For automotive off-board sensors and low-current off-board modules, the power supply is through a long cable from the main board. In such cases, protection is required in the power devices for the off-board loads to prevent the onboard components from damage during a short to GND or short to battery caused by a broken cable. Off-board sensors require a power supply as consistent as that for onboard components to secure high accuracy of data acquisition.
●The TPS7B4254-Q1 device is designed for automotive applications with a 45-V load dump. The device can either be used as one tracking low-dropout (LDO) regulator or as a voltage tracker to build one closed power loop for off-board sensors with an onboard main supply. The output of the device is accurately regulated by a reference voltage at the ADJ pin.
●To provide an accurate power supply to the off-board modules, the device offers a 4-mV ultralow tracking tolerance between the ADJ and FB pins across temperature. The back-to-back PMOS topology eliminates the need for an external diode under a reverse-polarity condition. The TPS7B4254-Q1 device also includes thermal shutdown, inductive clamp, overload, and short-to-battery protection to prevent damage to onboard components during extreme conditions.
● Qualified for Automotive Applications
● AEC-Q100 Qualified With the Following Results
● Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
● Device HBM ESD Classification Level 3A
● Device CDM ESD Classification Level C6
● –40-V to 45-V Wide Input-Voltage Range (Maximum)
● Output-Voltage Adjust Range: 2 V to 40 V
● 150-mA Output Current Capability
● Very Low Output-Tracking Tolerance, ±4 mV
● 160-mV Low-Dropout Voltage When IOUT = 100 mA
● Low Quiescent Current (I(Q)):
● < 4 µA When ADJ = LOW
● 60 µA Typical at Light Load
● Extremely Wide ESR Range
● 10-µF to 500-µF Ceramic Output Capacitor
● ESR Range from 1 mΩ to 20 Ω
● Reverse Polarity Protection
● Current-Limit and Thermal-Shutdown Protection
● Output Short-Circuit-Proof to Ground and Supply
● Inductive Clamp at OUT Pin
● 8-Pin SO PowerPAD Package With Exposed Thermal Pad
