Maxim MAX5943DEEE+

Overview

The MAX5943DEEE is a fully integrated power-management IC for FireWire applications. 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 MAX5943DEEE operates over a 7.5V to 37V input range and provides inrush and output current limit in addition to a diode ORing function suitable for FireWire applications. The MAX5943DEEE FireWire/IEEE 1394 protective circuit (Figure 12 of the full data sheet) is UL recognized. The MAX5943DEEE 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 MAX5943DEEE 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. The MAX5943A features a current-limit function that actively limits the current drawn by the load with a programmable timeout. The MAX5943B–MAX5943E do not actively limit the load current but provide a circuit-breaker function. See the Selector Guide in the full data sheet for the default and programmable circuit-breaker timeouts. The MAX5943DEEE operates over the -40°C to +85°C extended temperature range and is available in a 16-pin QSOP package.

Features

Applications

• MP3 Players
• Active OR-ing of Redundant (N+1) Power Supplies
• Automotive battery protection
• ADAS domain controller
• Camera ECU
• Head Unit
• USB HUBs
• Active ORing for redundant power
• Factory automation and control - PLC digital output modules
• Industrial motor drives