ISL61852BCRZ datasheet(10/20 Pages) INTERSIL

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ISL6185

FN6937.0

October 22, 2010

Turn-off Time Delay

During operation, once an OC condition is detected

the output is current limited for ~12ms to allow

transient OC conditions to pass. If still in current limit

and after the current limit period has elapsed, the

output is then turned off and the fault is reported by

pulling the corresponding FAULT low. The internal

12ms timer starts upon current limiting and is

independent of ambient or IC thermal conditions

providing more consistent operation over the entire

temp range.

Latchoff Restart/Auto-Restart Start

After turn-off, with the latch off options both the

output and the FAULT signal are latched low until

reset by the enable signal being de-asserted at which

time the FAULT signal will clear and the IC is ready for

enable to assert. On the auto restart options the

ISL6185 will attempt to periodically turn-on the

output at approximately 1s intervals as long as the

enable is asserted. If the OC condition remains

indefinitely so will the fault indication and the restart

attempts until such time that the thermal protection

feature is invoked increasing the restart period.

Active Output Pull-down

Another ISL6185 feature is the 10kΩ active pull-down on

the outputs to <60mV above GND when the device is

disabled ensuring discharge of the load.

Typical Performance Curves

FIGURE 1. SWITCH ON-RESISTANCE AT 0.5A

FIGURE 2. NORMALIZED SWITCH RESISTANCE

FIGURE 3. 0.6A CONTINUOUS CURRENT

CHARACTERISTICS

FIGURE 4. 1.1A CONTINUOUS CURRENT

CHARACTERISTICS

150

140

130

120

110

100

-40

-25

457585

115

TEMPERATURE (°C)

VIN = 2.5V

VIN = 3.3V

VIN = 5V

0.7

0.8

0.9

1.0

1.1

1.2

1.3

-40

-25

254575

115

TEMPERATURE (°C)

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

-40

-25

25457585

115

TEMPERATURE (°C)

3.3V ITRIP

5V ISC

5V ILIM

3.3V ILIM

3.3V ISC

5V ITRIP

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

-40

-25

2545

7585

115

TEMPERATURE (°C)

3.3V ITRIP

5V ISC

5V ILIM

3.3V ILIM

3.3V ISC

5V ITRIP

ISL6185

ISL61852BCRZ 数据表(PDF) 10 Page - Intersil Corporation

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