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ISL61851FIBZ Datasheet(PDF) 10 Page - Intersil Corporation |
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ISL61851FIBZ Datasheet(HTML) 10 Page - Intersil Corporation |
10 / 20 page ISL6185 10 FN6937.1 June 27, 2011 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 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, thus providing more consistent operation over the entire temperature range. Latch-off Restart/Auto-Restart Start After turn-off, with the latch-off options, both the output and the FAULT signal are latched low until they are reset by the enable signal being de-asserted. At this time, the FAULT signal clears, and the IC is ready for enable to assert. On the auto restart options, the ISL6185 attempts to periodically turn-on the output at approximately 1s intervals, as long as the enable is asserted. If the OC condition remains indefinitely, the fault indication and the restart attempts also continue until the thermal protection feature is invoked, thus increasing the restart period. Active Output Pull-down Another ISL6185 feature is the 10k Ω active pull-down on the outputs to <60mV above GND when the device is disabled, thus ensuring discharge of the load. Typical Performance Curves FIGURE 3. SWITCH ON-RESISTANCE AT 0.5A FIGURE 4. NORMALIZED SWITCH RESISTANCE FIGURE 5. 0.6A CONTINUOUS CURRENT CHARACTERISTICS FIGURE 6. 1.1A CONTINUOUS CURRENT CHARACTERISTICS 150 140 130 120 110 100 90 80 70 60 50 -40 -25 0 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 0 254575 85 115 TEMPERATURE (°C) 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -40 -25 0 25457585 115 TEMPERATURE (°C) 5V ISC 5V ILIM 3.3V ILIM 3.3V ISC 5V ITRIP 3.3V 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 0 2545 7585 115 TEMPERATURE (°C) 3.3V ITRIP 5V ISC 5V ILIM 3.3V ILIM 3.3V ISC 5V ITRIP |
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