●The TPS7B770x-Q1 family of devices is a single and dual high-voltage LDO with current sensing designed to operate with a wide input-voltage range from 4.5 to 40 V (45-V load dump protection). The device provides power to the low-noise amplifiers of the active antenna through a coax cable with 300 mA per channel current. Each channel also provides an adjustable output voltage from 1.5 to 20 V.
●The device provides diagnostics through the current sense and error pins. To monitor the load current, a high-side current-sense circuitry provides a proportional analog output to the sensed load current. The accurate current sense allows detection of open, normal, and short-circuit conditions without the need for further calibration. Current sense can be multiplexed between channels and devices to save ADC resources. Each channel also implements adjustable current limit with an external resistor.
●The integrated reverse polarity diode eliminates the need for an external diode. The device features standard thermal shutdown, short-to-battery protection on the output, and reverse current protection.
●Each channel has internal inductive clamp protection on the output during inductive switch off. The device operates during –40°C to 125°C ambient temperature range.
●For all available packages, see the orderable addendum at the end of the data sheet.
● 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 2
● Device CDM ESD Classification C4B
● Single and Dual-Channel LDO With Current Sense and Adjustable Current-Limit
● 4.5- to 40-V Wide Input Voltage Range, 45-V Load Dump
● Power Switch Mode When Tying FB to GND
● 1.5- to 20-V Adjustable Output Voltage
● Up to 300-mA Output Current per Channel
● Adjustable Current-Limit With External Resistor
● High Accuracy Current-Sense to Detect Antenna Open Condition at Low Current Without Further Calibration
● High Power-Supply Rejection Ratio: Typical 73 dB at 100 Hz
● Integrated Reverse-Polarity Protection, Down to –40 V and No Need for External Diode
● 500-mV maximum Dropout Voltage at 100-mA Load
● Stable With Output Capacitor in 2.2 to 100-µF Range (ESR 1 mΩ to 5 Ω)
● Integrated Protection and Diagnostics
● Thermal Shutdown
● Undervoltage Lock Out
● Short Circuit Protection
● Reverse Battery Polarity Protection
● Reverse Current Protection
● Output Short-to-Battery Protection
● Output Inductive Load Clamp
● Multiplexing Current Sense Between Channels and Devices
● Ability to Distinguish all Faults With Current Sense
● 16-Pin HTSSOP PowerPad Package
●All trademarks are the property of their respective owners.
