RT8867A Datasheet, PDF (7/21 Pages) Richtek Technology Corporation – Advanced 4/3-Phase PWM Controller for CPU Core Power

RT8867A
Pin No.
26, 30, 35
27, 29, 34
28
33
38 to 45
46
47
48
49
(Exposed pad)
Pin Name
PHASE3,
PHASE2,
PHASE1
LGATE3,
LGATE2, LGATE1
VCC12B
VCC12A
VID7 to VID0
FBRTN
VRSEL
VR_RDY
GND
Pin Function
Switch Nodes of High Side Driver 3, Driver2 and Driver1. Connect this
pin to high side MOSFETs sources together with the low side MOSFETs
drains and inductor.
Lower Gate Drivers for Phase 3, Phase 2 and Phase 1. This pin drives
the gate of low side MOSFETs.
Supply Input Pin. This pin supplies current for phase 2 and phase 3 gate
drivers.
Supply Input Pin. This pin supplies current for phase 1 gate driver and
control circuits.
Voltage Identification Input for DAC.
Return Ground Pin. This pin is negative node of the differential remote
voltage sensing.
Load Line Adjustment Enable Pin. Connect this pin to VTT to disable load
line adjustment function or connect this pin to GND to enable load line
adjustment function.
VR Ready Indication.
The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8867A-01 August 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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