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LTC4211CMS#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P40
LTC4211
1
4211fc
For more information www.linear.com/LTC4211
TYPICAL APPLICATION
FEATURES DESCRIPTION
Hot Swap Controller with
Multifunction Current Control
APPLICATIONS
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.
n
Allows Safe Board Insertion and Removal
from a Live Backplane
n
Controls Supply Voltages from 2.5V to 16.5V
n
Programmable Soft-Start with Inrush Current
Limiting, No External Gate Capacitor Required
n
Faster Turn-Off Time Because No External Gate
Capacitor is Required
n
Dual Level Overcurrent Fault Protection
n
Programmable Response Time for Overcurrent
Protection (MS)
n
Programmable Overvoltage Protection (MS)
n
Automatic Retry or Latched Mode Operation (MS)
n
High Side Drive for an External N-Channel FET
n
User-Programmable Supply Voltage Power-Up Rate
n
FB Pin Monitors V
OUT
and Signals RESET
n
Glitch Filter Protects Against Spurious RESET Signal
n
Electronic Circuit Breaker
n
Hot Board Insertion and Removal (Either On
Backplane or On Removable Card)
n
Industrial High Side Switch/Circuit Breaker
The LT C
®
4211 is a hot swap controller that allows a board
to be safely inserted and removed from a live backplane.
An internal high side switch driver controls the gate of an
external N-channel MOSFET for supply voltages ranging
from 2.5V to 16.5V. The LTC4211 provides soft-start and
inrush current limiting during the start-up period which
has a programmable duration.
Two on-chip current limit comparators provide dual level
overcurrent circuit breaker protection. The slow com
-
parator trips at V
CC
– 50mV and activates in 20µs (or is
programmed by an external filter capacitor, MS only).
The fast comparator trips at V
CC
– 150mV and typically
responds in 300ns.
The FB pin monitors the output supply voltage and signals
the RESET output pin. The ON pin signal turns the chip on
and off and can also be used for the reset function. The
MS package has FAULT and FILTER pins to provide addi-
tional functions like fault indication, autoretry or latch-off
modes, programmable current limit response time and
programmable
overvoltage protection using an external
Zener diode clamp.
Single Channel 5V Hot Swap Controller Power-Up Sequence
+
V
CC
SENSE
LTC4211
8
2
3 4
7 6
C
LOAD
V
OUT
5V
5A
GND
4211 TA01A
5
1
R4
15k
GATE
GNDTIMER
PCB CONNECTION SENSE
C
TIMER
10nF
FB
ON
SHORT
LONG
V
CC
5V
GND
LONG
Z1 = 1SMA10A OR SMAJ10A
* OPTIONAL
RESET
R2
10k
R1
20k
R
X
10Ω
R
SENSE
0.007Ω
PCB EDGE
CONNECTOR
(MALE)
M1
Si4410DY
Z1*
R3
36k
R5
10k
µP
LOGIC
RESET
C
X
100nF
BACKPLANE
CONNECTOR
(FEMALE)
4211 TA01b
2.5ms/DIV
NO C
LOAD
V
GATE
5V/DIV
V
RESET
5V/DIV
V
ON
1V/DIV
V
TIMER
1V/DIV
LTC4211
2
4211fc
For more information www.linear.com/LTC4211
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
V
CC
SENSE
GATE
FB
RESET
ON
TIMER
GND
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C, θ
JA
= 150°C/W
1
2
3
4
RESET
ON
TIMER
GND
8
7
6
5
V
CC
SENSE
GATE
FB
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 200°C/W
1
2
3
4
5
RESET
ON
FILTER
TIMER
GND
10
9
8
7
6
FAULT
V
CC
SENSE
GATE
FB
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 200°C/W
Supply Voltage (V
CC
) ................................................17V
Input Voltage
FB, ON .................................................. –0.3V to 17V
SENSE, FILTER ........................... –0.3V to V
CC
+ 0.3V
TIMER ...................................................... –0.3V to 2V
Output Voltage
GATE ................................. Internally Limited (Note 3)
RESET, FAU LT ....................................... –0.3V to 17V
Operating Temperature Range
LTC4211C ................................................ 0°C to 70°C
