®
RT8241E
High Efficiency Single Synchronous Buck PWM Controller
General Description
The RT8241E PWM controller provid...
®
RT8241E
High Efficiency Single Synchronous Buck PWM Controller
General Description
The RT8241E 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 RT8241E supports on chip
voltage programming function between 0.675V and 0.9V 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 RT8241E 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 RT8241E is intended for CPU core, chipset, DRAM, or other low
voltage supplies as low as 0.675V.
The RT8241E is available in a WQFN-12L 2x2 package.
Ordering Information
RT8241E
Package Type QW : WQFN-12L 2x2 (W-Type)
Lead Plating System Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note : Richtek products are :
` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
` Suitable fo...