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