247

www .littelfuse .com

5

TVS Diode Arrays

SP724

SCR Diode Array for ESD and Transient Overvoltage Protection

Absolute Maximum Ratings

Continuous Supply Voltage, (V+) - (V-). ........................ +20V

Forward Peak Current, IIN to VCC , GND

(Refer to Figure 6). ................................±2.2A, 100µs

ESD Ratings and Capability - See Figure 1, Table 1

Thermal Information

Thermal Resistance (Typical, Note 3)

θJA (

o

C/W)

SOT Package . ........................................... 220

(SOT - Lead Tips Only)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Operating Voltage Range,

1

-

20

V

Forward Voltage Drop

IN to V-

-

2

-

V

IN to V+

-2-

V

Input Leakage Current

-10

1

10

nA

Quiescent Supply Current

V+ = 20V, V- = GND

-

-

100

nA

Equivalent SCR ON Threshold

(Note 6)

-

1.1

-

V

Equivalent SCR ON Resistance

-

1.0

-

Ω

Input Capacitance

-3-

pF

NOTES:

4. In automotive and other battery charging systems, the SP724 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 SP724 supply pins to limit reverse battery current to within the rated maximum limits.

5. Bypass capacitors of typically 0.01µF or larger should be connected closely between the V+ and V- Pins for all applications.

6. Refer to the Figure 3 graph for definitions of equivalent “SCR ON Threshold” and “SCR ON Resistance”. These characteristics are given here

for information to determine peak current and dissipation under EOS conditions.

ESD Rating

ESD rating is dependent on the defined test standard. The evaluation

results for various test standards and methods based on Figure 1 are

shown in Table 1.3

The SP724 has a Level 4 rating when tested to the IEC 61000-4-2

Human Body Model (HBM) standard and connected in a circuit in which

the V+ and V- pins have a return path to ground. Level 4 specifies a

required capability greater than 8kV for direct discharge and greater than

15kV for air discharge.

The “Modified” MIL-STD-3015.7 condition is defined as an “in-circuit”

method of ESD testing, the V+ and V- pins have a return path to

ground.The SP724 ESD capability is greater than 8kV with 100pF

discharged through 1.5kΩ. By strict definition of the standard MIL-

STD-3015.7 method using “pin-to-pin” device testing, the ESD voltage

capability is greater than 2kV.

For the SP724 EIAJ IC121 Machine Model (MM) standard, the ESD capa-

bility is typically greater than 1.8kV with 200pF discharged through 0kΩ.

The Charged Device model is based upon the self-capacitance of the

SOT-23 package through 0kΩ.

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:

3. θJA is measured with the component mounted on an evaluation PC board in free air.

STANDARD

TYPE/MODE

IEC 61000-4-2

(Level 4)

HBM, Air Discharge

330Ω 150pF

15kV

HBM, Direct Discharge

330Ω 150pF

8kV

MIL-STD-3015.7 Modified HBM

1.5kΩ 100pF

8kV

†

Standard HBM

1.5kΩ 100pF

2kV

EIAJ IC121

Machine Model

0kΩ

200pF

400V

US ESD DS 5.3 Charged Device Model

0kΩ

NA

3kV

H.V.

SUPPLY

IN

DUT

CHARGE

SWITCH

DISCHARGE

SWITCH

FIGURE 1. ELECTROSTATIC DISCHARGE TEST

TABLE 1. ESD TEST CONDITIONS