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LTC4211

Linear Technology
Part Number LTC4211
Manufacturer Linear Technology
Description Hot Swap Controller
Published Sep 21, 2009
Detailed Description LTC4211 Hot Swap Controller with Multifunction Current Control FEATURES n Allows Safe Board Insertion and Removal from ...
Datasheet PDF File LTC4211 PDF File

LTC4211
LTC4211

Overview
LTC4211 Hot Swap Controller with Multifunction Current Control FEATURES n Allows Safe Board Insertion and Removal from a Live Backplane n Controls Supply Voltages from 2.
5V to 16.
5V n Programmable Soft-Start with Inrush Current Limiting, No External Gate Capacitor Required n Faster Turn-Off Time Because No External Gate Capacitor is Required n Dual Level Overcurrent Fault Protection n Programmable Response Time for Overcurrent Protection (MS) n Programmable Overvoltage Protection (MS) n Automatic Retry or Latched Mode Operation (MS) n High Side Drive for an External N-Channel FET n User-Programmable Supply Voltage Power-Up Rate n FB Pin Monitors VOUT and Signals RESET n Glitch Filter Protects Against Spurious RESET Signal APPLICATIONS n Electronic Circuit Breaker n Hot Board Insertion and Removal (Either On Backplane or On Removable Card) n Industrial High Side Switch/Circuit Breaker DESCRIPTION The LTC®4211 is a hot swap controller that allows a board to be safely inserted and removed from a live backplane.
An internal high side switch driver controls the gate of an external N-channel MOSFET for supply voltages ranging from 2.
5V to 16.
5V.
The LTC4211 provides soft-start and inrush current limiting during the start-up period which has a programmable duration.
Two on-chip current limit comparators provide dual level overcurrent circuit breaker protection.
The slow comparator trips at VCC – 50mV and activates in 20µs (or is programmed by an external filter capacitor, MS only).
The fast comparator trips at VCC – 150mV and typically responds in 300ns.
The FB pin monitors the output supply voltage and signals the RESET output pin.
The ON pin signal turns the chip on and off and can also be used for the reset function.
The MS package has FAULT and FILTER pins to provide additional functions like fault indication, autoretry or latch-off modes, programmable current limit response time and programmable overvoltage protection using an external Zener diode clamp.
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