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RT6543B - High Efficiency Single Synchronous Buck PWM Controller

Download the RT6543B datasheet PDF. This datasheet also covers the RT6543A variant, as both devices belong to the same high efficiency single synchronous buck pwm controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The RT6543A/B PWM controller provides high efficiency, excellent transient response, and high DC output accuracy for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM.

Key Features

  • A High Efficiency Step-Down DC-DC Controller.
  • Built-in 1% Reference Voltage.
  • 2-Bit Programmable Output Voltage with Integrated.
  • Adjustable Switching Frequency.
  • Input Voltage Range : 3V to 24V.
  • Internal Soft-Start to Reduce Inrush Current.
  • Capability of Driving Large Synchronous Rectifier MOSFETs.
  • Power Good Indicator.
  • Cycle-by-Cycle Current Limit.
  • Over-/Under-Voltage Protection.
  • Thermal Shutdown.
  • RT6543A : Slew Down Mode as VID Change.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (RT6543A-Richtek.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number RT6543B
Manufacturer Richtek
File Size 333.21 KB
Description High Efficiency Single Synchronous Buck PWM Controller
Datasheet download datasheet RT6543B Datasheet

Other Datasheets by Richtek

Part Number Description
RT6543A High Efficiency Single Synchronous Buck PWM Controller
RT6541A High Efficiency Single Synchronous Buck PWM Controller
RT6541D High Efficiency Single Synchronous Buck PWM Controller
RT6541E High Efficiency Single Synchronous Buck PWM Controller
RT6542A High Efficiency Single Synchronous Buck PWM Controller
RT6545A Dual-Channel Synchronous DC/DC Step-Down Controller
RT6545B Dual-Channel Synchronous DC/DC Step-Down Controller
RT6515 10-Bit Programmable Gamma Reference
RT6551A Complete DDR Memory Power Supply Controller
RT6551B Complete DDR Memory Power Supply Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
® RT6543A/B High Efficiency Single Synchronous Buck PWM Controller for INTEL VCCIN AUX ICL and TGL General Description The RT6543A/B PWM controller provides high efficiency, excellent transient response, and high DC output accuracy for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM. The RT6543A/B supports on chip voltage programming function between 0V and 1.8V by controlling VID1/VID0 inputs. Compared with conventional current-mode PWMs, the RT6543A/B achieves high efficiency without any current sensing resistors. Furthermore, the RT6543A/B has ability to drive synchronous rectifier MOSFETs and enters diode emulation mode at light load condition that also save lots of power consumption.