LT1188

The LT1188 is a monolithic high side switch employing bipolar technology.The device is designed to operate in harsh environments such as those encountered in the automotive industry.The device incorporates an internal clamp diode to clamp the negative voltage spikes generated by inductive loads such as solenoids and is capable of withstanding load dumps of 60V on the supply pin while clamping such spikes.Standby current is only 500A and ground pin current, when driving a 1A load, is only 5mA.

Features of the LT1188 are:(1)1.5A bipolar switch; (2)controlled output slew rate (2V/s) to limit R.F.I.generation; (3)60V load dump capability with inductive kickback; (4)internal negative voltage clamp for inductive loads; (5)500A standby current; (6)logic input-TTL levels; (7)low input bias current (20A); (8)status output; (9)short circuit detection and shutoff; (10)open circuit detection; (11)overtemp detection and shutoff.The device's input logic levels are designed to be compatible with standard TTL levels while drawing only 20A in the on state. A status output is provided to inform the user of the condition of the output load as well as the switch.The status pin will change state for shorted as well as open loads and will also indicate when the device is above normal operating temperature.

The absolute maximum ratings of the LT1188 can be summarized as:(1)supply voltage:30V;(2)storage temperature:-65 to 150;(3)operating temperature range:-55 to 125;(4)junction temperature range:-55 to 175;(5)lead temperature:300;(6)logic input voltage:30V. The device protects itself against short circuited loads by limiting output current and then shutting itself off after a specified time if the short remains. The device protects itself against overtemperature by shutting itself off.Overtemperature shutoff occurs at a temperature above where the status pm overtemp indication occurs, allowing the user time to recognize and possibly correct the problem before drive to the load is removed.