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MAX16913, MAX16913A：Remote Antenna Current-Sense Amplifier and Switches

Precision Current-Sense Amplifier and Integrated High-Voltage Switches Protect Phantom Power to Automotive LNA

The MAX16913/MAX16913A high-voltage high-side current-sense switches feature internal current limiting to prevent system damage due to fault conditions. The MAX16913/MAX16913A input voltage range extends from 5V to 18V, making them ideal for providing phantom power to remote radio-frequency low-noise amplifiers (LNAs) in automotive applications. The MAX16913/MAX16913A monitor the load current and provide an analog output voltage proportional to the sensed load current. In addition to current sensing, accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. Two open-drain fault indicator outputs notify the microprocessor when a short circuit, an open-load condition, or a short-to-battery condition exists. For the MAX16913A, the open-load threshold is externally adjustable using a resistive divider. A fault-blanking feature enables the circuit to ignore momentary faults, such as those caused by the initial charging of a capacitive load when hot swapping, preventing false alarms to the system. Built-in thermal-overload protection turns off the switch when the die temperature exceeds +150°C (min). The MAX16913/MAX16913A also feature a short-to-battery detection every time the internal switch turns on. These devices provide an active-high control input to put the devices in low-power shutdown mode. The MAX16913/MAX16913A are available in the 16-pin QSOP package and operate over the -40°C to +105°C temperature range.

Key Features Switch Phantom Power-On/-Off Under µC Control Analog Current Measurement Output Adjustable Current Limiting (340mA Maximum) Detect Open-Load and Short-Circuit Conditions Provide Open-Drain Fault Signals (Active-Low SC and Active-Low OL) Overcurrent Blanking During Startup Thermal Shutdown AEC-Q100 Qualified (/V Versions Only) -40°C to +105°C Operating Temperature Range

MAX16913, MAX16913A: Functional Diagrams Applications/Uses Automotive Safety and Infotainment Remote LNA Phantom Power

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Design kits & evaluation modules

• MAX16913AEVKIT

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