MAX17409 Datasheet | Maxim Integrated

Description 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 pensation 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. Features o 1-Phase Quick-PWM Controller o ±6m V VOUT Accuracy Over Line, Load, and Temperature o o o o o o o o o o 6-Bit Graphics DAC (12.5m V LSB) Active Voltage Positioning with Adjustable Gain Accurate Droop and Current Limit Remote Output and Ground Sense Buffered 2V Reference Output for Offsets Power-Good Window parator Temperature parator Drives Large Synchronous Rectifier FETs 2V to 26V Power Input Range Adjustable Switching Frequency (600k Hz max) MAX17409 o Output Overvoltage and Undervoltage Protection o Soft-Startup and Soft-Shutdown o Internal Boost Diodes 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 PART MAX17409GTI+ Ordering Information TEMP RANGE -40°C to +105°C PIN-PACKAGE 28 TQFN-EP- +Denotes a lead(Pb)-free/Ro HS-pliant package. - EP = Exposed...