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LTC4224IMS-1#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4224-1/LTC4224-2
1
422412fa
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Compact Dual Low
Voltage Hot Swap Controller
The LTC
®
4224 Dual Low Voltage Hot Swap™ controller
allows a board to be safely inserted and removed from a
live backplane. It controls two supplies with external N-
channel MOSFETs and operates with one supply as low
as 1V provided the other supply is 2.7V or greater. The
LTC4224 can ramp up the supplies in any order and at
adjustable ramp rates. To minimize the number of external
components and PCB area, the gate capacitor is optional,
all timing delays are generated internally, and the ON pins
have integrated pull-up currents.
Protection against overcurrent faults is provided by a fast-
acting current limit and timed circuit breakers. A FAULT pin
signals overcurrent faults. The LTC4224-1 remains off after
a fault, while the LTC4224-2 automatically tries to apply
power again after a four second cool-down period.
Normal Power-Up Waveform
n
Allows Safe Board Insertion and Removal from a
Live Backplane
n
Controls Load Voltages from 1V to 6V
n
No Gate Components Required
n
Adjustable Current Limit with Circuit Breaker
n
Limits Peak Fault Current in ≤1μs
n
No External Timing Capacitor Required
n
Adjustable Supply Voltage Power-Up Rate
n
Gate Drive for External N-channel MOSFET
n
LTC4224-1: Latchoff After Fault
n
LTC4224-2: Automatic Retry After Fault
n
10-Lead MSOP and 3mm × 2mm DFN Packages
n
Optical Networking
n
Low Voltage Hot Swap
n
Electronic Circuit Breakers
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Hot Swap
is a trademark of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
422412 TA01a
LTC4224
V
CC1
FAULT
SENSE1 SENSE2 GATE1
GATE2
ON1
ON2
GND GND
V
CC2
5V
3.3V
0.015Ω
0.010Ω
FDS6911
5V
1A
3.3V
2A
LTC4224
CONNECTOR PLUG-IN
CARD
V
OUT1
5V/DIV
V
OUT2
5V/DIV
0.5ms/DIV
422412 TA01b
I
IN1
2A/DIV
I
IN2
2A/DIV
C
LOAD
= 150µF
LTC4224-1/LTC4224-2
2
422412fa
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CCn
) .................................. –0.3V to 9V
Input Voltages
SENSEn, ONn ........................................... –0.3V to 9V
Output Voltages
GATEn – V
CC
(Note 4) .............................. –0.3V to 5V
FAULT ....................................................... –0.3V to 9V
(Notes 1, 2)
TOP VIEW
11
DDB PACKAGE
10-LEAD
(
3mm × 2mm
)
PLASTIC DFN
SENSE1
V
CC1
GATE1
FAULT
ON1
SENSE2
V
CC2
GATE2
GND
ON2
6
8
7
9
10
5
4
2
3
1
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
1
2
3
4
5
SENSE1
V
CC1
GATE1
FAULT
ON1
10
9
8
7
6
SENSE2
V
CC2
GATE2
GND
ON2
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 160°C/W
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC4224CDDB-1#PBF LTC4224CDDB-1#TRPBF LDTT
10-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC4224CDDB-2#PBF LTC4224CDDB-2#TRPBF LDNV
10-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC4224IDDB-1#PBF LTC4224IDDB-1#TRPBF LDTT
10-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC4224IDDB-2#PBF LTC4224IDDB-2#TRPBF LDNV
10-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC4224CMS-1#PBF LTC4224CMS-1#TRPBF LTDTV 10-Lead Plastic MSOP 0°C to 70°C
LTC4224CMS-2#PBF LTC4224CMS-2#TRPBF LTDNW 10-Lead Plastic MSOP 0°C to 70°C
LTC4224IMS-1#PBF LTC4224IMS-1#TRPBF LTDTV 10-Lead Plastic MSOP –40°C to 85°C
LTC4224IMS-2#PBF LTC4224IMS-2#TRPBF LTDNW 10-Lead Plastic MSOP –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
Operating Temperature Range
LTC4224C ................................................ 0°C to 70°C
LTC4224I.............................................. –40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature Range (Soldering, 10 sec)
MSOP Package ................................................. 300°C
LTC4224-1/LTC4224-2
3
422412fa
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specifi ed.
