LTC4224IMS-2#TRPBF Linear Technology, LTC4224IMS-2#TRPBF Datasheet - Page 5

• Manufacturer Part Number: LTC4224IMS-2#TRPBF
• Description: IC CNTRLR HOT SWAP DUAL 10-MSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC4224IMS-2#TRPBF

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 1 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIN FUNCTIONS
SENSE1, SENSE2 (Pins 1,10): Current Sense Input. Con-
nect this pin to an external sense resistor. The current limit
circuit controls GATEn to limit the voltage between V
and SENSEn to 25mV. An Electronic Circuit Breaker (ECB)
is active during current limiting and trips after 5ms. To
disable current limit, connect this pin to V
V
Input. An undervoltage lockout circuit disables the part
until V
lower supply is disabled until it exceeds 0.8V.
GATE1, GATE2 (Pins 3, 8): Gate Drive for External N-channel
MOSFET. A charge pump sources 10μA from GATE to turn
on the external MOSFET. An internal clamp limits the gate
voltage to 5.5V above the higher of V
turn-off, a 1.5mA pulldown current discharges GATE to
FUNCTIONAL DIAGRAM
CC1
, V
CC
CC2
, the higher of V
(Pins 2, 9): Supply Voltage and Current Sense
V
V
CC1
CC2
CC1
V
and V
0.8V
CC
2.4V
0.8V
25mV
25mV
+
–
+
–
+
–
CC2
SENSE1
SENSE2
CC1
, exceeds 2.4V. The
–
+
+
–
and V
ACL1
ACL2
CCn
.
CC2
. During
CHARGE
PUMP
CCn
V
V
GND
CC1
CC2
ECB1
ECB2
UV
UV
CHARGE
PUMP
ground. During short-circuits, a 125mA pulldown current
is activated to discharge GATE to ground.
FAULT (Pin 4): Fault Status Output. Open-drain output
that is normally pulled high to V
nal resistor. It is pulled low when the ECB trips due to an
overcurrent condition at either supply. This pin may be
left open if unused.
ON1, ON2 (Pins 5, 6): On Control Input. A falling edge
turns on the external N-channel MOSFET and a rising edge
turns it off. A low to high transition on this pin resets an
ECB fault for the corresponding channel. Internally pulled
up to V
GND (Pin 7): Device Ground.
Exposed Pad (DFN Package Only): Exposed Pad may be
left open or connected to device ground.
10μA
CONTROL
LOGIC
V
CC
CC
10μA
by a 10μA current source.
5.5V
LTC4224-1/LTC4224-2
PULLDOWN
GATE
PULLDOWN
ON1
ON2
V
GATE
CC
5.5V
+
–
+
–
0.8V
0.8V
V
V
CC
CC
10μA
10μA
GATE1
GATE2
FAULT
ON1
ON2
422412 FD
CC1
or V
CC2
by an exter-
422412fa
5