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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 240kB) Download   E-Mail

Description

The MAX4370 is a circuit-breaker IC designed to offer protection in hot-swap applications using Maxim's DualSpeed/BiLevel™ detection. This controller, designed to reside either on the backplane or on the removable card, is used to protect a system from start-up damage when a card or board is inserted into a rack with the main system power supply turned on. The card's discharged filter capacitors provide a low impedance that can momentarily cause the main power supply to collapse. The MAX4370 prevents this start-up condition by providing inrush current regulation during a programmable start-up period, allowing the system to stabilize safely. In addition, two on-chip comparators provide DualSpeed/BiLevel short-circuit protection and overcurrent protection during normal operation. The MAX4370 provides protection for a +3V to +12V single supply. An internal charge pump generates the controlled gate drive for an external N-channel MOSFET power switch. The MAX4370 latches the switch off after a fault condition until an external reset signal clears the device. Other features include a status pin to indicate a fault condition, an adjustable overcurrent response time, and a power-on reset comparator. The MAX4370 is specified for the extended-industrial temperature range (-40°C to +85°C) and is available in an 8-pin SO package.

Key Features		Applications/Uses
DualSpeed/BiLevel Protection During Normal Operation Inrush Current Regulated at Start-Up Resides Either on the Backplane or on the Removable Card Programmable Start-Up Period and Response Time Allows Safe Board Insertion and Removal from Live Backplane Protection for +3V to +12V Single Supplies Latched Off After Fault Condition Status Output Pin Internal Charge Pump Generates Gate Drive for External N-Channel MOSFET		Hot Board Insertion Solid-State Circuit Breakers

Diagram

Typical Operating Circuit

Application Notes

Application Note 1785: Flexible Hot-Swap Current Limiter Allows Thermal Protection - max4370 Application Note 2378: Handy Circuit Gives Systems Flexible Fault Protection - MAX4370 Application Note 2765: Flexible Fault Protection - MAX4370

Design Guides

Amplifiers and Sensors (PDF)

Reliability Reports

Show FIT data for: MAX4370 Request Reliability Report for: MAX4370

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: 1-4 of 4

MAX4370	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX4370ESA			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX4370ESA-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX4370ESA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX4370ESA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 1999-05-21

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