RT3607BC datasheet(3/60 Pages) RICHTEK

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RT3607BC

DS3607BC-01 June 2018

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Pin No

Pin Name

Pin Function

SET3

3rd platform setting. Platform can use this pin to set DVID width, QRWIDTH and

Enable PSYS function for Main VR and AXG VR.

SETA1

1st platform setting. Platform can use this pin to set DVID threshold and ICCMAX for

AXG rail VR.

SETA2

2nd platform setting. Platform can use this pin to set Ramp Setting, QRTH, and OCS

for AXG rail VR.

IMON

CORE rail VR current monitor output. This pin outputs a voltage proportional to the

loading current.

VREF

Fixed 0.6V output reference voltage. This voltage is only used to offset the output

voltage of IMON pin. Between this pin and GND must be placed a RC circuit with R

= 3.9

 and C = 0.47F.

IMONA

AXG rail VR current monitor output. This pin outputs a voltage proportional to the

loading current.

VR_HOT

Thermal monitor output. This pin is active low.

ALERT

SVID alert. (Active low)

VDIO

VR and CPU data transmission interface.

VCLK

Synchronous clock from the CPU.

VR enable control input.

OFSM

Output voltage offset setting for CORE rail VR.

OFSA/PSYS

Output voltage offset setting for AXG rail VR and system input power monitor. Place

the PSYS resistor as close to the IC as possible. User can disable PSYS function

by simply connecting PSYS pin to GND and SET3 pin setting disable PSYS

function.

VCC

Controller power supply. Connect this pin to 5V and place a decoupling capacitor

2.2

F at least. The decoupling capacitor is placed as close to VR controller as

possible.

IBIAS

Internal bias current setting. Connect a 100k

 resistor from this pin tied to GND to

set the internal current. Don’t connect a bypass pass capacitor from this pin to GND.

RGNDA

Return ground for AXG rail VR. This pin is the negative node of the differential remote

voltage sensing.

VSENA

AXG rail VR voltage sense input. This pin is connected to the terminal of AXG rail

VR output voltage.

COMPA

AXG rail VR COMPENSATION. This pin is the error amplifier output pin.

FBA

Negative input of the error amplifier. This pin is for AXG rail VR output voltage

feedback to controller.

40, 39

ISENA[1:2]P Positive current sense input of multi-phase AXG rail VR channel 1, 2.

41, 38

ISENA[1:2]N Negative current sense input of multi-phase AXG rail VR channel 1, 2.

TSENA

Thermal sense input for AXG rail VR.

TONSETA

AXG rail VR on-time setting. An on-time setting resistor is connected from this pin to

input voltage.

DVD

Divided input voltage detection of power stage. Connect this pin to a voltage divider

from input voltage of power stage to detect input voltage.

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