RT8208A/RT8208B

Description

The constant-on-time PWM control scheme handles wide input/output ratios with ease and provides 100ns "instant-on" response to load transient while maintaining a relatively constant frequency. It provides the high efficiency, excellent transient response, and DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core, graphics, I/O and chipset RAM supplies in notebook computers.
The RT8208A/B achieves high efficiency at a reduced cost by eliminating the current-sense resistor in traditional current-mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The buck conversion allows this device to directly step down from high-voltage batteries for the highest possible efficiency. Additional features include soft-start, under-voltage protection, programmable over-current protection and non-overlapping gate drive.The RT8208A/B is available in a WQFN-16L 3x3 package.