LT8350SAVPBF datasheet(17/36 Pages) AD

17 / 36 page

Data Sheet

LT8350S

analog.com

Rev. A

17 of 36

NAME

DESCRIPTION

LOADTG

High-Side PMOS Load Switch Top Gate Drive. The LOADTG pin produces a buffered

and inverted version of the LOADEN input signal and drives an external high-side

PMOS load switch with a voltage swing from the higher voltage between (VOUT−5V)

and 1.2V to VOUT. Leave this pin open if not used.

24, 25

VOUT

Power Output. The VOUT pins connect to the power output of the converter, and

also serve as the positive rail for the LOADTG drive. Bypass this pin to ground with

a ceramic capacitor. The bypass capacitor should be placed as close to the chip as

possible with vias directly down to the ground plane.

27, 28

SW2

Boost Side Switch Node. The SW2 pins connect to the internal power switches, and

swing from ground to a diode voltage above VOUT. Do not force any voltage on

these pins.

BST2

Boost Side Bootstrap Floating Driver Supply. The BST2 pin connects to an

integrated bootstrap diode and capacitor from the INTVCC pin and supplies the

boost side top power switch gate driver. Do not connect anything to this pin.

BST1

Buck Side Bootstrap Floating Driver Supply. The BST1 pin connects to an

integrated bootstrap diode and capacitor from the INTVCC pin and supplies the

buck side top power switch gate drive. Do not connect anything to this pin.

31, 32

SW1

Buck Side Switch Node. The SW1 pins connect to the internal power switches, and

swing from a diode voltage drop below ground up to VIN. Do not force any voltage

on these pins.

33, 34,

35, 36

GND

Ground. Solder the exposed pads directly to the ground plane.

Corner Pins

These pins are for mechanical support only and can be connected anywhere on the

Printed Circuit Board (PCB).

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