MPQ2967

– DUAL-LOOP, DIGITAL, 4-PHASE VR CONTROLLER, AEC-Q100

MPQ2967 Rev. 1.1

MonolithicPower.com

4

1/22/2025

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© 2025 MPS. All Rights Reserved.

PIN FUNCTIONS

Pin #

Name

I/O

Description

1

CSBIASB

A [I]

Biased voltage for IMON on rail B. If the CSBIASB pin is not required, it should

not have a connection.

2

VDD33

A [I/O]

3.3V LDO output for the internal power supply. Connect a 4.7µF bypass

capacitor from the VDD33 pin to the ground.

3

PWM4

D [O]

Tri-state PWM output for phase 4.

4

PWM3

D [O]

Tri-state PWM output for phase 3.

5

DRONB

D [O]

Digital output to indicate to the Intelli-PhaseTM whether to enable or enter

low-power mode for rail B.

6

DRONA

D [O]

Digital output to indicate to the Intelli-PhaseTM whether to enable or enter

low-power mode for rail A.

7

PWM2

D [O]

Tri-state PWM output for phase 2.

8

PWM1

D [O]

Tri-state PWM output for phase 1.

9

SDA

D [I/O]

Data signal between the PMBus controller and voltage regulator (VR)

controller.

10

SCL

D [I]

Source synchronous clock from the PMBus controller.

11

NIRQ

D [O]

Fault interrupt output.

12

PGOODA

D [O]

Power good output for rail A.

13

ENA

D [I]

Enable control for rail A.

14

VBOOT

A [I]

Boot voltage strap for rail A and rail B.

15

PWMVIDA

D [I]

PWMVID input for rail A.

16

PGOODB

D [O]

Power good output for rail B.

17

PWMVIDB

D [I]

PWMVID input for rail B.

18

PSIA

D [I]

Power-saving input for rail A.

19

PSIB

D [I]

Power-saving input for rail B.

20

ENB

D [I]

Enable control for rail B.

21

VSPA

A [I]

Positive remote voltage sense input for rail A. Directly connect the VSPA pin

to the VR

’s output voltage at the load. Differentially route VSPA with VSNA.

22

VSNA

A [I]

Remote voltage sensing return input for rail A. Directly connect the VSNA pin

to ground at the load. Differentially route VSNA with VSPA.

23

CS1

A [I]

Current-sense input for phase 1. Float the CS pin of any unused phase(s).

24

CS2

A [I]

Current-sense input for phase 2. Float the CS pin of any unused phase(s).

25

IMONA

A [I/O]

Analog total load current signal of rail A. The IMONA pin sources a current

proportional to the sensed total load current of rail A. Connect an external resistor

from IMONA to AGND to configure the gain.

26

IMONB

A [I/O]

Analog total load current signal of rail B. The IMONB pin sources a current

proportional to the sensed total load current of rail B. Connect an external resistor

from IMONB to AGND to configure the gain.

27

CS3

A [I]

Current-sense input for phase 3. Float the CS pin of any unused phase(s).

28

CS4

A [I]

Current-sense input for phase 4. Float the CS pin of any unused phase(s).

29

PE

D [I]

Program enable. The PE pin is the program enable input for MTP configurations.

30

FSW

A [I]

Strap for switching frequency (fSW) selection.

31

VSNB

A [I]

Remote voltage sensing return input for rail B. Directly connect the VSNB pin

to ground at the load. Differentially route VSNB with VSPB.