RT8167A View Datasheet(PDF) - Richtek Technology

Part Name

Description

Manufacturer

RT8167A

Dual Single-Phase PWM Controller for CPU Core/GFX Power Supply

Richtek Technology 

®

RT8167A

Pin No.

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Pin Name

Pin Function

GFXPS2

VCC

SETINIA

Forced DEM Enable Setting of GFX VR. Connect to VCC for forced-DEM setting

and connect to GND for following SVID power state command.

5V Power Supply Input of Controller. Bypass this pin to GND with a 1μF or greater

ceramic capacitor.

Initial Startup Voltage VINI_GFX Setting of GFX VR. Connect to a resistive voltage

divider from VCC to GND to set the pin voltage VSETINIA for GFX VR initial startup

voltage VINI_GFX setting. Connect this pin to GND for 0V VINI_GFX setting.

SETINI

TMPMAX

ICCMAX

ICCMAXA

TSEN

OCSET

TSENA

OCSETA

IBIAS

Initial Startup Voltage VINI_CORE Setting of CORE VR. Connect to a resistive

voltage divider from VCC to GND to set the pin voltage VSETINI for CORE VR initial

startup voltage VINI_CORE setting. Connect this pin to GND for 0V VINI_CORE setting.

Maximum Temperature Setting of CORE VR. Connect to a resistive voltage divider

from VCC to GND to set the pin voltage VTMPMAX for TMPMAX setting.

Maximum Current Setting of CORE VR. Connect to a resistive voltage divider from

VCC to GND to set the pin voltage VICCMAX for ICCMAX setting.

Maximum Current Setting of GFX VR. Connect to a resistive voltage divider from

VCC to GND to set the pin voltage VICCMAXA for ICCMAXA setting.

Thermal Monitor Sense Pin of CORE VR.

Over Current Protection Setting of CORE VR. Connect to a resistive voltage divider

from VCC to GND to set the pin voltage VOCSET from 0 to 3.3V for CORE VR over

current protection threshold.

Thermal Monitor Sense Pin of GFX VR.

Over Current Protection Setting of GFX VR. Connect to a resistive voltage divider

from VCC to GND to adjust the pin voltage VOCSETA from 0 to 3.3V for GFX VR over

current protection threshold.

Internal bias current setting. Connect a 53.6kΩ resistor from IBIAS pin to GND.

VRHOT

VR_READY

Thermal Monitor Output (Active Low). Connect a pull high resistor from VRHOT pin

to 1.05V.

Voltage Ready Indicator of CORE VR. Connect a pull high resistor from

VR_READY pin to 1.05V.

VRA_READY

Voltage Ready Indicator GFX VR. Connect a pull high resistor from VRA_READY

pin to 1.05V.

DRPENA

ALERT

VDIO

VCLK

IMONFBA

IMONA

Droop Enable Mode Setting of GFX VR. An internal 80μA current source is

connected to DRPENA pin and flows out of this pin for 10μs. Connect this pin to

VCC to enable droop function. Connect this pin to GND to disable droop function.

SVID Alert Pin (Active Low). Connect a 75Ω resistor from ALERT pin to 1.05V.

Controller and CPU Data Transmission Interface. Connecting a 64.9Ω resistor

between VDIO pin to 1.05V.

Synchronous Clock from the CPU. Connect a 64.9Ω resistor from VCLK pin to

1.05V.

This pin is used to externally set the current monitor output gain of GFX VR.

Connect this pin with one resistor RIMONFBA to GFX VCC_SENSE while IMON pin

is connected to ground with another resistor RIMONA. The current monitor output

gain can be set by the ratio of these two resistors.

Current Monitor Output of GFX VR. The output voltage VIMONA of this pin is

proportional to the output current. For digital output current reporting, detailed

VIMONA is generated by built-in ADC.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

DS8167A-00 January 2012

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

3

Share Link: