TPS7B7802-Q1

The TPS7B7802-Q1 is a monolithic dual channel, high voltage low-dropout regulator with an integrated ADC and I2C interface. The device has a wide input voltage operating range, and is designed to protect against a 45V input voltage load dump scenario. This device is an excellent choice to power remotely located LNAs (associated with AM/FM/GNSS antenna), microphone and camera modules over coax cables. In harsh automotive environments, coax cables are potentially exposed to various fault conditions, increasing risk of failure. Such conditions include short to ground, short to battery, and overtemperature. TPS7B7802-Q1 comes with integrated protection features against each of these fault conditions, as well as protection against reverse polarity. The device incorporates a topology containing two back-to-back P-channel metal-oxide semiconductor field-effect transistors (MOSFETs). This PMOS topology eliminates the need for an external diode that is otherwise required to prevent the flow of reverse current. Each channel can provide up to 300mA of output current and an adjustable output voltage from 2V to 40V.

This device can uniquely identify and diagnose several fault conditions. This diagnosis information can be inferred from a register via I2C communication and the error pin. The integrated 10-bit ADC allows the user to continuously monitor the input voltage, output voltage, junction temperature and load current. The device features a high accuracy current sense circuitry across the current range (≤ ±12.5% for 1mA to 23.5mA, and <±9.5% for >75mA) for both channels. This feature allows the device to precisely detect and distinguish between open, normal and short-circuit conditions without further calibration. Each channel also offers adjustable current limit, that can be set using I2C communication.

This device operates over −40°C to +125°C ambient temperature range and is available in a 4.0mm × 4.0mm, 20-pin WQFN (wettable flank) (RTJ-WF) thermally conductive package.