LTC4216
1
4216fa
For more information www.linear.com/LTC4216
Typical applicaTion
SENSEP SENSEN GATE
V
CC
ON
TIMER
FB
FAULT
RESET
FAULT
RESET
SS
FILTER
LTC4216
330nF
20k
1%
17.4k
1%
10k
10k
1%
15k
1%
LONG
BACKPLANE
CONNECTOR
(FEMALE)
PCB EDGE
CONNECTOR
(MALE)
GND
LONG
SHORT
10nF
10nF
18nF
V
OUT
1.8V
5A
V
IN
1.8V
V
CC
3.3V
GND
Si4864DY
0.004
22
3.3V
10k
+
1000礔
礟
LOGIC
4216 TA01
LONG
4216 TA01b
0.5ms/DIV
V
GATE
5V/DIV
I
OUT
2.5A/DIV
V
OUT
1V/DIV
FeaTures
DescripTion
Ultralow Voltage
Hot Swap Controller
applicaTions
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
n
Allows Safe Board Insertion and Removal from
a Live Backplane
n
Controls Load Voltages from 0V to 6V
n
Fast Response Limits Peak Fault Current
n
Adjustable Analog Current Limit
n
Adjustable Soft-Start with Inrush Current Limiting
n
Adjustable Response Time for Overcurrent
Protection
n
Low Circuit Breaker Trip Threshold: 25mV
n
No External Gate Capacitor Required
n
Internal Charge Pump for N-Channel MOSFET
n
Adjustable Output Power-Up Rate
n
RESET and FAULT Output
n
10-Lead MSOP and 12-Lead (4mm ?3mm) DFN
Packages
The LTC
?/DIV>
4216 is a positive low voltage Hot Swap
"
controller
that allows a board to be safely inserted and removed from
a live backplane. It controls load voltages ranging from
0V to 6V and isolates a severe fault with instantaneous
analog current limiting.
An internal high side switch driver controls the gate of
an external N-channel MOSFET. An adjustable soft-start
limits the rate of change of the inrush current at start-up
for a large load capacitor. Together with an analog current
limit amplifier, an electronic circuit breaker with adjustable
response time provides dual level overcurrent protection.
No external gate capacitor is required for the analog cur-
rent limit loop compensation.
The FB pin monitors the output supply voltage and signals
the RESET output pin. An ON pin provides on/off control
and a FAULT pin indicates the fault status. The LTC4216
is available in the 10-lead MSOP and 12-lead (4mm ?
3mm) DFN packages.
n
Electronic Circuit Breaker
n
Live Board Insertion and Removal
n
Industrial High Side Switch/Circuit Breaker
n
Optical Networking
Single Channel 1.8V Hot Swap Controller
Normal Power-Up
with Soft-Start
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