LTC4241IGN#TR Linear Technology, LTC4241IGN#TR Datasheet - Page 8

• Manufacturer Part Number: LTC4241IGN#TR
• Description: IC CTRLR HOTSWAP 3.3V AUX 20SSOP
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC4241IGN#TR

• Applications: PCI, PCI-X
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 5V, ±12V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.154", 3.91mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PI FU CTIO S
LTC4241
a constant voltage across the sense resistor and a
constant current through the switch. A foldback feature
makes the current limit decrease as the voltage at the
3V
3V
GATE (Pin 15): High Side Gate Drive for the 3.3V and 5V
PCI Supplies External N-channel MOSFETs. Requires an
external series RC network for the current limit loop
compensation and setting the minimum ramp-up rate.
During power-up, the slope of the voltage rise at the GATE
is set by the internal 60 A pull up current source and the
external GATE capacitor connected to ground. During
power-down, the slope of the falling voltage is set by the
200 A current source connected to ground and the exter-
nal GATE capacitor.
5V
resistor placed in the supply path between 5V
5V
a constant voltage across the sense resistor and a con-
stant current through the switch. A foldback feature makes
8
OUT
SENSE
SENSE
SENSE
U
pin approaches ground. To disable the current limit,
, the GATE pin voltage will be adjusted to maintain
and 3V
(Pin 16): 5V Current Limit Set Pin. With a sense
U
IN
can be shorted together.
U
IN
and
the current limit decrease as the voltage at the 5V
approaches ground. To disable the current limit, 5V
and 5V
5V
5V input supply voltage. An undervoltage lockout circuit
prevents the switches from turning on when the voltage at
the 5V
5V
5V output supply voltage. The PWRGD signal cannot go
low until the 5V
V
connected between V
fall below –10.5V before the PWRGD signal can go low on
the LTC4241.
12V
connected between 12V
exceed 11.1V before the PWRGD signal can go low on the
LTC4241
EEOUT
IN
OUT
OUT
(Pin 17): 5V Supply Sense Input. Used to monitor the
IN
(Pin 18): 5V Output Monitor. Used to monitor the
IN
(Pin 19): –12V Supply Output. A 1.2 switch is
(Pin 20): 12V Supply Output. A 0.5 switch is
pin is less than 3.9V.
can be shorted together.
OUT
pin exceeds 4.65V.
EEIN
IN
and 12V
and V
EEOUT
OUT
. V
. 12V
EEOUT
OUT
sn4241 4241f
OUT
SENSE
must
must
pin