OMNIREL OM7603ST Datasheet
ISOLATED HERMETIC TO-257AA
ADJUST ABLE V OL T A GE REGULA TOR
Three T erminal, Adjustable V oltage, 1.5 Amp
Precision Negative Regulator In Hermetic
JEDEC TO-257AA P ackage
FEA TURES
• Isolated Hermetic Package, JEDEC TO-257AA Outline
• Adjustable Output Voltage
• Eliminates Stocking Fixed Voltages
• Built-In Thermal Overload Protection
• Short Circuit Current Limiting
• Product Is Available Screened To MIL-STD -883
• Similar To Industry Standard P/N LM137
OM7603ST
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, 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
Typical Power/Thermal Characteristics:
Rated Power @ 25°C
TC..............................................................17.5W
TA.................................................................3W
Thermal Resistance
qJC............................................................3.5°C/W
qJA.............................................................42°C/W
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
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
Line Regulation R
REF
LINE
(Note 1) 3.0V V
Load Regulation R
LOAD
(Note 1) V
Thermal Regulation V
Ripple Rejection R
RTH
N
(Note 2) C
Adjustment Pin Current I
Adjustment Pin ³I
Adj
Adj
Current Change (line) 3V V
³I
Adj
(load) V
Miminum Load Current I
Current Limit I
Lmin
CL
(Note 2) V
V
= 3.0V, TA= 25°C -1.262 -1.238
DIFF
V
= 3.0V • -1.280 -1.220 V
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 -25 25
DIFF
V
DIFF
40V, TA= 25°C -4.5 4.5
DIFF
40V • -13.8 13.8 mV
DIFF
= 5V, 8mA I
= 40V, 8mA I
1.5A • -25 25
L
1.5A, TA= 25°C -25 25 mV
L
1.5A • -50 50
L
Vin= -14.6V, IL= 1.5A -5 5 mV
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 • -5 5 µA
DIFF
= 3.0V, V
= 10V, V
= 40V, V
V
DIFF
= V
out
ref
= 100 mA
out
= 3.0V • 100
DIFF
= 40V • 100 µA
DIFF
40V • -5 5 µA
DIFF
= -1.4V (forced) • 3.0
out
= -1.4V (forced) • 3.0 mA
out
t = -1.4V (forced) • 5.0
ou
5V • 1.5 3.5
DIFF
• 66 dB
= 40V, TA= 25°C 0.24 1.2 A
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
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