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RT6542A - High Efficiency Single Synchronous Buck PWM Controller

General Description

The RT6542A 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.

Key Features

  • Intel Cannon 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 Range.
  • Internal Voltage Ramp Soft-Start Control.
  • Drives Large Synchronous Rectifier FETs.
  • Integrated Boost Switch.
  • Over/Under-Voltage Protection.
  • Thermal Shutdown.
  • Power Good In.

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Datasheet Details

Part number RT6542A
Manufacturer Richtek
File Size 261.27 KB
Description High Efficiency Single Synchronous Buck PWM Controller
Datasheet download datasheet RT6542A Datasheet

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® RT6542A High Efficiency Single Synchronous Buck PWM Controller General Description The RT6542A 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 RT6542A supports on chip voltage programming function between 0.85V 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 RT6542A achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs.