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RT8231A - Complete DDR Memory Power Supply Controller

General Description

The RT8231A/B provides a complete power supply for DDR2/DDR3/DDR3L/LPDDR3/DDR4/LPDDR4 memory systems.

It integrates a synchronous PWM Buck controller with a 1.5A sink/source tracking linear regulator and buffered low noise reference.

Key Features

  • PWM Controller  Adjustable Current Limit with Low-Side RDS(ON) Sensing  Low Quiescent Supply Current  Quick Load-Step Response within 100ns  1% VVDDQ Accuracy Over Line and Load  Adjustable 0.675V to 3.3V Output Range for 1.8V (DDR2), 1.5V (DDR3), 1.35V (DDR3L), 1.2V (LPDDR3), 1.2V (DDR4) and 1.1V (LPDDR4)  4.5V to 26V Battery Input Range  Resistor Adjustable Frequency  Over-/Under-Voltage Protection  Internal Voltage Ramp Soft-Start  Drives Large Synchronous Rectifier MOSFETs .

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Datasheet Details

Part number RT8231A
Manufacturer Richtek
File Size 300.13 KB
Description Complete DDR Memory Power Supply Controller
Datasheet download datasheet RT8231A Datasheet

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® RT8231A/B Complete DDR Memory Power Supply Controller General Description The RT8231A/B provides a complete power supply for DDR2/DDR3/DDR3L/LPDDR3/DDR4/LPDDR4 memory systems. It integrates a synchronous PWM Buck controller with a 1.5A sink/source tracking linear regulator and buffered low noise reference. The PWM controller provides the low quiescent current, high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage 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.