LTC4219_15 Datasheet, PDF (1/18 Pages) Linear Technology – 5A Integrated Hot Swap Controller

Features
n _{Small Footprint}
n _{33mW MOSFET with RSENSE}
n _{Available in Preset 12V and 5V Versions}
n _{Adjustable, 10% Accurate Current Limit}
n _{Current and Temperature Monitor Outputs}
n _{Overtemperature Protection}
n _{Adjustable Current Limit Timer Before Fault}
n _{Power Good and Fault Outputs}
n _{Adjustable Inrush Current Control}
n _{Available in 16-Lead 5mm × 3mm DFN Packages}
Applications
n _{RAID Systems}
n _{Server I/O Cards}
n _Industrial
LTC4219
5A Integrated
Hot Swap Controller
Description
The LTC^®4219 is an integrated solution for Hot Swap™
applications that allows a board to be safely inserted and
removed from a live backplane. The part integrates a Hot
Swap controller, power MOSFET and current sense resis-
tor in a single package for small form factor applications.
The LTC4219 provides separate inrush current control
and a 10% accurate 5.6A current limit with foldback cur-
rent limiting. The current limit threshold can be adjusted
dynamically using an external pin. Additional features
include a current monitor output that amplifies the sense
resistor voltage for ground referenced current sensing
and a MOSFET temperature monitor output. Thermal limit
and power good monitoring are also provided. The power
good detection level and foldback current limit profile are
internally preset for 5V (LTC4219-5) and 12V (LTC4219-12)
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.
Typical Application
12V, 5A Card Resident Application
V_OUT
12V
V_DD
OUT
12V
*
12V
+
5A
200k 200k LTC4219DHC-12
330µF
10k _12V
EN1
PG
10k
EN2
FLT
TIMER
I_SET
*DIODES INC. SMAJ22A
INTV_CC
I_MON
1µF
GND
ADC
20k
4219 TA01a
V_IN
10V/DIV
I_IN
0.1A/DIV
V_OUT
10V/DIV
PG
10V/DIV
Power-Up Waveforms
CONTACT
BOUNCE
20ms/DIV
4219 TA01b
For more information www.linear.com/LTC4219
4219fc
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