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The LTC®4211 is a Hot SwapTM 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 softstart 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 20ms (or 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.
LTC4211IMS8 Maximum Ratings
Supply Voltage (VCC) ..............................................................17V Input Voltage FB, ON ..............................................................0.3V to 17V SENSE, FILTER ........................................... 0.3V to VCC + 0.3V TIMER ........................................................................0.3V to 2V Output Voltage GATE .............................................Internally Limited (Note 3) RESET, FAULT ....................................................0.3V to 17V Operating Temperature Range LTC4211C .........................................................0°C to 70°C LTC4211I......................................................40°C to 85°C Storage Temperature Range ............................65°C to 150°C Lead Temperature (Soldering, 10 sec).............................. 300°C
LTC4211IMS8 Features
Allows Safe Board Insertion and Removal from a Live Backplane Controls Supply Voltages from 2.5V to 16.5V Programmable Soft-Start with Inrush Current Limiting, No External Gate Capacitor Required Faster Turn-Off Time Because No External Gate Capacitor is Required Dual Level Overcurrent Fault Protection Programmable Response Time for Overcurrent Protection (MS) Programmable Overvoltage Protection (MS) Automatic Retry or Latched Mode Operation (MS) High Side Drive for an External N-Channel FET User-Programmable Supply Voltage Power-Up Rate FB Pin Monitors VOUT and Signals RESET Glitch Filter Protects Against Spurious RESET Signal
LTC4211IMS8 Typical Application
Electronic Circuit Breaker Hot Board Insertion and Removal (Either On Backplane or On Removable Card) Industrial High Side Switch/Circuit Breaker
LTC4211IMS8 Connection Diagram
LTC4211IS8 Parameters
Technical/Catalog Information
LTC4211IS8
Vendor
Linear Technology
Category
Integrated Circuits (ICs)
Applications
General Purpose
Type
Hot-Swap Controller
Package / Case
8-SOIC (3.9mm Width)
Packaging
Tube
Current Limit
-
Internal Switch(s)
No
Operating Temperature
-40°C ~ 85°C
Voltage - Supply
2.5 V ~ 16.5 V
Drawing Number
161; 05-08-1610; S; 8
Lead Free Status
Contains Lead
RoHS Status
RoHS Non-Compliant
Other Names
LTC4211IS8 LTC4211IS8
LTC4211IS8 General Description
The LTC®4211 is a Hot SwapTM 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 softstart 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 20ms (or 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.
LTC4211IS8 Maximum Ratings
Supply Voltage (VCC) ..............................................................17V Input Voltage FB, ON ..............................................................0.3V to 17V SENSE, FILTER ........................................... 0.3V to VCC + 0.3V TIMER ........................................................................0.3V to 2V Output Voltage GATE .............................................Internally Limited (Note 3) RESET, FAULT ....................................................0.3V to 17V Operating Temperature Range LTC4211C .........................................................0°C to 70°C LTC4211I......................................................40°C to 85°C Storage Temperature Range ............................65°C to 150°C Lead Temperature (Soldering, 10 sec).............................. 300°C
LTC4211IS8 Features
Allows Safe Board Insertion and Removal from a Live Backplane Controls Supply Voltages from 2.5V to 16.5V Programmable Soft-Start with Inrush Current Limiting, No External Gate Capacitor Required Faster Turn-Off Time Because No External Gate Capacitor is Required Dual Level Overcurrent Fault Protection Programmable Response Time for Overcurrent Protection (MS) Programmable Overvoltage Protection (MS) Automatic Retry or Latched Mode Operation (MS) High Side Drive for an External N-Channel FET User-Programmable Supply Voltage Power-Up Rate FB Pin Monitors VOUT and Signals RESET Glitch Filter Protects Against Spurious RESET Signal
LTC4211IS8 Typical Application
Electronic Circuit Breaker Hot Board Insertion and Removal (Either On Backplane or On Removable Card) Industrial High Side Switch/Circuit Breaker