MAX5933A

Positive High-Voltage, Hot-Swap Controllers

Data Sheet (Rev. 1)
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Overview

  • Pin- and Function-Compatible with the LT1641-2 (MAX5947B)
  • Provides Safe Hot Swap for +9V to +80V Power-Supply Range (MAX5947A/B/C)
  • Safe Board Insertion and Removal from Live Backplanes
  • Latched/Autoretry Management
  • Active-Low or Active-High Power-Good Output
  • Programmable Foldback Current Limiting
  • High-Side Drive for an External N-Channel MOSFET
  • Built-In Thermal Shutdown
  • Undervoltage Lockout (UVLO)
  • Overvoltage Protection
  • User-Programmable Supply Voltage Power-Up Rate

The MAX5933A-MAX5933F/MAX5947A/B/C fully integrated hot-swap controllers for +9V to +80V positive supply rails (MAX5947A/B/C), allow for the safe insertion and removal of circuit cards into live backplanes without causing glitches on the backplane power-supply rail. The MAX5947B is pin- and function-compatible with the LT1641-2. The other devices offer added features such as a choice of active-high or active-low power-good outputs (PWRGD/PWRGD-bar), latched/autoretry fault management, and autoretry duty-cycle options of 3.75% or 0.94% (see the Selector Guide).

The MAX5933A-MAX5933F are available with a default undervoltage lockout threshold of +31V and operate over a supply voltage range of +33V to +80V. The MAX5947A/B/C are available with a default undervoltage of +8.3V. All devices feature a programmable analog foldback current limit. If the device remains in current limit for more than a programmable time, the external n-channel MOSFET is either latched off (MAX5933A/MAX5933C/MAX5947A) or is set to automatically restart after a timeout delay (MAX5933B/MAX5933D/MAX5933E/MAX5933F/MAX5947B/MAX5947C).

The MAX5933_ and MAX5947_ operate in the extended temperature range of -40°C to +85°C. These devices are available in an 8-pin SO package.

Applications

  • 24V/48V Industrial/Alarm Systems
  • Electronic Circuit Breakers
  • Hot Board Insertion
  • Industrial High-Side Switch/Circuit Breakers
  • Network Routers and Switches
MAX5933A
Positive High-Voltage, Hot-Swap Controllers
MAX5933A, MAX5933B, MAX5933C, MAX5933D, MAX5933E, MAX5933F, MAX5947A, MAX5947B, MAX5947C: Functional Diagram
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Documentation

Data Sheet 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Protection Switches & Controllers 1
MAX5932
PRODUCTION Positive High-Voltage, Hot-Swap Controller
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • MAX5933A
  • MAX5933B
  • MAX5933C
  • MAX5933D
  • MAX5933E
  • MAX5933F
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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