LTC4218CGN-TRPBF(RevB) Ver la hoja de datos (PDF) - Linear Technology
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LTC4218CGN-TRPBF Datasheet PDF : 16 Pages
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LTC4218
Hot Swap Controller
FEATURES
■ Wide Operating Voltage Range: 2.9V to 26.5V
■ Adjustable, 5% Accurate (15mV) Current Limit
■ Current Monitor Output
■ Adjustable Current Limit Timer Before Fault
■ Powergood and Fault Outputs
■ Adjustable Inrush Current Control
■ 2% Accurate Undervoltage and Overvoltage
Protection
■ Available in 16-Lead SSOP and 16-Pin 5mm × 3mm
DFN Packages
APPLICATIONS
■ RAID Systems
■ ATCA, AMC, μTCA Systems
■ Server I/O Cards
■ Industrial
DESCRIPTION
The LTC®4218 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 from 2.9V
to 26.5V. A dedicated 12V version (LTC4218-12) contains
preset 12V specific thresholds, while the standard LTC4218
allows adjustable thresholds.
The LTC4218 provides an accurate (5%) current limit with
current foldback limiting. The current limit threshold can
be adjusted dynamically using an external pin. Additional
features include a current monitor output that amplifies
the sense voltage for ground referenced current sensing.
Overvoltage, undervoltage and powergood monitoring
are also provided.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
12V, 6A Card Resident Application
2mΩ
Si7108DN
12V
10Ω
VOUT
12V
+ 6A
330μF
AUTO
RETRY
0.1μF
0.1μF
SENSE– GATE SOURCE
SENSE+
VDD
UV
LTC4218DHC-12
12V
10k
FLT
PG
1k
0.01μF
TIMER
INTVCC
GND
IMON
20k
ADC
4218 TA01a
VIN
10V/DIV
IIN
1A/DIV
VOUT
10V/DIV
PG
10V/DIV
Power-Up Waveform
25ms/DIV
4218 TA01b
4218fb
1
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