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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 412kB) Download   E-Mail

Description

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.

An evaluation kit is available:  MAX5943AEVKIT  

Key Features		Applications/Uses
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		FireWire® Desktop/Notebook Port FireWire® Hub FireWire® Peripheral Device Current Limit Hot Swap

Diagram

Typical Operating Circuit

Application Notes

Application Note 3605: Power-Supply Management Solution for PCI Express x16 Graphics 150W-ATX Add-In Cards - MAX5943 Application Note 3984: UL Recognized, IEEE 1394 Single- and Dual-Port FireWire Protective Circuits - MAX5943

Evaluation Kits

MAX5943AEVKIT

Reliability Reports

Show FIT data for: MAX5943 Request Reliability Report for: MAX5943

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-20 of 20

MAX5943	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5943AEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5943AEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943BEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5943BEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943CEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5943CEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943DEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5943DEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943EEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX5943EEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943AEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943AEEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943BEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943BEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943CEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943CEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943DEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943DEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5943EEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX5943EEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

More Information

New Product Press Release 2004-09-14

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