LT3840
pin FuncTions (TSSOP/QFN)
TG (Pin 22/Pin 25): TG is the high current gate drive for
the top N-channel MOSFET.
INTV (Pin26/Pin30):INTV istheauxiliarybiassupply
CC CC
output. Bypass the pin with a low ESR capacitor placed
closetothepin.INTV providessupplyforLT3840internal
CC
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.
bias and MOSFET gate drivers. The INTV pin cannot be
CC
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.
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 INTV capacitor.
CC
AUXBST (Pin 28/Pin 35): AUXBST provides drive voltage
for the auxiliary supply and is connected to a low ESR
capacitor referenced to AUXSW1.
BG (Pin 25/Pin 29): BG is the high current gate drive for
the bottom N-channel MOSFET.
3840fa
8
For more information www.linear.com/LT3840
Linear [ Linear ]
