Vishay Siliconix MICRO FOOT MOSFETs Boast Smallest Size, Lowest On-Resistance

Vishay Siliconix announced two p-channel 30V members of its MICRO FOOT® TrenchFET® Gen III power MOSFET family. The new devices are claimed to set new benchmarks for size and on-resistance, with the Si8497DB announced as the industry's first 30V chipscale MOSFET in the compact 1mm by 5mm size, and the Si8487DB providing the lowest on-resistance for a 30V chipscale device in the 1.6mm by 1.6mm form factor.

According to Vishay Siliconix, the new devices are intended for load, battery, and charger switching in handheld devices, including smart phones, tablets, point-of-sale devices, and mobile computing. In laptop battery management circuits, the MOSFETs' low on-resistance is claimed to result in lower voltage drops across the load switch, reducing the occurrence of problem undervoltage lockouts. In tablet PC charger applications, smart phones, and POS devices, the low on-resistance is intended to allow the use of higher charge currents, enabling faster battery charging.

The 1.5mm by 1mm Si8497DB combines a 0.59mm maximum height with low on-resistance of 53mΩ at 4.5V, 71mΩ at 2.5V, and 120mΩ at 2.0V. The Si8487DB offer on-resistance of 31mΩ at 10V, 35mΩ at 4.5V, and 45mΩ at 2.5V, and a 0.6mm maximum height.

The devices are halogen-free in accordance with the IEC 61249-2-21 definition and compliant to RoHS Directive 2002/95/EC. The Si8487DB is pin compatible with Vishay's 30V Si8409DB. Samples and production quantities of the new MOSFETs are available now, with lead times of 12 weeks for larger orders.