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Positive High-Voltage, Hot-Swap Controllers

Product Details

Key Features

Parametric specs for Hot Swap Controllers
VIN (V) (min) 9
VIN (V) (max) 80
# Channels 1
Circuit Breaker/ Current Limit Current Limit
Fault Condition Control Latched Off
Periodic Retry
Positive/Negative Rail Positive
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.9
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Simplified Block Diagram

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Parameters

Parametric specs for Hot Swap Controllers
VIN (V) (min) 9
VIN (V) (max) 80
# Channels 1
Circuit Breaker/ Current Limit Current Limit
Fault Condition Control Latched Off
Periodic Retry
Positive/Negative Rail Positive
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
2.9

Key Features

  • 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

Applications/Uses

  • 24V/48V Industrial/Alarm Systems
  • Electronic Circuit Breakers
  • Hot Board Insertion
  • Industrial High-Side Switch/Circuit Breakers
  • Network Routers and Switches

Description

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.

Simplified Block Diagram

MAX5933A, MAX5933B, MAX5933C, MAX5933D, MAX5933E, MAX5933F, MAX5947A, MAX5947B, MAX5947C: Functional Diagram MAX5933A, MAX5933B, MAX5933C, MAX5933D, MAX5933E, MAX5933F, MAX5947A, MAX5947B, MAX5947C: Functional Diagram 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 .