s Allows Safe Board Insertion and Removal from a
s Controls Supplies from 0V to –16V
s Adjustable Analog Current Limit With Circuit
s Fast Response Time Limits Peak Fault Current
s Adjustable Soft-Start Current Limit
s Adjustable Timer with Drain Voltage Accelerated
s Adjustable Undervoltage/Overvoltage Protection
s LTC4214-1: Latch Off After Fault
s LTC4214-2: Automatic Retry After Fault
s Available in the 10-Pin MSOP Package
s Hot Board Insertion
s Electronic Circuit Breaker
s Negative Power Supply Control
s Central Office Switching
s High Availability Servers
s Disk Arrays
s Optical Networking/Switching
Negative Low Voltage
Hot Swap Controllers
The LTC®4214 negative voltage Hot SwapTM controller
allows a board to be safely inserted and removed from a
live backplane. Output current is controlled by three stages
of current limiting: a timed circuit breaker, active current
limiting and a fast feedforward path that limits peak
current under worst-case catastrophic fault conditions.
Adjustable undervoltage and overvoltage detectors dis-
connect the load whenever the input supply exceeds the
desired operating range. The LTC4214 controls negative
supplies ranging from near zero to –16V. A multifunction
timer delays initial start-up and controls the circuit breaker’s
response time. This response time is accelerated by
sensing excessive MOSFET drain voltage, keeping the
MOSFET within its safe operating area (SOA). An adjust-
able soft-start circuit controls MOSFET inrush current at
start-up. A power good status output can enable a power
module at start-up or disable it if the circuit breaker trips.
The LTC4214-1 latches off after a circuit breaker fault times
out. The LTC4214-2 provides automatic retry after a fault.
The LTC4214 is available in the 10-pin MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
– 5.2V/5A ECL Supply Hot Swap Controller
9, 8 UV/OV