MAX17000A
Description
The MAX17000A pulse-width modulation (PWM) controller provides a plete power solution for notebook DDR, DDR2, and DDR3 memory. It prises a stepdown controller, a source-sink LDO regulator, and a reference buffer to generate the required VDDQ, VTT, and VTTR rails.
The VDDQ rail is supplied by a step-down converter using Maxim’s proprietary Quick-PWM™ controller. The high-efficiency, constant-on-time PWM controller handles wide input/output voltage ratios (low duty-cycle applications) with ease and provides 100ns response to load transients while maintaining a relatively constant switching frequency. The Quick-PWM architecture circumvents the poor load-transient timing problems of fixed-frequency current-mode PWMs while also avoiding the problems caused by widely varying switching frequencies in conventional constant-on-time and constant-off-time PWM schemes. The controller senses the...
