MAX17409,pdf,datasheet (1-Phase Quick-PWM NVIDIA CPU Controller)

The MAX17409 is a 1-phase Quick-PWM? step-down
VID power-supply controller for NVIDIA? graphics power.
The Quick-PWM control provides instantaneous response
to fast-load current steps. Active voltage positioning
reduces power dissipation and bulk output capacitance
requirements and allows ideal positioning compensation
for tantalum, polymer, or ceramic bulk output capacitors.
The MAX17409 is intended for two different notebook
processor core applications: either bucking down the battery
directly to create the core voltage, or bucking down
the +5V system supply. The single-stage conversion
method allows this device to directly step down high-voltage
batteries for the highest possible efficiency.
Alternatively, 2-stage conversion (stepping down the +5V
system supply instead of the battery) at higher switching
frequency provides the minimum possible physical size.
A slew-rate controller allows controlled transitions
between VID codes. A thermistor-based temperature
sensor provides programmable thermal protection.
The MAX17409 is available in a 28-pin, 4mm x 4mm
TQFN package.
Applications
NVIDIA GPU Core Power Supplies
Voltage-Positioned Step-Down Converters
2-to-4 Li+ Cells Battery to Processor Core
Supply Converters
Notebooks/Desktops/Servers