RT8885A 데이터 시트보기 (PDF) - Richtek Technology
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RT8885A
Richtek Technology
RT8885A Datasheet PDF : 59 Pages
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Pin No.
45
Pin Name
PHASE1
46
LGATE1
47
PVCC1
48
LGATE2
49
PHASE2
50
UGATE2
51
BOOT2
52
PVCC2
53
LGATEA
54
PHASEA
55
UGATEA
56
BOOTA
57
(Exposed Pad)
PGND
RT8885A
Pin Function
CORE VR Channel 1 Switching Node Connection Pin. Connect this pin to
the joint of high side MOSFET sources, the low side MOSFET drains and
the inductor of channel 1.
CORE VR Channel 1 Low Side MOSFET Gate Driver Output. Connect
this pin to the gate of low side MOSFET of channel 1.
CORE VR Embedded MOSFET Driver Power Supply Pin. This pin
powers channel 1 and channel 2 MOSFET gate drivers. Connect this pin
to GND with a ceramic capacitor larger than 1μF.
CORE VR Channel 2 Low Side MOSFET Gate Driver Output. Connect
this pin to the gate of low side MOSFET of channel 2.
CORE VR Channel 2 Switching Node Connection Pin. Connect this pin to
the joint of high side MOSFET sources, the low side MOSFET drains and
the inductor of channel 2.
CORE VR Channel 2 High Side MOSFET Floating Gate Driver Output.
Connect this pin to the gate of high side MOSFET of channel 2.
CORE VR Channel 2 Bootstrap Flying Capacitor Connection Pin. This pin
powers channel 2 high side MOSFET drivers. Connect this pin to
PHASE2 pin with a ceramic capacitor.
GFX VR Embedded MOSFET Driver Power Supply Pin. Connect this pin
to GND with a ceramic capacitor larger than 1F.
GFX VR Channel 1 Low Side MOSFET Gate Driver Output. Connect this
pin to the gate of low side MOSFET of channel 1.
GFX VR Channel 1 Switching Node Connection Pin. Connect this pin to
the joint of high side MOSFET sources, the low side MOSFET drains and
the inductor of channel 1.
GFX VR Channel 1 High Side MOSFET Floating Gate Driver Output.
Connect this pin to the gate of high side MOSFET of channel 1.
GFX VR Channel 1 Bootstrap Flying Capacitor Connection Pin. This pin
powers channel 1 high side MOSFET drivers. Connect this pin to
PHASEA pin with a ceramic capacitor.
Power Ground. The exposed pad is the return ground of all low side
MOSFET gate drivers. This exposed pad must be soldered to a large
PCB and connected to GND for maximum power dissipation.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS8885A-01 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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