LTC4233
10A Guaranteed SOA
Hot Swap Controller
FEATURES DESCRIPTION
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Allows Safe Board Insertion into a Live Backplane The LTC 4233 is an integrated solution for Hot Swap
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Small Footprint applications that allows a board to be safely inserted and
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10m MOSFET Including R removed from a live backplane. The part integrates a Hot
SENSE
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Safe Operating Area Guaranteed at 41W, 30ms Swap controller, power MOSFET and current sense resis-
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Wide Operating Voltage Range: 2.9V to 15V tor in a single package for small form factor applications.
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Adjustable, 11% Accurate Current Limit The MOSFET Safe Operating Area is production tested
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Current and Temperature Monitor Outputs and guaranteed for the stresses in Hot Swap applications.
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Overtemperature Protection
The LTC4233 provides separate inrush current control
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Adjustable Current Limit Timer Before Fault
and an 11% accurate 11.2A current limit with output
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Power Good and Fault Outputs
dependent foldback. The current limit threshold can be
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Adjustable Inrush Current Control
adjusted dynamically using the I pin. Additional features
SET
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2.5% Accurate Undervoltage and Overvoltage
include a current monitor output that amplifies the sense
Protection
resistor voltage for ground referenced current sensing
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Available in 38-Lead (5mm 9mm) QFN Package
and a MOSFET temperature monitor output. Thermal limit,
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Pin Compatible with LTC4234
overvoltage, undervoltage and power good monitoring
are also provided. For a 20A pin compatible version see
LTC4234.
APPLICATIONS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
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Swap and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are
High Availability Servers
the property of their respective owners.
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Solid State Drives
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Industrial
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Network Routers and Switches
TYPICAL APPLICATION
12V, 10A Card Resident Application with Auto-Retry Power-Up Waveforms
V
OUT
12V 12V
V OUT
DD
CONTACT
V
IN
10A
* BOUNCE
LTC4233 150k 10V/DIV
107k
+
680F
UV FB
I
IN
0.2A/DIV
FLT
20k
5.23k
10k
V
OV
OUT
10V/DIV
10k SENSE PG
GATE
SENSE
PG
I
TIMER SET
10V/DIV
ADC
I
MON
INTV
CC
4233 TA01b
1F GND 20k
20ms/DIV
4233 TA01a
*TVS: DIODES INC. SMAJ17A
4233f
1
For more information www.linear.com/LTC4233LTC4233
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Notes 1, 2)
TOP VIEW
Supply Voltage (V ) ................................. 0.3V to 28V
DD
Input Voltages
UV I
1 38
SET
FB, OV, UV ..............................................0.3V to 12V
OV FB
2 37
TIMER ................................................... 0.3V to 3.5V
39
I 3 36 FLT
MON
V
SENSE , SENSE .....V 10V or 0.3V to V + 0.3V DD
DD DD
TIMER PG
4 35
Output Voltages
INTV SENSE
CC 5 34
I , I ................................................. 0.3V to 3V V (DNC) 6 33 V (DNC)
DD DD
SET MON
GND GATE
7 32
PG, FLT ................................................. 0.3V to 35V
SENSE (DNC) SENSE
8 31
OUT ............................................ 0.3V to V + 0.3V
DD
OUT 9 30 OUT
INTV .................................................. 0.3V to 3.5V
CC
OUT OUT
10 29
GATE (Note 3) ........................................ 0.3V to 33V
OUT 40 OUT
11 28
SENSE
Operating Ambient Temperature Range OUT 12 27 OUT
OUT 13 26 OUT
LTC4234C ................................................ 0C to 70C
OUT OUT
14 25
LTC4234I .............................................40C to 85C
OUT 15 24 OUT
LTC4234H .......................................... 40C to 125C
OUT 16 23 OUT
Junction Temperature (Note 4, 5) ......................... 150C
Storage Temperature Range .................. 65C to 150C
WHH PACKAGE
38-LEAD PLASTIC QFN (5mm 9mm)
T = 150C, = 15C/W
JMAX JA
EXPOSED PAD (PINS 39 AND 40) ARE VDD AND SENSE,
= 15C/W SOLDERED, OTHERWISE = 50C/W
JA JA
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4233CWHH#PBF LTC4233CWHH#TRPBF 4233 38-Lead (5mm 9mm) Plastic QFN 0C to 70C
LTC4233IWHH#PBF LTC4233IWHH#TRPBF 4233 38-Lead (5mm 9mm) Plastic QFN 40C to 85C
LTC4233HWHH#PBF LTC4233HWHH#TRPBF 4233 38-Lead (5mm 9mm) Plastic QFN 40C to 125C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: