LTC4367 datasheet(10/30 Pages) AD

10 / 30 page

LTC7000A

Rev. 0

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PIN FUNCTIONS

TGUP (Pin 12/Pin 10): High Current Gate Driver

Pull-Up. This pin pulls up to BST. Tie this pin to TGDN

for maximum gate drive transition speed. A resistor

can be connected between this pin and the gate of the

external MOSFET to control the in-rush current during

turn-on. See Applications Information.

TS (Pin 13/Pin 11): Top (High Side) source connec-

tion or GND if used in ground referenced applications.

BST (Pin 14/Pin 12): High Side Bootstrapped Supply.

An external capacitor with a minimum value of 0.1µF

should be tied between this pin and TS. Voltage swing

on this pin is 12V to (VIN + 12V).

SNS– (Pin 15/Pin 14), SNS+ (Pin 16/Pin 16): Current

Sense Comparator Input. Place a sense resistor in series

with the drain of the external MOSFET to set the peak

current. The SNS– pin should be connected to the sense

resistor using a minimum 100Ω resistor. Use a Kelvin

connection from the SNS+ pin to the sense resistor. The

current comparator trip threshold voltage, ΔVTH is the

ISET voltage divided by 20. The trip threshold is inter-

nally clamped to a minimum of 20mV and a maximum

of 75mV. If ISET is open or greater than 2.0V, ΔVTH is set

internally to 30mV.

GND (Exposed Pad Pin 17): Ground. The exposed pad

must be soldered to the PCB for rated electrical and ther-

mal performance.

(LTC7000A/LTC7000A-1)

LTC4367 数据表(PDF) 10 Page - Analog Devices