ON Semiconductor has expanded its computing products portfolio with the introduction of three new power controllers, specifically designed to meet the efficiency requirements of notebook PCs. The NCP5371, NCP5218, and NCP5215 controllers address the notebook power subsystem needs for Vcore, DDR memory, and CPU chipsets respectively.
The NCP5371 is a 2-phase, dual-edge Vcore controller, specifically designed to support notebook mobile processor power delivery requirements. The current-mode variable-frequency architecture provides ultra fast dynamic response with virtually no overshoot for dynamic loads and dynamic VID changes. Automatic variable frequency operation during light load conditions provides high subsystem efficiency and fast transient response out of light load operation. The device includes gate drivers that are optimised for large Qg low-side MOSFETs, further improving overall subsystem efficiency.
The NCP5218 is a 2-in-1 power controller, specifically designed as a total solution for notebook DDR memory subsystems. This device combines the efficiency of a PWM controller for the VDDQ supply, with the simplicity of a linear regulator for the VTT supply. The high bandwidth VTT regulator requires only a 20 μF ceramic output capacitor. A power saving mode for light load conditions improves subsystem efficiency. The inclusion of VDDQ power good voltage monitoring, VDDQ over-current, over-voltage, and under-voltage protection, supply under-voltage monitoring, soft-start, and thermal shutdown make this device a total power solution for high current DDR memory subsystems.
The NCP5215 is a dual-channel buck controller, specifically designed for notebook chipsets. A programmable power-saving mode delivers high efficiency of greater than 90% over the entire load range. The 180° interleaved operation reduces input capacitance requirements, while the programmable Adaptive Voltage Position reduces output capacitance requirements.
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