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RT8237A - High Efficiency Single Synchronous Buck PWM Controller

General Description

The RT8237A/B 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

  • Wide Input Voltage Range : 4.5V to 26V.
  • Output Voltage Range : 0.7V to 3.3V.
  • Built-in 0.5% 0.7V Reference Voltage.
  • Quick Load-Step Response within 100ns.
  • 4700ppm/°C Programmable Current Limit by Low Side RDS(ON) Sensing.
  • 4 Selectable Frequency Setting.
  • Soft-Start Control.
  • Drives Large Synchronous-Rectifier FETs.
  • Integrated Boot Switch.
  • Built-in OVP/OCP/UVP.
  • Thermal Shutdown.
  • Power Good Indicator.
  • RoHS Compliant and Halogen Free Ap.

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Datasheet Details

Part number RT8237A
Manufacturer Richtek
File Size 206.70 KB
Description High Efficiency Single Synchronous Buck PWM Controller
Datasheet download datasheet RT8237A Datasheet

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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.

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® RT8237A/B High Efficiency Single Synchronous Buck PWM Controller General Description The RT8237A/B 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 RT8237A/B achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs.