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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 920kB) Download   E-Mail

Description

The MAX5938 is a hot-swap controller for -10V to -80V rails. The MAX5938 allows circuit line cards to be safely hot-plugged into a live backplane without causing a glitch on the power supply. It integrates an adjustable circuit-breaker function requiring no RSENSE. The MAX5938 provides a controlled turn-on for circuit cards, which limits inrush current and prevents both glitches on the power-supply rail and damage to board connectors and components. Before startup, the MAX5938 performs a Load Probe™ test to detect the presence of a short-circuit condition. If a short-circuit condition does not exist, the device limits the inrush current drawn by the load by gradually turning on the external MOSFET. Once the external MOSFET is fully enhanced, the MAX5938 provides overcurrent and shortcircuit protection by monitoring the voltage drop across the RDS(ON) of the external power MOSFET. The MAX5938 integrates a 400mA fast GATE pulldown to guarantee that the external MOSFET is rapidly turned off in the event of an overcurrent or short-circuit condition. The MAX5938 also protects the system against input voltage (VIN) steps. During an input voltage step, the device limits the current drawn by the load to a safe level without shutting down the load. The device also includes ON/OFF control, selectable PGOOD output polarity, undervoltage (UV) and overvoltage (OV) protection. The device offers latched (MAX5938L) or autoretry (MAX5938A) fault management. Both the MAX5938A and MAX5938L are available in a 16-pin QSOP package and are specified for the extended (-40°C to +85°C) temperature range.

Key Features		Applications/Uses
-10V to -80V Operation No External RSENSE Required Drives Large Power MOSFETS Eliminates Inrush Current Spikes During Hot Plug into Powered Backplane Eliminates Inrush Current Spikes and Dropping of Load During Large VIN Steps Adjustable Circuit-Breaker Threshold with Temperature Compensation Circuit-Breaker Fault with Transient Rejection Shorted Load Detection (Load Probe) Before Power MOSFET Turn-On Programmable Load-Voltage Slew Rate Controls Inrush Current ±2.4% Accuracy, Programmable Turn-On/Off Voltage (UVLO) Overvoltage Fault Protection with Transient Rejection Autoretry and Latched Fault Management Available Low Quiescent Current (1mA)		Network Hubs, Switches, Routers Network Hubs, Switches, Routers Servers Solid-State Circuit Breakers Telecom Line Cards

Diagram

Typical Operating Circuit

Reliability Reports

Show FIT data for: MAX5938 Request Reliability Report for: MAX5938

Software/Models

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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: 1-8 of 8

MAX5938	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX5938AEEE			Active	QSOP;16 pin;31 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
MAX5938AEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5938LEEE			Active	QSOP;16 pin;31 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
MAX5938LEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5938AEEE+			Active	QSOP;16 pin;31 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
MAX5938AEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX5938LEEE+			Active	QSOP;16 pin;31 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
MAX5938LEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

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