RT3661AB
Pin No.
Pin Name
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.
34
35
36
PVCC
Lower gate driver output of VDD controller. Connect this pin to the gate input
of low side MOSFET.
LGATE
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.
PHASE
Upper gate driver output of VDD controller. Connect this pin to the gate input
of high side MOSFET.
37
38
UGATE
BOOT
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.
41 (Exposed Pad) GND
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS3661AB-05 May 2019
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
