Protection and Light-Load Detection Reference Design for Antenna Modules
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Key Document


This reference design provides protection and diagnostics for antenna modules for use in automotive infotainment and navigation systems. This design is an alternate solution for antenna low-dropout linear regulators (LDOs) for the purpose of achieving lower ohmic drop (IR) while meeting the necessary protection measures such as short circuit, short-to-battery, reverse current, and overvoltage protection. The design also meets the subsystem-level diagnostic requirements such as precise light load and overload detection.

  • Open Load Detection at 10 mA (Typical)
  • Selectable Overcurrent Detection at 300 mA, 600 mA, 900 mA, 1.2 A
  • Shutoff in 1 μs (Typical) to Short-to-Battery Fault
  • Fast Response of 200 ns (Typical) to Short-to-Ground Fault
  • Low IR Drop With TPS25940-Q1 (42 mΩ RON)

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA211-Q1  AEC-Q100, 26V, bi-directional, high-precision current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM4040-N-Q1  Automotive, 100-ppm/°C precision micropower shunt voltage reference  Voltage references  Sample & Buy Not Available
TPS25940-Q1  2.7-V to 18-V, 42mΩ, 0.6-5.3A automotive eFuse with current monitor and short to battery pr  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS3710-Q1  Automotive, wide-VIN (18-V) voltage detector  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA211-Q1 Download Download
LM4040-N-Q1 Download Download
TPS25940-Q1 Download
TPS3710-Q1 Download -

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 5537 05 Sep 2017
Design files (6)
Title Type Size (KB) Date
ZIP 419 21 Nov 2017
ZIP 504 21 Nov 2017
PDF 503 21 Nov 2017
PDF 104 21 Nov 2017
PDF 50 21 Nov 2017
PDF 242 21 Nov 2017

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