DESCRIPTION
In either mode The HIP1090 has a low saturated forward voltage drop. As such, the HIP1090 operates as a transient suppressor where the PNP drive transistor is switched off when VIN is greater than the Over-Voltage Shutdown range of 16V to 19V. Shutdown also occurs when VIN is less than the forward turn-on threshold of approximately 2.5V, including the negative voltage range. The merits of transient suppression depend on the required integrity of the applications load elements. Instrument panel signal warning lights for critical functions such as overtemperature or low fluid levels can be protected by the HIP1090 against high level transient voltages and double battery conditions that may potentially cause bulb burnouts. The HIP1090 may be used to protect the power supplies of small signal or logic circuits with voltages ranging from 4V to 16V, effectively blocking higher peak voltages. The HIP1090 has internal current limiting protection in the range of 1A to 2A for short circuit to ground conditions and thermal shutdown protection when the junction temperature is greater than 150oC.
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