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ISL9003AIRUJZ-T Datasheet(PDF) 10 Page - Intersil Corporation |
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ISL9003AIRUJZ-T Datasheet(HTML) 10 Page - Intersil Corporation |
10 / 12 page 10 FN6299.4 October 1, 2009 about 30µs/V to minimize current surge. The ISL9003A provides short-circuit protection by limiting the output current to about 265mA (typ). The LDO uses an independently trimmed 1V reference as its input. An internal resistor divider drops the LDO output voltage down to 1V. This is compared to the 1V reference for regulation. The resistor division ratio is programmed in the factory. Overheat Detection The bandgap outputs a proportional-to-temperature current that is indicative of the temperature of the silicon. This current is compared with references to determine if the device is in danger of damage due to overheating. When the die temperature reaches about +140°C, the LDO momentarily shuts down until the die cools sufficiently. In the overheat condition, if the LDO sources more than 50mA it will be shut off. Once the die temperature falls back below about +110°C, the disabled LDO is re-enabled and soft-start automatically takes place. ISL9003A |
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