LTC4218IGN-PBF Ver la hoja de datos (PDF) - Linear Technology
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LTC4218IGN-PBF Datasheet PDF : 18 Pages
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LTC4218
Hot Swap Controller
Features
n Wide Operating Voltage Range: 2.9V to 26.5V
n Adjustable, 5% Accurate 15mV Current Limit
n Current Monitor Output
n Adjustable Current Limit Timer Before Fault
n Power Good and Fault Outputs
n Adjustable Inrush Current Control
n 2% Accurate Undervoltage and Overvoltage
Protection
n Available in 16-Lead SSOP and 16-Pin 5mm × 3mm
DFN Packages
Applications
n RAID Systems
n ATCA, AMC, µTCA Systems
n Server I/O Cards
n 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 power good monitoring
are also provided.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
12V, 6A Card Resident Application
2mΩ
Si7108DN
VOUT
12V
*
12V
+ 6A
330µF
VIN
10V/DIV
10Ω
IIN
1A/DIV
AUTO
RETRY
SENSE– GATE SOURCE
SENSE+
VDD
OV
UV LTC4218DHC-12
FLT
PG
TIMER
ISET
1k
0.01µF
10k
VOUT
10V/DIV
PG
10V/DIV
0.1µF
1µF
INTVCC
GND
IMON
20k
2V = 7.5A
ADC
4218 TA01a
*TVS: DIODES INC SMAJ17A
Power-Up Waveform
CONTACT BOUNCE
25ms/DIV
4218 TA01b
For more information www.linear.com/LTC4218
4218fh
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