General Description

The uP9511R is an 8/7/6/5/4/3/2/1-phase PWM controller

specifically designed to provide high-precision output

voltage system for next generation GPUs. The uP9511R

provides programmable output voltage and active voltage

positioning functions to adjust the output voltage as a

function of the load current, so it is optimally positioned

for a load current transient.

The uP9511R supports NVIDIA Open Voltage Regulator 8

with PWMVID feature. The PWMVID input is buffered and

filtered to generate accurate reference voltage and the output

voltage is precisely regulated to the reference input.

The uP9511R adopts continuous total DCR current sensing

for load line programming. The uP9511R provides hardware

setting to adjust the operating phase number in different

load current state. The uP9511R uses MOSFET RDS(ON)

current sensing for channel current balance.

Other features include adjustable soft-start, channel current

limit, under voltage protection, over voltage protection and

power good output. The uP9511R is available in VQFN5x5-

40L package.

Features

† Support NVIDIA’s Open VReg Type 8 PWMVID

Technology

† Selectable 8/7/6/5/4/3/2/1-Phase Operation by

Hardware Setting

† Differential Remote Voltage Sensing

† Continuous Inductor DCR Current Sensing Voltage

Adjustment

† Switching Frequency Adjustment

† Operating Phase Number Adjustment

† Adjustable Current Balancing by RDS(ON) Current

Sensing

† Adjustable Soft-Start

† Optimize for Phase Extension Application

† Channel Current Limit Protection

† Over/Under Voltage Protection

† Over Temperature Protection

† RoHS Compliant and Halogen Free

Applications

† Middle-High End GPU Core Power Supplies