MAX5943AEEE+

电流限制器/低压降ORing 开关控制器, 7.5 V至37 V输入, QSOP-16

The is a FireWire current limiter and low-drop ORing switch controller in 16 pin QSOP package. This device controls two external power n-channel MOSFETs to regulate current from the input power supply to the load and performs low voltage-drop, power-supply ORing. The MAX5943 FireWire/IEEE 1394 protective circuit is UL recognized. The MAX5943 allows the safe insertion and removal of FireWire peripherals into a live FireWire port by providing inrush current control and an output current-limiting function. The ORing feature provides a very efficient way to protect the FireWire port when connected to another FireWire peripheral that sources a higher voltage. By turning off both external MOSFETS, the MAX5943 provides a true bidirectional load disconnect. A low-current shutdown mode disables the MAX5943, resulting in less than 10µA supply current. A pin-selectable input allows latched or autoretry fault management after a fault.

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Supply voltage range is 7.5V to 37V

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Operating temperature range from -40°C to 85°C

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Low drop power ORing with ultra-fast turn-off

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±5% current limit sensing accuracy

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Provides inrush and output current limit

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ON/OFF control allows undervoltage lockout programming

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Programmable active current limit

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Fast current-limit response to output short circuit conditions