The RT7241A provides a complete power supply for DDR3/DDR3L/LPDDR3/DDR4 memory systems. It integrates an Advanced Constant On-Time (ACOT®) mode synchronous Buck converter with a 1.5A sink/source tracking linear regulator.
The PWM converter provides low quiescent supply 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 ACOT® control scheme handles wide input/output voltage ratios with ease and provides a very fast response to load transients with no external compensators.
The 1.5A sink/source VTT LDO maintains fast transient response only requiring 10μF ceramic output capacitance. The RT7241A supports all of the sleep state controls placing VTT at high-Z in S3 and discharging VDDQ and VTT in S4/S5.
The RT7241A provides complete protection features including OCP, OVP, UVP, and thermal shutdown. The RT7241A is available in the UQFN-18L 3x4 package.
Applications
- DDR3/DDR3L/LPDDR3/DDR4 Memory Power Supplies
- Notebook computers