LT8705 datasheet(8/24 Pages) LINER

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LT3840

3840fa

For more information www.linear.com/LT3840

pin FuncTions (TSSOP/QFN)

TG (Pin 22/Pin 25): TG is the high current gate drive for

the top N-channel MOSFET.

BOOST (Pin 23/Pin 26): BOOST is the supply for the

bootstrapped TG gate drive and is externally connected

to a low ESR ceramic capacitor referenced to SW.

BGRTN (Pin 24/Pin 28): BGRTN is the high current return

path of the BG MOSFET driver and is externally connected

to the negative terminal of the INTVCC capacitor.

BG (Pin 25/Pin 29): BG is the high current gate drive for

the bottom N-channel MOSFET.

INTVCC(Pin26/Pin30):INTVCCistheauxiliarybiassupply

output. Bypass the pin with a low ESR capacitor placed

closetothepin.INTVCCprovidessupplyforLT3840internal

bias and MOSFET gate drivers. The INTVCC pin cannot be

back driven with a separate supply.

AUXSW2 (Pin 27/Pin 33): AUXSW2 is a switching node

of the auxiliary supply and is connected to the auxiliary

bias supply inductor.

AUXBST (Pin 28/Pin 35): AUXBST provides drive voltage

for the auxiliary supply and is connected to a low ESR

capacitor referenced to AUXSW1.

LT8705 Datasheet(PDF) 8 Page - Linear Technology