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TVS Diode Arrays
Electronic Protection Array for ESD and Overvoltage Protection
SP720
Absolute Maximum Ratings
Continuous Supply Voltage, (V+) - (V-). . . . . . . . . . . . . . . . . . . . . . . . . +35V
Forward Peak Current, IIN to VCC, IIN to GND
(Refer to Figure 6) . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2A, 100μs
ESD Ratings and Capability (Figure 1, Table 1)
Load Dump and Reverse Battery (Note 2)
Thermal Information
Thermal Resistance (Typical, Note 1). . . . . . . . . . . . . . . . . . . . . θ JA ( o C/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Maximum Storage Temperature Range . . . .. . . . . . . . . . . . . . . -65 o C to 150 o C
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . . . . . . . . . . . 150 o C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . .. . . . . . .. . . . . . . . . .300 o C
(SOIC Lead Tips Only)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device
at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θ JA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications TA = -40 o C to 105 o C; VIN = 0.5VCC , Unless Otherwise Specified
PARAMETER
Operating Voltage Range,
SYMBOL
V SUPPLY
TEST CONDITIONS
MIN
-
TYP
2 to 30
MAX
-
UNITS
V
V SUPPLY = [(V+) - (V-)]
Forward Voltage Drop:
I IN = 1A (Peak Pulse)
IN to V-
IN to V+
V FWDL
V FWDH
-
-
2
2
-
-
V
V
Input Leakage Current
Quiescent Supply Current
Equivalent SCR ON Threshold
Equivalent SCR ON Resistance
Input Capacitance
Input Switching Speed
I IN
I QUIESCENT
C IN
t ON
Note 3
V FWD /I FWD ; Note 3
-20
-
-
-
-
-
5
50
1.1
1
3
2
20
200
-
-
-
-
nA
nA
V
?
pF
ns
5
NOTES:
2. In automotive and battery operated systems, the power supply lines should be externally protected for load dump and reverse battery. When the
V+ and V- pins are connected to the same supply voltage source as the device or control line under protection, a current limiting resistor should
be connected in series between the external supply and the SP720 supply pins to limit reverse battery current to within the rated maximum
limits. Bypass capacitors of typically 0.01 μ F or larger from the V+ and V- pins to ground are recommended.
3. Refer to the Figure 3 graph for definitions of equivalent “SCR ON Threshold” and “SCR ON Resistance.” These characteristics are given here
for thumb-rule information to determine peak current and dissipation under EOS conditions.
ESD Capability
TABLE 1. ESD TEST CONDITIONS
ESD capability is dependent on the application and defined test
STANDARD
TYPE/MODE
R D
C D
± V D
standard. The evaluation results for various test standards and methods
based on Figure 1 are shown in Table 1.
MIL STD 3015.7 Modified HBM
Standard HBM
1.5k ? 100pF 15kV
1.5k ? 100pF 6kV
For the “Modified” MIL-STD-3015.7 condition that is defined as an
IEC 61000-4-2
HBM, Air Discharge
330 ? 150pF 15kV
“in-circuit” method of ESD testing, the V+ and V- pins have a return path
to ground and the SP720 ESD capability is typically greater than 15kV
from 100pF through 1.5k ? . By strict definition of MIL-STD-3015.7 using
“pin-to-pin” device testing, the ESD voltage capability is greater than 6kV.
HBM, Direct Discharge
HBM, Direct Discharge,
Two Parallel Input Pins
330 ? 150pF
330 ? 150pF
4kV
8kV
The MIL-STD-3015.7 results were determined from AT&T ESD Test
EIAJ IC121
Machine Model
0k ?
200pF
1kV
Lab measurements.
The HBM capability to the IEC 61000-4-2 standard is greater than 15kV
for air discharge (Level 4) and greater than 4kV for direct discharge
(Level 2). Dual pin capability (2 adjacent pins in parallel) is well in excess
CHARGE
SWITCH
R 1
R D
DISCHARGE
SWITCH
of 8kV (Level 4).
For ESD testing of the SP720 to EIAJ IC121 Machine Model (MM) standard,
the results are typically better than 1kV from 200pF with no series resistance.
H.V.
SUPPLY
°± V D
C D
IN
DUT
IEC 1000-4-2: R 1 50 to 100M ?
MIL STD 3015.7: R 1 1 to 10M ?
FIGURE 1. ELECTROSTATIC DISCHARGE TEST
w w w. l i t t e l f u s e . c o m
229
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