LTC4211I ............................................. –40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) ................... 300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4211CS8#PBF LTC4211CS8#TRPBF 4211 8-Lead Plastic SO 0°C to 70°C
LTC4211IS8#PBF LTC4211IS8#TRPBF 4211I 8-Lead Plastic SO –40°C to 85°C
LTC4211CMS8#PBF LTC4211CMS8#TRPBF LTSC 8-Lead Plastic MSOP 0°C to 70°C
LTC4211IMS8#PBF LTC4211IMS8#TRPBF LTSD 8-Lead Plastic MSOP –40°C to 85°C
LTC4211CMS#PBF LTC4211CMS#TRPBF LTSU 10-Lead Plastic MSOP 0°C to 70°C
LTC4211IMS#PBF LTC4211IMS#TRPBF LTSV 10-Lead Plastic MSOP –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
V
CC
Supply Voltage Range
l
2.5 16.5 V
I
CC
V
CC
Supply Current FB = High, ON = High, TIMER = Low
l
1 1.5 mA
V
LKO
Internal V
CC
Undervoltage Lockout V
CC
Low-to-High Transition
l
2.13 2.3 2.47 V
V
LKOHST
V
CC
Undervoltage Lockout Hysteresis 120 mV
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted. (Note 2)
ORDER INFORMATION
http://www.linear.com/product/LTC4211#orderinfo
LTC4211
3
4211fc
For more information www.linear.com/LTC4211
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
INFB
FB Input Current V
FB
= V
CC
or GND ±1 ±10 µA
I
INON
ON Input Current V
ON
= V
CC
or GND ±1 ±10 µA
I
LEAK
RESET, FAULT Leakage Current V
RESET
= V
FAULT
= 15V, Pull-Down Device Off
l
±0.1 ±2.5 µA
I
INSENSE
SENSE Input Current V
SENSE
= V
CC
or GND ±1 ±10 µA
V
CB(FAST)
SENSE Trip Voltage (V
CC
– V
SENSE
) Fast Comparator Trips
l
130 150 170 mV
V
CB(SLOW)
SENSE Trip Voltage (V
CC
– V
SENSE
) Slow Comparator Trips
l
40 50 60 mV
I
GATEUP
GATE Pull-Up Current Charge Pump On, V
GATE
≤ 0.2V
l
–12.5 –10 –7.5 µA
I
GATEDOWN
Normal GATE Pull-Down Current ON Low
l
130 200 270 µA
Fast GATE Pull-Down Current FAULT Latched and Circuit Breaker Tripped or in
UVLO
50 mA
∆V
GATE
External N-Channel Gate Drive V
GATE
– V
CC
(For V
CC
= 2.5V)
V
GATE
– V
CC
(For V
CC
= 2.7V)
V
GATE
– V
CC
(For V
CC
= 3.3V)
V
GATE
– V
CC
(For V
CC
= 5V)
V
GATE
– V
CC
(For V
CC
= 12V)
V
GATE
– V
CC
(For V
CC
= 15V)
l
l
l
l
l
l
2.5
4.5
5.0
10
10
8
8
8
10
16
18
18
V
V
V
V
V
V
V
GATEOV
GATE Overvoltage Lockout Threshold
l
0.08 0.2 0.3 V
V
FB
FB Voltage Threshold FB High to Low
l
1.223 1.236 1.248 V
∆V
FB
FB Threshold Line Regulation 2.5V ≤ V
CC
≤ 16.5V
l
0.5 5 mV
V
FBHST
FB Voltage Threshold Hysteresis 3 mV
V
ONHI
ON Threshold High
l
1.23 1.316 1.39 V
V
ONLO
ON Threshold Low
l
1.20 1.236 1.26 V
V
ONHST
ON Hysteresis 80 mV
I
FILTER
FILTER Current During Slow Fault Condition
l
–2.5 –2 –1.5 µA
During Normal and Reset Conditions
l
7 10 13 µA
V
FILTER
FILTER Threshold Latched Off Threshold, FILTER Low to High
l
1.20 1.236 1.26 V
V
FILTERHST
FILTER Threshold Hysteresis 80 mV
I
TMR
TIMER Current Timer On, V
TIMER
= 1V
l
–2.5 –2 –1.5 µA
Timer Off, TIMER = 1.5V 3 mA
V
TMR
TIMER Threshold TIMER Low to High
l
1.20 1.236 1.26 V
TIMER High to Low
l
0.15 0.200 0.40 V
V
FAULT
FAULT Threshold Latched Off Threshold, FAULT High to Low
l
1.20 1.236 1.26 V
V
FAULTHST
FAULT Threshold Hysteresis 50 mV
V
OLFAULT
Output Low Voltage I
FAULT
= 1.6mA
l
0.14 0.4 V
V
OLRESET
Output Low Voltage I
RESET
= 1.6mA
l
0.14 0.4 V
t
FAULTFC
FAST COMP Trip to GATE Discharging V
CB
= 0mV to 200mV Step
l
300 700 ns
t
FAULTSC
SLOW COMP Trip to GATE Discharging V
CB
= 0mV to 100mV Step,
8-Pin Version or FILTER Floating
l
10 20 30 µs
V
CB
= 0mV to 100mV Step,
10nF at FILTER Pin to GND
l
4 6 8 ms
t
EXTFAULT
FAULT Low to GATE Discharging V
FAULT
= 5V to 0V
l
1 3 5 µs
t
FILTER
FILTER High to FAULT Latched V
FILTER
= 0V to 5V
l
2 4.5 7 µs
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LTC4211CMS#PBF

Mfr. #:
Buy LTC4211CMS#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Hot Swap Controller w/Active Limit
Lifecycle:
New from this manufacturer.
Delivery:
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