LTC1647-3 Linear Technology, LTC1647-3 Datasheet - Page 3

• Manufacturer Part Number: LTC1647-3
• Description: Dual Hot Swap Controllers
• Manufacturer: Linear Technology

PI
temperature range, otherwise specifications are at T
SYMBOL PARAMETER
V
V
V
I
V
I
t
t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 3: An internal Zener on the GATE pins clamp the charge pump
voltage to a typical maximum operating voltage of 28V. External overdrive
of the GATE pin beyond the internal Zener voltage may damage the device.
LTC1647-1 Pinout
PIN
1
2
3
4
LTC1647-1 does not have the FAULT status feature.
LTC1647-2 Pinout
PIN
1
2
3
4
The ONX/FAULT X must be connected to a driver via a resistor if the
autoretry feature is being used..
ELECTRICAL CHARACTERISTICS
IN
LEAK
FAULT
RESET
ON
OFF
ONHI
ONLO
ONHYST
OL
V
GATE
U
DESCRIPTION
V
ON1
ON2
GND
DESCRIPTION
V
ON1 and FAULT 1
(Internally Tied Together)
ON2 and FAULT 2
(Internally Tied Together)
GND
CC
CC
TABLES
External MOSFET Gate Drive
ONX Threshold High
ONX Threshold Low
ONX Hysteresis
ONX Input Current
FAULT X Output Low Voltage
(LTC1647-2, LTC1647-3)
FAULT X Output Leakage Current
(LTC1647-3)
Circuit Breaker Delay Time
Circuit Breaker Reset Time
Turn-On Time
Turn-Off Time
PIN
5
6
7
8
PIN
5
6
7
8
DESCRIPTION
GATE 2
GATE 1
SENSE 2
SENSE 1
DESCRIPTION
GATE 2
GATE 1
SENSE 2
SENSE 1
CONDITIONS
(V
(V
ON = GND or V
I
I
No Fault, FAULT X = V
V
ONX High to Low, to FAULT X High
ONX Low to High, to GATE X On
ONX High to Low, to GATE X Off
O
O
CCX
GATE
GATE
A
= 1mA, V
= 5mA, V
= 25 C. V
– V
– V
– V
SENSEX
The
CC
CC
CC
CC
), V
), V
= 5V
= 5V
CC
CC
= 0 to 100mV
CC1
CC1
denotes the specifications which apply over the full operating
= 5V unless otherwise noted. (Note 2)
LTC1647-1/LTC1647-2/LTC1647-3
= V
= V
CC
The GATE capacitance must be < 0.15 F at maximum V
pin clamp voltage is desired, use an external Zener diode.
Note 4: The total supply current I
connected internally (LTC1647-1, LTC1647-2) or externally (LTC1647-3).
Note 5: The individual supply current I
The lower of the two supplies, V
current. The higher supply will carry the additional supply current of the
charge pump and the bias generator beside its channel’s current.
LTC1647-3 Pinout
PIN
1
2
3
4
5
6
7
8
CC2
CC2
= 5V
= 5V
= 12V
DESCRIPTION
V
ON1
FAULT 1
ON2
FAULT 2
NC
NC
GND
CC1
CC1
CC
is measured with V
and V
1.20
1.17
MIN
10
10
CCX
PIN
9
10
11
12
13
14
15
16
CC2
is measured on the LTC1647-3.
, will have its channel’s
DESCRIPTION
NC
NC
NC
GATE 2
GATE 1
SENSE 2
SENSE 1
V
1.29
1.21
TYP
CC2
0.8
0.3
13
15
70
50
2
1
1
1
CC
CC1
. If a lower GATE
MAX
1.38
1.25
100
0.4
and V
17
19
10
10
CC2
UNITS
3
mV
V
V
V
V
A
V
V
A
s
s
s
s