LTC4217_15 Datasheet, PDF (1/18 Pages) Linear Technology – 2A Integrated Hot Swap Controller

Features
n _{Small Footprint}
n _{33mΩ MOSFET with RSENSE}
n _{Wide Operating Voltage Range: 2.9V to 26.5V}
n _{Adjustable, 5% 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 _{2% Accurate Undervoltage and Overvoltage}
Protection
n _{Available in 20-Lead TSSOP and 16-Lead}
5mm × 3mm DFN Packages
Applications
n _{RAID Systems}
n _{Server I/O Cards}
n _Industrial
LTC4217
2A Integrated Hot Swap
Controller
Description
The LTC^®4217 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 resistor
in a single package for small form factor applications. A
dedicated 12V version (LTC4217-12) contains preset 12V
specific thresholds, while the standard LTC4217 allows
adjustable thresholds.
The LTC4217 provides separate inrush current control
and a 5% accurate 2A 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,
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. Hot Swap is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Typical Application
12V, 1.5A Card Resident Application
12V
V_DD
OUT
+
V_OUT
12V
UV
12V
330µF ^1.5A
AUTO
RETRY
LTC4217DHC-12
10k
FLT
PG
0.1µF
TIMER
I_SET
INTV_CC
I_MON
GND
20k
ADC
4217 TA01a
V_IN
10V/DIV
I_IN
0.1A/DIV
V_OUT
10V/DIV
P_G
10V/DIV
Power-Up Waveforms
25ms/DIV
4217 TA01b
4217fe
1