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, they can deliver over 1.0 amp of
output current. This unit features output voltages that can be trimmed using external
resistors, from -1.2 volts to -37 volts.
ABSOLUTE MAXIMUM RATINGS @ 25°C
Input-Output Voltage Differential ...........................................40V
Operating Junction Temperature Range .........................-55°C to +150°C
Storage Temperature Range.....................................-65° to +150°C
Note: This device is also available in a non-isolated JEDEC TO-257AA package.
Use part number OM7603NT for non-isolated unit.
3.3
4 11 R4
Supersedes 1 07 R3
3.3 - 137
OM7603ST
ELECTRICAL CHARACTERISTICS -55°C T
125°C, IL= 8mA (unless otherwise specified)
A
ParameterSymbolTest ConditionsMin.Max.Unit
Reference VoltageV
Line RegulationR
REF
LINE
(Note 1)3.0V V
Load Regulation R
LOAD
(Note 1)V
Thermal RegulationV
Ripple RejectionR
RTH
N
(Note 2)C
Adjustment Pin CurrentI
Adjustment Pin ³I
Adj
Adj
Current Change(line)3V V
³I
Adj
(load)V
Miminum Load CurrentI
Current LimitI
Lmin
CL
(Note 2)V
V
= 3.0V, TA= 25°C-1.262-1.238
DIFF
V
= 3.0V•-1.280-1.220V
DIFF
V
= 40V•-1.280-1.220
DIFF
3.0 V V
V
DIFF
= 12V, 8mA I
DIFF
V
40V, 8mA IL 1.5A, TA= 25°C-2525
DIFF
V
DIFF
40V, TA= 25°C-4.54.5
DIFF
40V•-13.813.8mV
DIFF
= 5V, 8mA I
= 40V, 8mA I
1.5A•-2525
L
1.5A, TA= 25°C-2525mV
L
1.5A•-5050
L
Vin= -14.6V, IL= 1.5A-55mV
P
= 20 Watts, t = 10 ms, TA= 25°C
d
V
DIFF
V
DIFF
V
DIFF
f = 120 Hz, V
= 10 µF, I
Adj
V
V
= 5V, 8mA IL 1.5A•-55µA
DIFF
= 3.0V, V
= 10V, V
= 40V, V
V
DIFF
= V
out
ref
= 100 mA
out
= 3.0V•100
DIFF
= 40V•100µA
DIFF
40V•-55µA
DIFF
= -1.4V (forced)•3.0
out
= -1.4V (forced)•3.0mA
out
t = -1.4V (forced)•5.0
ou
5V•1.53.5
DIFF
•66dB
= 40V, TA= 25°C0.241.2A
3.3
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 - 138
TYPICAL PERFORMANCE APPLICATIONS
0.20
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
-50-25
0255075100
125
150
4
3
2
1
0
0
10
20
3040
80757065
6055504540
-50-250
255075100
125
150
3.0
2.5
2.0
1.5
1.0
-50
-25
0255075100
125150
OM7603ST
LOAD REGULATION
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
, Output Voltage Change (%)
O
-1.4
VI= -15V
VO= -10V
-75-50 -25 025 50 75 100 125 150
IL= 1.5A
TJ, Junction Temperature (C°)
ADJUSTMENT PIN CURRENT
80
75
70
65
60
55
50
45
, Adjustment Pin Current (µA)
Adj
I
40
-75 -50 -25 0 25 50 75 100 125 150
TJ, Junction Temperature (C°)
IL= 0.5A
CURRENT LIMIT
4
3
2
1
, Output Current (A)
O
I
0
010203040
VI- VO, Input - Output Voltage Differential (Vdc)
TJ= -55°C
TJ= -25°C
TJ= -150°C
DROPOUT VOLTAGE
)I
dc
3.0
2.5
2.0
1.5
, Input - Output Voltage Differential (V
O
1.0
- V
I
V
VO= -5V ³VO= 100mV
IL= 500mA
IL= 1.5A
IL= 1.0A
IL= 200mA
IL= 20mA
-50 -25 025 50 75 100 125 150
TJ, Junction Temperature (C°)
TEMPERATURE STABILITY
1.270
1.260
MINIMUM OPERATING CURRENT
1.8
1.6
1.4
TJ= -55°C
TJ= 25°C
TJ= 150°C
3.3
1.2
1.250
1.0
0.8
1.240
, Reference Voltage (V)³V
ref
V
1.230
-75-50 -25 0 25 50 75 100 125 150
TJ, Junction Temperature (C°)
3.3 - 139
0.6
0.4
, Quiescent Current (mA)
B
0.2
0
010203040
V
- VO, Input - Output Voltage Differential (Vdc)
I
205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246
OM7603ST
.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
TYPICAL APPLICATIONS
HIGH STABILITY REGULATOR
Out
)
R2*
R1
1k
1%
-3
7V
LM329B
+
1µF
Solid
Tantalum
Adj
V
-V
IN
IN
OM7603ST
V
OUT
*R2 =- 908
R3
1.5K
1%
(V
9.08 x 10
STANDARD APPLICATION
*CINis required if regulator is located more than 4 inches
from power supply filter. A 1µF solid tantalum or 10µF
aluminum electrolytic is recommended.
** COis necessary for stability. A 1µF solid tantalum or
10µF aluminum electrolytic is recommended.
R
V
V
OUT
OUT
= -1.25V (1 +
= -1.25V (1 +
R1
2
)
+
1µF
Solid
Tantalum
-V
OUT
DUAL TRACKING SUPPLY ±1.25V TO ±20V
I
1.0µF
V
I
I
PRO
I
Ad
OM7603ST
OM7602ST
VINV
+
1µF*
+
10µF
+
10µF
+
1µF*
VINV
OM7603ST
Adj
Adj
R2
OUT
R2
5K
1%
R4
5k
1%
OUT
R1
120
+
R1**
2.2*
100
µF
1%
R3
5K
+
R5**
2.2*
100
µF
1%
++
*
O
1.0µF
V
OU
+V
D1
IN4002
D2
IN4002
-V
OUT
-V
+V
-V
IN
* Solid Tantalum
** R1 or R5 may be trimmed slightly to improve tracking.