RT3661AB
Pin No.
34
Pin Name
PVCC
Pin Function
Driver power supply. Connect this pin to GND by the 2.2F ceramic
capacitor at least. The decoupling capacitor is as close controller as
possible.
Lower gate driver output of VDD controller. Connect this pin to the gate input
of low side MOSFET.
Switch nodes of high side driver for VDD controller. Connect this pin to high
side MOSFET Source together with the low side MOSFET Drain and the
inductor.
Upper gate driver output of VDD controller. Connect this pin to the gate input
of high side MOSFET.
Bootstrap supply of VDD controller for high side MOSFET. This pin powers
high side MOSFET driver.
Ground. The exposed pad must be soldered to a large PCB and connected
to GND for maximum power dissipation.
35
LGATE
36
PHASE
37
38
UGATE
BOOT
41 (Exposed Pad) GND
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4
DS3661AB-05
May
2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
