●For automotive off-board sensors and small 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 consistent power supply as onboard components to secure high accuracy of data acquisition.
●The TPS7B4253-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 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 reverse polarity condition. The TPS7B4253-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 to 45-V Wide Input-Voltage Range (Maximum)
● Output Voltage Adjusts Down to:
● 1.5 to 40 V (HTSSOP)
● 2 to 40 V (SO PowerPAD™)
● 300-mA Output Current Capability
● Very-Low Output Tracking Tolerance, ±4 mV
● 320-mV Low Dropout Voltage when IOUT = 200 mA
● Separate Pins for Enable and Tracking Inputs (HTSSOP only)
● Low Quiescent Current (IQ):
● < 4 µA when EN = LOW
● 60 µA (Typical) at Light Loads
● Extremely Wide ESR Range.
● Stable With 10- to 500-µF Ceramic Output Capacitor, ESR 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
● Available in the Following Packages:
● 8-Pin SO PowerPAD Package
● 20-Pin HTSSOP Package
