2023.04.19 p. 1

Primarion VR Chipset

• Up to 2 MHz switching • 1 to 6 phases• Reduced output cap

– 100A, 1000A/us with 500uF MLCC• Current sense calibration

– Built-in cal on startup• Digital temperature compensation• I2C interface

– Monitor I,V, T, faults– Real-time voltage control

• Use with discrete or integrated power stage

• +3.3V supply, QFN package

• 30A Power Stage• Integrated control FET and drivers• Integrated current and temp sensor• Discrete sync FET

– Customize for each application• CSP package

– Lead or lead-free available

PX3520Integrated Power Stage

PX3511 Driver• High performance FET Driver

– 3.3V Logic compatible• “A” Version:

– Variable low-side drive• “B” Version:

– Variable low and high-side driver

PX3538/9Digital Controllers

2023.04.19 p. 2

PX3538 6-phase Controller

Block Diagram

• Integrated voltage and current digitizers

• Programmable digital control loop

• Programmable fault settings

• Integrated non-volatile memory

2023.04.19 p. 3

PX3525 Integrated Power Stage

•Integrated high and low-side current sensor

– Process and temp insensitive

•Pulse-by-pulse OCP•Integrated temp sensor•Low RDSon FETs

– 15 mOhm high-side– 2 mOhm low-side

•30A per phase – 20% duty factor

•CSP package

PWM

ISENSE

VCC

VSW

TemperatureSense TEMP

HS ShortDetect

HSSVSW

Signal GND

Referenceand POR

PWM

I-senseandOCP

Logic andNon-overlap

Control

Driver

3.3V

PGND

Driver

Boot

VCC

I-Limit

2023.04.19 p. 4

2023.04.19 p. 5

Low Cost VR Solutions• VR11 Applications

– 0.8 to 1.6V– 1200A/us

• 6-phase digital controller– Self calibrating current sense– Low output cap technology– I2C bus for monitoring & control

• Discrete drivers and FETs

Discrete 2U VRM solution 82% Efficiency at 1.25V & 130A

2023.04.19 p. 6

High Current Density VR Solutions• VR11 Applications

– 0.8 to 1.6V– 1200A/us

• 6-phase digital controller– Self calibrating current sense– Low output cap technology– I2C bus for monitoring & control

• Integrated Power Stage & FET

Integrated 1U VRM solution 84% Efficiency at 1.25V & 130A

Integrated VRD Solution87% Efficiency at 1.2V & 130A

2023.04.19 p. 7

VR Power Code User Interface

• Easy to use GUI• Runs on any PC with

USB interface• Configure system

parameters• Monitor telemetry and

faults• Fine tune feedback

loop and set fault trip thresholds

2023.04.19 p. 8

PX3542 Graphics Controller Features

• 4- to 6-phase operation • Maximum current: 150A • Output voltage: 0.5V - 1.6V• Switching frequency: 100 kHz to 2 MHz• Internal high precision voltage reference

10mV voltage setpoint accuracy

• Startup and maximum voltages set through external resistor (tamper resistant)

– 2-bit VID input for final voltage set• Programmed in NVM, vmax resistor limits max output

• “Plug and play” extra phases– Driver detect prior to soft-start disables unpopulated phases– Phase dropping based on current balance

2023.04.19 p. 9

PX3542 Graphics Controller Features• Programmable current balance offset (+/- 10%) for

thermal balancing• Digitally programmable loadline and loop compensation• Digital temperature sensor compensation• Active Transient Response (ATR) enables meeting

transient requirements with reduced output capacitance• I2C-bus interface for monitoring, control and

configuration– Current & Voltage readout– Query “Fault” details (out of balance channel etc.)

• Internal NVM to store custom configurations with eight programmable active voltage position (AVP) system configurations

• RoHS compliant 48-ld QFN package

2023.04.19 p. 10

PX3542 Fault Detection Capability

• Extensive fault detection capability with two user configurable output fault pins

– Input Under-voltage

– Output Under-/Over-voltage

– Per Phase and Total Output Current

– Current balance

– Auxiliary 12V supply • (both fault and return reported)

– Multiple Internal and External Temperature Limits

2023.04.19 p. 11

PX3542 Graphics Application Example

VCC

+12V main

+12V (+5V opt)

+3.3V

4.7F

8

7

5

6

1

2

4

3

PX3511

UGATE

BOOT

PWM

GND

PHASE

PVCC

VCC

LGATE

4.7F

8

7

5

6

1

2

4

3

PX3511

UGATE

BOOT

PWM

GND

PHASE

PVCC

VCC

LGATE

4.7F

8

7

5

6

1

2

4

3

PX3511

UGATE

BOOT

PWM

GND

PHASE

PVCC

VCC

LGATE

4.7F

8

7

5

6

1

2

4

3

PX3511

UGATE

BOOT

PWM

GND

PHASE

PVCC

VCC

LGATE

RTHERM

RTN

FromGPU

I2C I/F

ToGPU

FaultOutputs

PX3542

V12_SEN

GND

PWM1

IS1P

IS1N

PWM2

IS2P

IS2N

PWM3

IS3P

IS3N

PWM4

IS4P

IS4N

PWM5

IS5P

IS5N

PWM6

IS6P

IS6N

TEMP_SEN

VSENP

VSENN

V12_AUX1

V12_AUX2

VDD

VSTART

VMAX

VIDEN_N

VID1

VID0

OUTEN

VR_READY

FAULT1

FAULT2

SDA

SCL

SADDR1

SADDR0

`

+12V aux

2023.04.19 p. 12

Low Cost Graphics Solutions

• High End Graphics Applications– 0.5V to 1.6V– up to 2MHz switching freq– 150A max

• 6-phase digital controller– Self calibrating current sense– Low output cap technology– I2C bus for monitoring & control– Auto driver detect– Auto current balance phase drop

• Discrete drivers and FETs

Discrete VRD solution 84% Efficiency at 1.25V & 130A

2023.04.19 p. 13

GPU Power Code User Interface

• Easy to use GUI• Runs on any PC with

USB interface• Configure system

parameters• Monitor telemetry and

faults• Fine tune feedback

loop and set fault trip thresholds

2023.04.19 p. 14

Di-POLTM PX7510 Block Diagram

PID/PWMController

Current Sense

TempSense

Reference &

Oscillator

SMBusNon-Volatile Memory

(NVM)

Fault Handler

State Machine

IOUT/ISH

SMB_AL_N

SCLKSDATA

FSET

FAULT1

ADC

VSET

PWM

SADDR

VCC

PWRGD

MUX

OUTEN

TEMPSEN

ISENP

VSENNVSENP

ISENN

V12SEN

Voltage Sense

SYNC_IN

VTRIM

IMAXSET

DAC

FAULT2

SYNC_OUT

ISH_GND

2023.04.19 p. 15

Di-POLTM PX7510 Application ExampleSingle-Phase POL Converter

VOUT

RTN

PMBus I/F

PowerManagement

I/F

FaultOutputs

+5V

PX7510

VCC

GND

PWM

ISENN

ISENP

SDATA

SCLK

SMB_ALRT_N

PWRGD

OUTEN

SYNC_IN

SYNC_OUT

VSENP

VSENN

TEMPSEN

ISH_GND

FAULT1

FAULT2

VSET

FSET

VTRIM

IMAXSET

V12SEN

MultiphaseOperation

+5V to +12V

LOAD

IOUT/ISHI-share

SADDR

RSENSE

RBCB

D1RCM

R1

R2

4.7F

8

7

5

6

1

2

4

3

UGATE

BOOT

PWM

GND

PHASE

EN

VCC

LGATE