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RT6541A
High Efficiency Single Synchronous Buck PWM Controller
General Description
The RT6541A PWM controller provid...
®
RT6541A
High Efficiency Single Synchronous Buck PWM Controller
General Description
The RT6541A 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 RT6541A supports on chip
voltage programming function between 0.8V and 1.05V by controlling GX digital inputs.
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 RT6541A achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier
MOSFETs and enter diode emulation mode at light load condition. The buck conversion allows this device to directly step down high
voltage batteries at the highest possible efficiency. The RT6541A is intended for CPU core, chipset, DRAM, or other low
voltage supplies as low as 0.8V.
The RT6541A is available in a WDFN-14L 3x2 package.
Features
Intel SKL VR support Built-in 1% Reference
Voltage 2-Bit Programmable Output
Voltage with Integrated
Transition Support Support Intel LPM (Low-Power Mode) Feature 4700ppm/°C Programmable Current Limit by Low-
Side RDS(ON) Sensing 3V to 26V Battery Input Rang...