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Current-Regulating Hot-Swap Controller with DualSpeed/BiLevel Fault Protection

Product Details

Key Features

Applications/Uses

Parametric specs for Hot Swap Controllers
VIN (V) (min) 2.7
VIN (V) (max) 13.2
# Channels 1
Circuit Breaker/ Current Limit Current Limit
Circuit Breaker/Current Limit Threshold (mV) 50
Fault Condition Control Latched Off
Positive/Negative Rail Positive
Features DualSpeed/BiLevel Current Limit
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
3.41
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Hot Swap Controllers
VIN (V) (min) 2.7
VIN (V) (max) 13.2
# Channels 1
Circuit Breaker/ Current Limit Current Limit
Circuit Breaker/Current Limit Threshold (mV) 50
Fault Condition Control Latched Off
Positive/Negative Rail Positive
Features DualSpeed/BiLevel Current Limit
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
3.41

Key Features

  • 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

Applications/Uses

  • Hot Board Insertion
  • Solid-State Circuit Breakers

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.

Simplified Block Diagram

MAX4370: Typical Operating Circuit MAX4370: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .