LTC4217
1
4217fg
For more information www.linear.com/LTC4217
Typical applicaTion
FeaTures
applicaTions
DescripTion
2A Integrated Hot
Swap Controller
The LT C
®
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 current 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.
For a 5A pin compatible version, see LTC4232.
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.
12V, 1.5A Card Resident Application with Auto-Retry
n
Small Footprint
n
33mΩ MOSFET with R
SENSE
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
Pin Compatible with LTC4232 (DFN Package Only)
n
Available in 20-Lead TSSOP and 16-Lead
5mm × 3mm DFN Packages
n
RAID Systems, Solid State Drives
n
Server I/O Cards
n
Industrial
Power-Up Waveforms
ADC
1µF
12V
V
OUT
12V
1.5A
20k
4217 TA01a
10k
330µF
V
DD
UV
OUT
PG
I
SET
GATE
GND
I
MON
LTC4217DHC-12
INTV
CC
TIMER
F LT
AUTO
RETRY
+
* TVS: DIODES INC. SMAJ17A
*
V
IN
10V/DIV
CONTACT
BOUNCE
I
IN
0.1A/DIV
V
OUT
10V/DIV
P
G
10V/DIV
25ms/DIV
4217 TA01b