEATURES
Similar To Industry Standard LT117AHV
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 positive 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 57 volts using external resistors.
ABSOLUTE MAXIMUM RATINGS
@ 25C
Power Dissipation (P
d
) (Internally Limited) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W
Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 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
OM7620ST
3.3 - 170
3.3
OM7620ST
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
1.238
1.262
V
DIFF
= 3.3V
1.225
1.270
V
V
DIFF
= 40V
1.225
1.270
V
DIFF
= 60V
1.225
1.270
Line Regulation
R
LINE
3.0V V
DIFF
40V, V
OUT
= V
ref
, T
A
= 25C
-4.5
4.5
(Note 1)
3.3V V
DIFF
40V, V
OUT
= V
ref
-9
9
mV
40V V
DIFF
60V, V
OUT
= V
ref
, T
A
= 25C
-5
5
40V V
DIFF
60V, V
OUT
= V
ref
-10
10
Load Regulation
R
LOAD
V
DIFF
= 3.0V, 10mA I
L
1.5A, T
A
= 25C
-15
15
(Note 1)
V
DIFF
= 3.3V, 10mA I
L
1.5A
-15
15
mV
V
DIFF
= 40V, 10mA I
L
300mA, T
A
= 25C
-15
15
V
DIFF
= 40V, 10mA I
L
195mA
-15
15
V
DIFF
= 60V, 10mA I
L
30mA
-15
15
Thermal Regulation
V
RTH
V
IN
= 14.6V, I
L
= 1.5A
-5
5
mV
P
d
= 20 Watts, t = 20 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, T
A
= 25C
100
V
DIFF
= 3.3V
100
A
V
DIFF
= 40V
100
V
DIFF
= 60V
100
Adjustment Pin
I
Adj
V
DIFF
= 3.0V, 10mA I
L
1.5A, T
A
= 25C
-5
5
Current Change
V
DIFF
= 3.3V, 10mA I
L
1.5A
-5
5
V
DIFF
= 40V, 10mA I
L
300mA, T
A
= 25C
-5
5
V
DIFF
= 40V, 10mA I
L
195mA
-5
5
A
3.0V V
DIFF
40V, T
A
= 25C
-5
5
3.3V V
DIFF
40V
-5
5
3.3V V
DIFF
60V
-5
5
Miminum Load Current
I
Lmin
V
DIFF
= 3.0V, V
OUT
= 1.4V (forced), T
A
= 25C
5
V
DIFF
= 3.3V, V
OUT
= 1.4V (forced)
5
mA
V
DIFF
= 40V, V
OUT
= 1.4V (forced)
5
V
DIFF
= 60V, V
OUT
= 1.4V (forced)
7
Current Limit
I
CL
V
DIFF
= 5V
1.5
3.5
(Note 2)
V
DIFF
= 40V, T
A
= 25C
0.3
1.5
A
V
DIFF
= 60V, T
A
= 25C
0.05
0.50
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.
3.3 - 171
3.3
OM7620ST
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-75
-50
-25
0
25
50
75
100
125
150
0.4
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-75 -50 -25
0
25
50
75
100 125 150
-75
-50
-25
0
25
50
75
100
125
150
65
60
55
50
45
40
35
70
ADJUSTMENT PIN CURRENT
T
J
, Junction Temperature (C)
70
65
60
55
50
45
40
35
-75 -50 -25
0
25
50
75 100 125 150
1.260
1.250
1.240
1.230
1.220
-75
-50
-25
0
25
50
75
100
125
150
TEMPERATURE STABILITY
-75 -50 -25
0
25
50
75 100 125 150
T
J
, Junction Temperature (C)
1.260
1.250
1.240
1.230
1.220
CURRENT LIMIT
T
J
= 25C
T
J
= 55C
T
J
= 150C
4
3
2
1
0
0
10
20
30
40
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
3.0
2.5
2.0
1.5
1.0
-75
-50
-25
0
25
50
75
100
125
150
DROPOUT VOLTAGE
I
L
= 1.5A
V
O
= 100mV
I
L
= 20mA
I
L
= 1.0A
I
L
= 500mA
I
L
= 200mA
-75 -50 -25
0
25
50
75 100 125 150
T
J
, Junction Temperature (C)
3.0
2.5
2.0
1.5
1.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
MINIMUM OPERATING CURRENT
T
J
= 25C
T
J
= 55C
T
J
= 150C
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
TYPICAL APPLICATIONS
OM7620ST
V
IN
C
IN
*
0.1 F
V
OUT
C
o
**
1.0 F
R2
Adjust
I
Adj
R1
240
STANDARD APPLICATION
* C
IN
is required if regulator is located an
appreciable distance from power supply filter.
** C
o
is not needed for stability, however it does
improve transient response.
V
OUT
= 1.25 V (1 + )+ I
Adj
R2
Since I
Adj
is controlled to less than 100 A,
the error associated with this term is negligible
in most applications.
R2
R1
LOAD REGULATION
T
J
, Junction Temperature (C)
I
L
= 0.5A
V
I
= 15V
V
O
= 10V
I
L
= 1.5A
V
O
, Output Voltage Change (%)
I
O
, Output Current (A)
I
Adj
, Adjustment Pin Current (A)
V
ref
, Reference Voltage (V)
I
B
, Quiescent Current (mA)
V
I
- V
O
, Input - Output Voltage Differential (V
dc
)
3.3
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM7620ST
TYPICAL APPLICATIONS
+25V
V
IN
Adjust
OM7620ST
V
OUT
R1
V
O
I
O
1.25
V
IN
100
R2
V
ss*
2N5640
* To provide current limiting of I
O
to the
system ground, the source of the FET
must be tied to a negative voltage
below -1.25 V.
V
REF
V
REF
R2 R1
=
I
DSS
I
Omax +
I
DSS
V
O
< BV
DSS
+ 1.25 V + V
SS
I
Lmin
I
DSS
< I
O
< 1.5 A
As shown 0 < I
O
< 1 A
ADJUSTABLE CURRENT LIMITER
D
1
V
IN
V
OUT
OM7620ST
1N4002
1.0F
MPS2222
TTL
Control
1 K
720
Adjust
120
Minimum
V
OUT
= 1.25 V
D
1
protects the device during an input short circuit.
5 V ELECTRONIC SHUT DOWN REGULATOR
V
IN
V
OUT
OM7620ST
Adjust
R2
MPS2907
50 K
240
IN4001
+
10 F
(V
REF
) + I
Adj
1.25 V
I
OUT
=
@
R1
R1
10mA I
OUT
1.5 A
V
IN
V
OUT
Adjust
R1
I
OUT
I
Adj
OM7620ST
SLOW TURN-ON CURRENT
CURRENT REGULATOR
1
2
3
Tab
Isolated
Non-Isolated
Front View
Front View
Pin 1 - Adjust
Pin 1 - Adjust
Pin 2 - Output
Pin 2 - Output
Pin 3 - Input
Pin 3 - Input
Tab
- Isolated
Tab
- Output
CONNECTION DIAGRAM
.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