MAX5934A

Positive High-Voltage, Hot-Swap Controllers with Selectable Fault Management and Status Polarity

Data Sheet (Rev. 1)
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Overview

  • Provides Safe Hot Swap for +9V to +80V Power Supplies (MAX5934A)
  • Safe Board Insertion and Removal from a Live Backplane
  • Pin-Selectable Active-Low or Active-High Power-Good Output
  • Pin-Selectable Latched or Autoretry Fault Management
  • Programmable Foldback Current Limiting
  • High-Side Drive for an External n-Channel MOSFET
  • Built-In Thermal Shutdown
  • Undervoltage Lockout (UVLO)
  • Pin-Selectable Duty-Cycle Options (0.94%, 1.88%, 3.75%)

The MAX5934/MAX5934A are fully integrated hot-swap controllers for +9V to +80V (MAX5934A) positive supply rails. The MAX5934 is optimized for +33V to +80V power-supply rails. These devices allow for the safe insertion and removal of circuit cards into a live backplane without causing glitches on the backplane power-supply rail. The MAX5934/MAX5934A feature a programmable analog foldback current limit, programmable undervoltage lockout, and programmable output- voltage slew rate through an external n-channel MOSFET. In addition, if these devices remain in current limit for more than a programmable time, the external n-channel MOSFET latches off.

The MAX5934/MAX5934A feature pin-selectable PWRGD_ assertion polarity (active low or active high) and pin-selectable fault management (latched or autoretry). Other features include automatic restart after a circuit-breaker fault, selectable duty-cycle (DC) options, and thermal-shutdown mode for overtemperature protection.

The MAX5934/MAX5934A operate in the extended (-40°C to +85°C) temperature range and are available in a 16-pin QSOP package.

Applications

  • 24V/48V Industrial/Alarm Systems
  • Electronic Circuit Breakers
  • Hot Board Insertion
  • Industrial High-Side Switch/Circuit Breakers
  • Network Routers and Switches
MAX5934A
Positive High-Voltage, Hot-Swap Controllers with Selectable Fault Management and Status Polarity
MAX5934, MAX5934A: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Protection Switches & Controllers 3
MAX5932
PRODUCTION Positive High-Voltage, Hot-Swap Controller
MAX5933
NOT RECOMMENDED FOR NEW DESIGNS Positive High-Voltage, Hot-Swap Controllers
MAX5947
PRODUCTION Positive High-Voltage, Hot-Swap Controllers
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