MAX5920

-48V Hot-Swap Controller with External RSENSE

Hot-Swap Controller with External RSENSE Well-Suited for -48V Power Systems
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Status Explanations for product status codes

Active: In Production.

Description

The MAX5920A/MAX5920B are hot-swap controllers that allow a circuit card to be safely hot plugged into a live backplane. The MAX5920A/MAX5920B operate from -20V to -80V and are well-suited for -48V power systems. These devices are pin and function compatible with the LT4250 and pin compatible with the LT1640.

The MAX5920A/MAX5920B provide a controlled turn-on to circuit cards preventing glitches on the power-supply rail and damage to board connectors and components. The MAX5920A/MAX5920B provide undervoltage, overvoltage, and overcurrent protection. These devices ensure the input voltage is stable and within tolerance before applying power to the load.

Both the MAX5920A and MAX5920B protect a system against overcurrent and short-circuit conditions by turning off the external MOSFET in the event of a fault condition. The MAX5920A/MAX5920B also provide protection against input voltage steps. During an input voltage step, the MAX5920A/MAX5920B limit the current drawn by the load to a safe level without turning off power to the load.

Both devices feature an open-drain power-good status output (active-low PWRGD for the MAX5920A or PWRGD for the MAX5920B) that can be used to enable downstream converters. A built-in thermal-shutdown feature is also included to protect the external MOSFET in case of overheating.

The MAX5920A/MAX5920B are available in an 8-pin SO package. Both devices are specified for the extended -40°C to +85°C temperature range.

Data Sheet

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Key Features

  • Allows Safe Board Insertion and Removal from a Live -48V Backplane
  • Pin- and Function-Compatible with LT4250L (MAX5920A)
  • Pin-Compatible with LT1640L (MAX5920A)
  • Pin- and Function-Compatible with LT4250H (MAX5920B)
  • Pin-Compatible with LT1640H (MAX5920B)
  • Circuit-Breaker Immunity to Input Voltage Steps and Current Spikes
  • Withstands -100V Input Transients with No External Components
  • Programmable Inrush and Short-Circuit Current Limits
  • Operates from -20V to -80V
  • Programmable Overvoltage Protection
  • Programmable Undervoltage Lockout
  • Powers Up into a Shorted Load
  • Power-Good Control Output
  • Thermal Shutdown Protects External MOSFET
 

Applications/Uses

  • Base-Station Line Cards
  • Central-Office Line Cards
  • Network Routers and Switches
  • Server Line Cards
  • Telecom Line Cards
   

Key Specifications:

Hot Swap Controllers
Part Number VIN
(V)
VIN
(V)
Circuit Breaker/ Current Limit Circuit Breaker/Current Limit Threshold
(mV)
Fault Condition Control Channels Positive/Negative Rail Features Budgetary
Price
min max See Notes
MAX5920  -20 -80 Current Limit 50 Latched Off 1 Negative Undervoltage/Overvoltage Protection $2.12 @1k
See All Hot Swap Controllers (63)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX5920: Typical Operating Circuit
Typical Operating Circuit

Technical Documents

App Note 4033  Programmable Fan Controllers

Reliability Reports

Reliability Report: MAX5920.pdf
Show FIT data for:

Software/Models

MAX5920A PSPICE Macromodel
MAX5920B PSPICE Macromodel

Ordering Information

Filters: Part Number Package: Temperature: Tape and Reel Sample
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX5920AESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920AESA+  
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5920AESA+T    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5920AESA-T    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920BESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920BESA+  
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5920BESA+T    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
MAX5920BESA-T    
Active N.SO;8 pin
-40°C to +85°C See data sheet
MAX5920CESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920CESA+    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: Lead Free
Materials Analysis
Part Number Free
Sample
Buy Status Explanations for product status codes Package:
TYPE PINS FOOTPRINT
DRAWING  CODE/VAR *
Temp RoHS/Lead-Free?
Materials Analysis
MAX5920CESA+T    
Active N.SO;
-40°C to +85°C See data sheet
MAX5920CESA-T    
Active N.SO;
-40°C to +85°C See data sheet
MAX5920DESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920DESA-T    
Active N.SO;
-40°C to +85°C See data sheet
MAX5920EESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920EESA-T    
Active N.SO;8 pin
-40°C to +85°C See data sheet
MAX5920FESA    
Active SOIC(N);8 pin;30.9 mm²
-40°C to +85°C RoHS/Lead-Free: No
Materials Analysis
MAX5920FESA-T    
Active N.SO;8 pin
-40°C to +85°C See data sheet

Notes:
  1. Other options and links for purchasing parts are listed at: http://www.maximintegrated.com/sales.
  2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
  3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
  4. * 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.

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More Information

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Information Index

Document Ref.: 19-2931 Rev 0; 2003-09-17
This page last modified: 2009-10-08