The l denotes the specifi cations which apply over the full operating
temperature range. T
A
= 25°C, V
CC1
= 5V, V
CC2
= 3.3V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
CC
V
CC
Supply Range V
CC
= Max (V
CC1
, V
CC2
)
l
2.7 6 V
I
CC
V
CC
Supply Current
l
1.4 3 mA
V
CC(UVL)
V
CC
Undervoltage Lockout V
CC
Rising
l
2.2 2.4 2.65 V
V
CCLO
V
CCLO
Supply Range V
CCLO
= Min (V
CC1
, V
CC2
),
V
CC
≥ 2.7V
l
16V
I
CCLO
V
CCLO
Supply Current
l
40 100 A
V
CCLO(UVL)
V
CCLO
Undervoltage Lockout V
CCLO
Falling
l
0.76 0.8 0.84 V
External Gate Drive
ΔV
GATE
Gate Drive
(V
GATEn
– V
CC
)
I
GATEn
= 0µA, –1µA
l
4.5 5.5 7 V
I
GATE(UP)
Gate Pull-Up Current Gate Drive On, V
GATEn
= 1V
l
–7 –10 –13 A
I
GATE(DN)
Gate Pull-Down Current V
ONn
= 1V, V
GATEn
= 10V
l
0.5 1.5 3 mA
I
GATE(FPD)
Gate Fast Pull-Down Current Fast Turn-Off, V
GATEn
= 10V
l
50 125 200 mA
Current Limit
ΔV
SENSE(CB)
Circuit Breaker Trip Sense Voltage
(V
CCn
– SENSEn)
l
22.5 25 27.5 mV
I
SENSE
SENSE Input Current V
SENSE1
= 5V, V
SENSE2
= 3.3V
l
40 100 A
Inputs and Outputs
V
ON(TH)
ONn Threshold Voltage V
ONn
Rising
l
0.76 0.8 0.84 V
ΔV
ON(HYST)
ONn Hysteresis
l
15 30 50 mV
I
ON(IN)
ONn Pull-Up Current V
ONn
= 1V
l
–5 –10 –15 A
V
OL
Output Low Voltage (FAULT)I
FAUL T
= 3mA
l
0.2 0.4 V
Delay
t
CB
Circuit Breaker Delay
l
2.5 5 7.5 ms
t
PHL(SENSE)
Sense Voltage, (V
CCn
– SENSEn) High to
GATE Low
ΔV
SENSE
= 200mV, C
GATE
= 10nF
l
0.4 1 s
t
PLH(GATE)
ONn Low or Input Supply High to GATEn
High Prop Delay
l
51015 ms
t
PLH(UVL)
V
CCn
Low to GATEn Low Prop Delay
l
816 s
t
D(UV)
UV Turn-On Delay V
CC
Out of UV
l
80 160 240 ms
t
D(COOL)
Auto-Retry Cooling Delay Note 3
l
246 s
t
BLANK
Start-Up Circuit Breaker Blanking Delay
l
2.5 5 7.5 ms
Note 3: LTC4224-2 only.
Note 4: The greater of V
CC1
and V
CC2
is the internal supply voltage (V
CC
).
An internal clamp limits the GATE pin to a minimum 5V above V
CC
. Driving
this pin beyond the clamp may damage the device.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC4224IMS-1#PBF

Mfr. #:
Buy LTC4224IMS-1#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Compact 2x L V Hot Swap Cntr
Lifecycle:
New from this manufacturer.
Delivery:
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