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LTC4218IGN#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
LTC4218
1
4218fh
For more information www.linear.com/LTC4218
Features
applications
Description
Hot Swap Controller
The LT C
®
4218 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 from 2.9V
to 26.5V. A dedicated 12V version (LTC4218-12) contains
preset 12V specific thresholds, while the standard LTC4218
allows adjustable thresholds.
The LTC4218 provides an accurate (5%) current limit with
current foldback limiting. The current limit threshold can
be adjusted dynamically using an external pin. Additional
features include a current monitor output that amplifies
the sense voltage for ground referenced current sensing.
Overvoltage, undervoltage and power good monitoring
are also provided.
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, 6A Card Resident Application
n
Wide Operating Voltage Range: 2.9V to 26.5V
n
Adjustable, 5% Accurate 15mV Current Limit
n
Current Monitor Output
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 SSOP and 16-Pin 5mm × 3mm
DFN Packages
n
RAID Systems
n
ATCA, AMC, µTCA Systems
n
Server I/O Cards
n
Industrial
Power-Up Waveform
typical application
25ms/DIV
4218 TA01b
V
IN
10V/DIV
I
IN
1A/DIV
V
OUT
10V/DIV
PG
10V/DIV
CONTACT BOUNCE
ADC
1µF
12V
20k
2V = 7.5A
4218 TA01a
1k
10k
AUTO
RETRY
0.1µF
0.01µF
330µF
SENSE
–
GATE
SENSE
+
V
DD
UV
OV
SOURCE
PG
GND
I
MON
I
SET
LTC4218DHC-12
INTV
CC
TIMER
F LT
10Ω
2mΩ
Si7108DN
*TVS: DIODES INC SMAJ17A
*
V
OUT
12V
6A
+
LTC4218
2
4218fh
For more information www.linear.com/LTC4218
16
15
14
13
12
11
10
9
17
1
2
3
4
5
6
7
8
SENSE
+
SENSE
–
I
SET
I
MON
FB
FLT
PG
GATE
NC
V
DD
UV
OV
TIMER
INTV
CC
GND
SOURCE
TOP VIEW
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 17) IS SUBSTRATE GND
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
V
DD
UV
OV
TIMER
INTV
CC
GND
SOURCE
SENSE
+
SENSE
–
I
SET
I
MON
FB
FLT
PG
GATE
T
JMAX
= 150°C, θ
JA
= 135°C/W
pin conFiguration
absolute MaxiMuM ratings
Supply Voltage (V
DD
) ................................. –0.3V to 35V
Input Voltages
FB, OV, UV
............................................. –0.3V to 12V
TIMER
................................................... –0.3V to 3.5V
SENSE
–
.............................V
DD
– 10V or –0.3V to V
DD
SENSE
+
.............................V
DD
– 10V or –0.3V to V
DD
SOURCE ........................................ – 5V to V
DD
+ 0.3V
Output Voltages
I
SET
, I
MON
................................................. –0.3V to 3V
PG, FLT
.................................................. –0.3V to 35V
INTV
CC
.................................................. –0.3V to 3.5V
GATE (Note 3)
........................................ –0.3V to 35V
(Notes 1, 2)
Operating Ambient Temperature Range
LTC4218C
................................................ 0°C to 70°C
LTC4218I
.............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
GN Package Only ..............................................300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4218CDHC-12#PBF LTC4218CDHC-12#TRPBF 421812 16-Lead (5mm × 3mm) Plastic DFN 0°C to 70°C
LTC4218IDHC-12#PBF LTC4218IDHC-12#TRPBF 421812 16-Lead (5mm × 3mm) Plastic DFN –40°C to 85°C
LTC4218CGN#PBF LTC4218CGN#TRPBF 4218 16-Lead Plastic SSOP 0°C to 70°C
LTC4218IGN#PBF LTC4218IGN#TRPBF 4218I 16-Lead Plastic SSOP –40°C to 85°C
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: 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.
