Dual And Combinable QPWM Graphics Core Controllers For Notebook Computers

The MAX17007 MAX17008 are dual Quick-PWM step- down controllers intended for general power generation in battery-powered systems. The two switched-mode power supplies (SMPSs) CAN also be combined to oper- ate in a two-phase single-output mode. Constant on- time Quick-PWM operation provides fast response to load transients and handles wide input/output (I/O) volt- age ratios with ease, while maintaining a relatively con- stant switching frequency. The switching frequency CAN be individually adjusted between 200kHz and 600kHz with external resistors. Differential output current sens- ing allows output sense-resistor sensing for an accurate current limit, or lossless inductor direct-current resis- tance (DCR) current sensing for lower power dissipation while maintaining 0.7% output accuracy. Overvoltage MAX17007 only), undervoltage protection, and accu- rate user-selectable current limits (15mV, 30mV, 45mV, and 60mV) ensure robust operations. By Maxim Integrated Products