LTC4232
5A Integrated Hot Swap
Controller
Fea T Descrip T
n
Allows Safe Board Insertion into a Live Backplane The LTC 4232 is an integrated solution for Hot Swap
n
Small Footprint applications that allows a board to be safely inserted and
n
removed from a live backplane. The part integrates a Hot
33m MOSFET with R
SENSE
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Swap controller, power MOSFET and current sense resis-
Wide Operating Voltage Range: 2.9V to 15V
n tor in a single package for small form factor applications.
Adjustable, 10% Accurate Current Limit
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Current and Temperature Monitor Outputs
The LTC4232 provides separate inrush current control
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Overtemperature Protection
and a 10% accurate 5A current limit with foldback cur-
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Adjustable Current Limit Timer Before Fault
rent limiting. The current limit threshold can be adjusted
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Power Good and Fault Outputs
dynamically using an external pin. Additional features
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Adjustable Inrush Current Control
include a current monitor output that amplifies the sense
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2% Accurate Undervoltage and Overvoltage Protection
resistor voltage for ground referenced current sensing
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Pin Compatible with LTC4217 (DFN Package Only)
and a MOSFET temperature monitor output. Thermal limit,
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Available in 16-Lead 5mm 3mm DFN Package
overvoltage, undervoltage and power good monitoring
are also provided. For a 2A pin compatible version, see
LTC4217.
a T
The LTC4232-1 (separate data sheet) allows faster turn-on
n
RAID Systems, Solid State Drives
than the LTC4232 by providing 16ms debounce delay and
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Server I/O Cards
external control of the GATE ramp rate.
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Industrial
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Typical a T
12V, 5A Card Resident Application with Auto-Retry Power-Up Waveforms
V
OUT
V OUT 12V
12V
DD
* V
5A IN
+ CONTACT
150k
10V/DIV
330F
LTC4232DHC BOUNCE
107k
UV FB
I
IN
20k 10k
0.1A/DIV
FLT
5.23k
V
OUT
OV GATE
10V/DIV
10k PG
TIMER I
SET PG
10V/DIV
INTV I ADC
MON
CC
1F GND
4232 TA01b
20k 25ms/DIV
4232 TA01a
*TVS: DIODES INC. SMAJI7A
4232fc
1
For more information www.linear.com/LTC4232
ion pplica
ions pplica
ion uresLTC4232
a Te Maxi Mu M r a T p c F T
(Notes 1, 2)
TOP VIEW
Supply Voltage (V ) ................................. 0.3V to 28V
DD
Input Voltages
V 1 16 V
DD DD
FB, OV, UV ..............................................0.3V to 12V
UV 2 15 I
SET
TIMER ................................................... 0.3V to 3.5V
OV 3 14 I
MON
SENSE .............................V 10V or 0.3V to V TIMER 4 13 FB
17
DD DD
SENSE
INTV 5 12 FLT
Output Voltages CC
GND 6 11 PG
I , I ................................................. 0.3V to 3V
SET MON
OUT 7 10 GATE
PG, FLT .................................................. 0.3V to 35V
OUT 8 9 OUT
OUT ............................................ 0.3V to V + 0.3V
DD
INTV .................................................. 0.3V to 3.5V DHC PACKAGE
CC
16-LEAD (5mm 3mm) PLASTIC DFN
GATE (Note 3) ........................................ 0.3V to 33V
T = 125C, = 46C/W
JMAX JA
Operating Ambient Temperature Range EXPOSED PAD (PIN 17) IS SENSE,
= 46C/W SOLDERED, OTHERWISE = 140C/W
JA JA
LTC4232C ................................................ 0C to 70C
LTC4232I .............................................40C to 85C
Junction Temperature (Notes 4, 5) ........................ 125C
Storage Temperature Range .................. 65C to 150C
o r D i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4232CDHC#PBF LTC4232CDHC#TRPBF 4232 16-Lead (5mm 3mm) Plastic DFN 0C to 70C
LTC4232IDHC#PBF LTC4232IDHC#TRPBF 4232 16-Lead (5mm 3mm) Plastic DFN 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: