4 Channel Antenna LDO Reference Design with Digital Diagnostics and Integrated Protection


Design files


This automotive reference design demonstrates an approach for powering remote, off-board loads, often over coaxial cables (i.e. "phantom power"). This design is capable of protecting against and digitally diagnosing different faults that off-board cabling is susceptible to. Reverse polarity, reverse current, short to-battery, short-to-ground, and thermal shutdown are protected against and diagnosed through I2C and a fault flag. The integrated reverse-current protection does not require an external diode at the output of the device, which saves cost and avoids increasing the dropout voltage.

  • 4.5V to 40V wide input voltage range and load dump of 45V
  • Multiplexing current sense between channels/devices to save ADC channels
  • High accuracy to detect antenna open, normal, over current, and short circuit conditions over current/short circuit
  • Digital window comparator with programmable high & low thresholds and alert
  • Output voltage adjustable 1.5 - 20V, output current up to 300 mA per channel
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDK3.PDF (1165 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components

TIDCEI0.ZIP (2064 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Linear & low-dropout (LDO) regulators

TPS7B7702-Q1Automotive 300-mA, off-battery (40-V), dual-channel adjustable antenna low-dropout voltage regulator

Data sheet: PDF | HTML
Precision ADCs

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Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Ref Design for Four-Channel Antenna LDO With Digital Diagnostics and Protection Dec. 04, 2017

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