General Description
The uP9512S is a 4/3/2/1-phase PWM controller specifically
designed to provide high-precision output voltage system
for next generation GPUs. The uP9512S 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 uP9512S supports NVIDIA Open Voltage Regulator
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
integrated SMBus interface provides user the flexibility to
optimize the performance and efficiency.
The uP9512S uses per-channel inductor DCR current
sensing for channel current balance and channel current
limit. The continuous total DCR current sensing is used
for load line programming and total output current protection.
The uP9512S also provides hardware setting to adjust the
operating phase number in different load current state.
Other features include under voltage protection, over voltage
protection and power good output. The uP9512S is available
in a WQFN4x4-32L package.

Features
† Support NVIDIA’s PWMVID Technology
† SMBus Interface for Performance and Efficiency
Optimization
„ Dynamic Programmable VR Parameters
„ Programmable Protection Thresholds
„ VR Output Reporting
† Selectable 4/3/2/1-Phase Operation by Hardware
Setting
† Support up to 2MHz Operation Frequency
† Continuous Inductor DCR Current Sensing
† Auto-Phase Shedding
† Power State Input (PSI)
† Power Good Indication
† Channel Current Limit Protection
† Total Output Over Current Protection
† Over/Under Voltage Protection
† Over Temperature Protection
† RoHS Compliant and Halogen Free