orDer inForMation
(http://www.linear.com/product/LTC4218#orderinfo)
LTC4218
3
4218fh
For more information www.linear.com/LTC4218
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 12V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Characteristics
V
DD
Input Supply Range
l
2.9 26.5 V
I
DD
Input Supply Current FET On
l
1.6 5 mA
V
DD(UVL)
Input Supply Undervoltage Lockout V
DD
Rising
l
2.65 2.73 2.85 V
V
DD(UVTH)
Input Supply Undervoltage Threshold LTC4218-12 Only V
DD
Rising
l
9.6 9.88 10.2 V
ΔV
DD(UVHYST)
Input Supply Undervoltage Hysteresis LTC4218-12 Only
l
520 640 760 mV
V
DD(OVTH)
Input Supply Overvoltage Threshold LTC4218-12 Only V
DD
Rising
l
14.7 15.05 15.4 V
ΔV
DD(OVHYST)
Input Supply Overvoltage Hysteresis LTC4218-12 Only
l
183 244 305 mV
V
SOURCE(PGTH)
SOURCE Power Good Threshold LTC4218-12 Only V
SOURCE
Rising
l
10.2 10.5 10.8 V
ΔV
SOURCE(PGHYST)
SOURCE Power Good Hysteresis LTC4218-12 Only
l
127 170 213 mV
ΔV
SNS(TH)
Current Limit Sense Voltage Threshold
(V
SENSE
+
– V
SENSE
–
)
V
FB
= 1.23V
V
FB
= 0V
V
FB
= 1.23V, R
SET
= 20kΩ
l
l
l
14.25
2.8
6.7
15
3.75
7.5
15.75
4.7
8.325
mV
mV
mV
I
SENSE
–
(IN)
SENSE
–
Input Current V
SENSE
–
= 12V
l
4 ±10 µA
I
SENSE
+
(IN)
SENSE
+
Input Current V
SENSE
+
= 12V
l
5.5 ±20 µA
ΔV
GATE
External N-Channel Gate Drive
(V
GATE
– V
SOURCE
)
V
DD
= 2.9V to 26.5V (Note 3)
I
GATE
= 0, –1µA
l
5 6.15 6.5 V
ΔV
GATE-HIGH(TH)
Gate High Threshold (V
GATE
– V
SOURCE
)
l
3.5 4.2 4.8 V
I
GATE(UP)
External N-Channel Gate Pull-Up Current Gate Drive On, V
GATE
= V
SOURCE
= 12V
l
–19 –24 –29 µA
I
GATE(FST)
External N-Channel Gate Fast Pull-Down
Current
Fast Turn Off, V
GATE
= 18V,
V
SOURCE
=12V
l
100 170 220 mA
I
GATE(DN)
External N-Channel Gate Pull-Down Current Gate Drive Off, V
GATE
= 18V,
V
SOURCE
=12V
l
200 250 400 µA
Inputs
I
IN
OV, UV, FB Input Current V
PIN
= 1.2V, LTC4218 Only
l
0 ±1 µA
R
IN
OV, UV, FB Input Resistance LTC4218-12 Only
l
13 18 23 kΩ
V
(TH)
OV, UV, FB Threshold Voltage V
PIN
Rising
l
1.21 1.235 1.26 V
ΔV
OV(HYST)
OV Hysteresis
l
10 20 30 mV
ΔV
UV(HYST)
UV Hysteresis
l
50 80 110 mV
V
UV(RTH)
UV Reset Threshold Voltage V
UV
Falling
l
0.55 0.62 0.7 V
ΔV
FB(HYST)
FB Power Good Hysteresis
l
10 20 30 mV
R
ISET
I
SET
Internal Resistor
l
19.5 20 20.5 kΩ
I
SOURCE
SOURCE Input Current V
SOURCE
= V
GATE
= 12V, LTC4218-12 Only
V
SOURCE
= V
GATE
= 12V, LTC4218 Only
V
SOURCE
= V
GATE
= 0V
l
l
l
50
1
70
2
0
90
4
±1
µA
µA
µA
Outputs
V
INTVCC
INTV
CC
Output Voltage I
SINK
= 0mA, –10mA 3.1 V
V
OL
PG, F LT Output Low Voltage I
SINK
= 2mA
l
0.4 0.8 V
I
OH
PG, F LT Input Leakage Current V = 30V
l
0 ±10 µA
V
TIMER(H)
TIMER High Threshold V
TIMER
Rising
l
1.2 1.235 1.28 V
V
TIMER(L)
TIMER Low Threshold V
TIMER
Falling
l
0.1 0.21 0.3 V
I
TIMER(UP)
TIMER Pull Up Current V
TIMER
= 0V
l
–80 –100 –120 µA
I
TIMER(DN)
TIMER Pull-Down Current V
TIMER
= 1.2V
l
1.4 2 2.6 µA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

LTC4218IGN#PBF

Mfr. #:
Buy LTC4218IGN#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Low Voltage Hot Swap Controller with Adjustable Current Limit
Lifecycle:
New from this manufacturer.
Delivery:
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