LTC4241

8

sn4241 4241f

PI FU CTIO S

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

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

µA 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

µA current source connected to ground and the exter-

nal GATE capacitor.

a constant voltage across the sense resistor and a con-

stant current through the switch. A foldback feature makes

5V input supply voltage. An undervoltage lockout circuit

prevents the switches from turning on when the voltage at

5V output supply voltage. The PWRGD signal cannot go

fall below –10.5V before the PWRGD signal can go low on

the LTC4241.

exceed 11.1V before the PWRGD signal can go low on the

LTC4241