LTC4232
1
4232fa
Typical applicaTion
FeaTures
applicaTions
DescripTion
5A Integrated Hot Swap
Controller
The LTC
?/DIV>
4232 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 LTC4232 provides separate inrush current control
and a 10% accurate 5A 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.
12V, 5A Card Resident Application with Auto-Retry
n
Small Footprint
n
33m?SPAN class="pst LTC4232CDHC-TRPBF_2346323_8"> MOSFET with R
SENSE
n
Wide Operating Voltage Range: 2.9V to 15V
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
2% Accurate Undervoltage and Overvoltage
Protection
n
Available in 16-Lead 5mm ?3mm DFN Package
n
RAID Systems
n
Server I/O Cards
n
Industrial
Power-Up Waveforms
V
IN
10V/DIV
I
IN
0.1A/DIV
V
OUT
10V/DIV
PG
10V/DIV
25ms/DIV
4232 TA01b
CONTACT
BOUNCE
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. Hot Swap and PowerPath are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
12V
V
OUT
12V
5A
4232 TA01a
330礔
10k
V
DD
I
SET
TIMER
UV
INTV
CC
OUT
FB
GATE
GND
PG
I
MON
LTC4232DHC
OV
FLT
+
20k
0.1礔
ADC
107k
10k
5.23k
150k
20k