General Description
The uP9512 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 uP9512
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 uP9512 supports NVIDIA Open Voltage Regulator type
4i+ 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 uP9512 supports Advanced DrMOS power module with
current reporting function (DrMOS) application. The
REFOUT provides an input reference voltage for DrMOS’s
REFIN pin. The uP9512 uses the current reporting signal
of DrMOS for channel current balancing. The uP9512 also
provides hardware setting to adjust the operating phase
number in different load current state.
Other features include adjustable soft-start, channel current
limit, under voltage protection, over voltage protection and
power good output. The uP9512 is available in a VQFN5x5-
40L package.