LTC4211 datasheet(8/22 Pages) LINER

8 / 22 page

LTC4235

4235f

For more information www.linear.com/LTC4235

pin FuncTions

PWRGD: Power Status Output. Output that pulls low when

the OUT pin rises above 10.5V and the MOSFET gate drive

between HGATE and OUT exceeds 4.2V. Otherwise it is

pulled high by a 10µA current source to a diode below

INTVCC. It may be pulled above INTVCC using an external

pull-up. Leave open if unused.

REG: Internal Regulated Supply for Current Sense Ampli-

fier. A 0.1µF or larger capacitor should be tied from REG to

SENSE+. This pin is not designed to drive external circuits.

SENSE+: Positive Current Sense Input. Connect this pin to

the diode-OR output of the external ideal diode MOSFETs

and input of the current sense resistor. The voltage sensed

at this pin is used for monitoring the current limit and

also to control DGATE for forward voltage regulation and

reverse turn-off. This pin has an undervoltage lockout

threshold of 1.9V that will turn off the Hot Swap MOSFET.

SENSE–: Negative Current Sense Input. Connect this pin

to the output of the current sense resistor. The current

limit circuit controls HGATE to limit the voltage between

SENSE+ and SENSE– to 25mV or less depending on the

voltage at the OUT pin.

LTC4211 Datasheet(PDF) 8 Page - Linear Technology