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LTC4214-1 Datasheet(数据表) 1 Page - Linear Technology

部件型号  LTC4214-1
说明  Negative Low Voltage Hot Swap Controllers
下载  32 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
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LTC4214-1 Datasheet(HTML) 1 Page - Linear Technology

 
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LTC4214-1/LTC4214-2
1
421412f
TYPICAL APPLICATIO
APPLICATIO S
DESCRIPTIO
FEATURES
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.
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
s
ECL
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
Allows Safe Board Insertion and Removal from a
Live Backplane
s
Controls Supplies from 0V to –16V
s
Adjustable Analog Current Limit With Circuit
Breaker Timer
s
Fast Response Time Limits Peak Fault Current
s
Adjustable Soft-Start Current Limit
s
Adjustable Timer with Drain Voltage Accelerated
Response
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
Negative Low Voltage
Hot Swap Controllers
Hot Swap is a trademark of Linear Technology Corporation.
– 5.2V/5A ECL Supply Hot Swap Controller
Start-Up Behavior
GATE
5V/DIV
SENSE
20mV/DIV
VOUT
5V/DIV
PWRGD
5V/DIV
4214 TA02
4214 TA01
GND
3.3V
UV/OV
VEE
VIN
SENSE
SS
TIMER
GATE
PWRGD
LTC4214-1
34k
1%
10
470
2k
100nF
32.4k
1%
5.6nF
SMAJ7A
PUSH
RESET
3.3nF
10nF
–5.2V
0.01
IRF7413
GND
EN
–5.2V
ECL
10
1
9, 8
10
3
7
2
6
4
5
1nF
0.1
µF
CLOAD
100
µF
GND
(SHORT PIN)
+
BSS138
75k
22
DRAIN




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