Dual LDO with Diagnosis | E522.40

The E522.40 is a dual phantom supply with I²C interface for antennas in automotive environments. It affords protection of the antenna lines against ESD, short to ground and battery, as well as protection against thermal over-stress of the IC. The I²C interface allows addressing of several devices with only 2 interface lines. Various antenna voltages from 3.3V to 18V can be programmed independently using external voltage dividers. A separate control line can be connected to an external bipolar NPN-transistor as a pre-regulator to reduce power dissipation in the IC. An I²C interface in conjunction with a 8bit ADC allows monitoring of antenna voltages and currents. Overcurrent and open load limits can be programmed for each antenna line separately, and will lead to automatic shutoff if tripped. An analog sense input and digital control line can be used to interface with an additional phantom supply or for other functions.