Phoenix, Ariz. ON Semiconductor has released three 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.
Featuring a variety of power-saving features, the three power controllers improve the efficiency of power management subsystems in notebook computers by up to 5 percent, thereby extending battery life, said ON Semiconductor. The memory and chipset controllers operate with fewer capacitors than existing solutions, enabling physically smaller power management subsystems, and therefore, allowing for more circuit board real estate for other functions.
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 optimized for large Qg low-side MOSFETs, which further improve 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, said ON Semiconductor. The high bandwidth VTT regulator requires only a 20 microfarad ceramic output capacitor, versus the 60 microfarad of capacitance required for existing market solutions, said the company. A power saving mode for light load conditions improves subsystem efficiency. The inclusion of VDDQ power good voltage monitoring, VDDQ overcurrent, overvoltage, and undervoltage protection, supply undervoltage monitoring, soft-start, and thermal shutdown makes 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 percent over the entire load range. The 180-degree interleaved operation reduces input
capacitance requirements, while the programmable Adaptive Voltage Position reduces output capacitance requirements, combining to reduce board space for capacitors by 25 percent versus existing solutions, said the company.
Pricing: Available in a Pb-free QFN-48 package, the NCP5371 is priced at
$3.33 per unit in quantities of 2,500. The NCP5218 is available in a Pb-free DFN-22 package, and is priced at $1.13 per unit in quantities of 2,500. The NCP5215 is available in a Pb-free QFN-40 package, and is priced at $1.13 per unit in quantities of 2,500.
Product information: NCP5371>,
NCP5218, and NCP5215
ON Semiconductor, 1-602-244-6600, www.onsemi.com