MP2953B – DIGITAL PWM CONTROLLER WITH PMBUS FOR VR12.5

MP2953B Rev. 1.01

www.MonolithicPower.com

13

10/9/2015

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© 2015 MPS. All Rights Reserved.

OPERATION

The MP2953B is a digital multi-phase VR12.5

compliant controller for Intel microprocessors. It

operates in 1-, 2-, 3-, 4-, 5-, or 6-phase. It

contains blocks of precision DAC and ADC,

differential remote voltage sense amplifier, fast

comparators, current sense amplifiers, internal

loop

compensation,

load-line

setting,

VR_Ready monitor, temperature monitor,

PMBus interface, SVID interface, and EEPROM

for custom configuration.

Fault protection features include under-voltage

lockout (Vin-UVLO), over-current protection

(OCP), over-voltage protection (OVP), under-

voltage protection (UVP), over-temperature

protection

(OTP),

and

reverse-voltage

protection (RVP).

PWM Generator

& Phase Interleaving

& Power State

Protection &

FAULT Monitor

Sensing

& Monitor

Current Balancing

& Vout DC Calibration

x1

FB

TEMP

VINSEN

PMBus Interface

& Register

MEMORY

(EEPROM)

VORTN

VOSEN

CS3

CS1

CS2

CS4

MUX

ADC

VDIFF

CS5

CS6

SVID Interface

& Register

Reference Generator &

Internal Loop Compensation

Power Vcc

& Oscillator

VDD18

VDD33

EN

VDD50

AGND

DGND

DAC

DAC

VID

VOSEN

OV1

OV2

UV

RV

30mV

VDIFF

OCP_LIM

CS1

OC1

OC2

OC3

OC6

OC4

OC5

CS2

CS4

CS5

CS6

CS3

CM

CM

CM

CM

CM

CM

CM

DAC

DAC

OVP_LIM

VID+300mV

CM

CM

CM

VID-300mV

SDA_P

SCL_P

ALT_P#

IREF

CS_SUM

IMON

ADDR_S

ADDR_P

VBOOT

VFS

VRFLT#

SCLK

SDIO

ALT#

VRRDY

VRHOT#

vr_settle

CM

VID-20mV

DAC

1.23V

1:8

1:32

Σ-

ADC

FIGURE 1. System Functional Block