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