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RT8228A Datasheet Single Synchronous Buck Pwm Controller

Manufacturer: Richtek

Overview: ® RT8228A Single Synchronous Buck PWM Controller General.

Datasheet Details

Part number RT8228A
Manufacturer Richtek
File Size 194.96 KB
Description Single Synchronous Buck PWM Controller
Datasheet RT8228A-Richtek.pdf

General Description

The RT8228A 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 RT8228A achieves high efficiency at a reduced cost by eliminating the current sense resistor found in traditional current mode PWMs.

Key Features

  • Built in 1% 0.5V Reference Voltage.
  • Adjustable 0.5V to 3.3V Output Range.
  • Quick Load Step Response within 100ns.
  • 4700ppm/°C Programmable Current Limit by Low Side RDS(ON) Sensing.
  • 4.5V to 26V Battery Input Range.
  • Resistor Programmable Frequency.
  • Internal Ramp Current Limit Soft-Start Control.
  • Drives Large Synchronous Rectifier FETs.
  • Integrated Boost Switch.
  • Over/Under Voltage Protection.
  • Thermal Shutdown.
  • Power Good Indicator.
  • RoH.

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RT8228A Distributor