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RT8237J
High Efficiency Single Synchronous Buck PWM Controller
General Description
The RT8237J PWM controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high
voltage batteries to generate low
voltage CPU core, I/O, and chipset RAM supplies in notebook computers.
The constant on-time PWM control scheme handles wide input/output
voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency.
The RT8237J achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs.
Efficiency is furt...