MAX5944ESE+ by Analog Devices

Dual FireWire Current Limiter and Low-Drop ORing Switch Controller


The MAX5944 is a dual, current limiter/low-drop ORing, switch controller power-management IC for FireWire® applications. Each independent channel controls two external power MOSFETs to regulate current from the input power supply to the load and performs low-voltagedrop power-supply ORing. The MAX5944 operates over the 7.5V to 37V input range and provides inrush and output current limit in addition to diode ORing functions suitable for FireWire applications. The MAX5944 allows the safe insertion and removal of FireWire peripherals into a live FireWire port by providing inrush current control and output current-limiting functions. The MAX5944 features a current-limit function that actively limits the current drawn by the load with a 2ms timeout. Its autoretry function then automatically restarts after the 259ms autoretry delay time. 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 the external MOSFETS, the MAX5944 provides a true bidirectional load disconnect. Each channel has an independent ON/OFF control that results in less than 10µA supply current per channel. The MAX5944 operates over the -40°C to +125°C extended temperature range and is available in a 16-pin SO package.

Where to Buy

Prices starting from US$5.30

Distributor Stock
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Farnell
from US$7.99
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Analog Devices
from US$5.30
118
in stock
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element14
from US$5.57
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Newark Electronics
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Features

Provides Safe Hot-Swap for 7.5V to 37V Power Supplies
Dual-Channel Hot-Swap
Low-Drop Power ORing with Ultra-Fast Turn-Off
Active Current Limit
±5% Current-Limit Sensing Accuracy
2ms Current-Limit Timeout
Fast Current-Limit Response to Output Short-Circuit Conditions
Drives External n-Channel Power MOSFETs
Independent Overcurrent Fault Status Outputs
259ms Autoretry Period
10µA (Per Channel) Shutdown Current
Independent ON/OFF Control Allows Undervoltage Lockout Programming
Fast Load Disconnect Control Through ON/OFF Inputs
Bidirectional Load Disconnect
Power Routing from One Port to Another

Specifications

Reverse Current Protect. Yes
Under Voltage Protect Yes
Charge Pump Cap. No
Soft Start Yes
Enable Yes
Fault Indicator Yes
Package/Pins SOIC (N) HYBRID/16


MAX5944ESE+ - Integrated Circuits by Analog Devices

CURRENT LIMITER/ORING SW CTRL NSOIC-16

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function Current Limiter / Low Drop ORing Switch Controller
Supply Voltage Min 7.5V
Supply Voltage Max 37V
IC Package Type NSOIC
No. of Pins 16Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Dual FireWire Current Limiter | Analog Devices
CURRENT LIMITER/ORING SW CTRL, NSOIC-16 | Farnell
Current Limiter/Oring Sw Ctrl, Nsoic-16 | Newark Electronics

Frequently Asked Questions

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Is the MAX5944ESE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX5944ESE+ have stock available?

Authorised distributors including Analog Devices, element14, Farnell and Newark Electronics have stock available or on a lead time for MAX5944ESE+ .

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