MAX5943EEEE+ by Analog Devices

FireWire Current Limiter and Low-Drop ORing Switch Controller

Status: Active
Series: MAX5943
RoHS: Unknown
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The MAX5943 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 MAX5943 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 MAX5943 FireWire/IEEE 1394™ protective circuit (Figure 12 of the full data sheet) 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. 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 MAX5943 operates over the -40°C to +85°C extended temperature range and is available in a 16-pin QSOP package.

Prices starting from US$3.00


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Logo for Newark Electronics Newark Electronics US$3.61
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Features

Provides Safe Hot Swap for 7.5V to 37V Power Supplies
UL-Recognized FireWire/IEEE 1394 Protective Circuit
Low-Drop Power ORing with Ultra-Fast Turn-Off
Programmable Active Current Limit (MAX5943A)
Programmable Circuit Breaker (MAX5943B–MAX5943E)
±5% Current-Limit Sensing Accuracy
Programmable Current-Limit/Circuit-Breaker Timeout
Fast Current-Limit Response to Output Short-Circuit Conditions (MAX5943A)
Drives External n-Channel Power MOSFETs
Overcurrent Fault Status Output
Latched or Autoretry Overcurrent Fault Management
10µA Shutdown Current
ON/OFF Control Allows Undervoltage Lockout Programming
Fast Load Disconnect Control Through ON Input

Specifications

Reverse Current Protect. Yes
Under Voltage Protect Yes
Charge Pump Cap. No
Soft Start Yes
Enable Yes
Fault Indicator Yes
Package/Pins QSOP/16


MAX5943EEEE+ Semiconductors - ICs by Analog Devices

HOT-SWAP CONTROLLER 37V QSOP-16

Status: Unknown
Series: -
RoHS: Unknown
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Specifications

Controller Applications FireWire Desktop/Notebook Port FireWire Peripheral Device Current Limit FireWire Hub Hot Swap
Input Voltage -
Supply Voltage Min 7.5V
Supply Voltage Max 37V
Controller IC Case Style QSOP
No. of Pins 16Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

HOT-SWAP CONTROLLER, 37V, QSOP-16 | Farnell
Hot-Swap Controller, 37V, Qsop-16 | Newark Electronics

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Is the MAX5943EEEE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Farnell, Newark Electronics and element14 have stock available or on a lead time for MAX5943EEEE+ .

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