Dual 4.5-A load switch in 1 x 3 mm outline

April 03, 2014 // By Graham Prophet
Silego’s CuFET technology enables high performance dual 16 mΩ GreenFET3 load switches in a 1.0 x 3.0 mm package, and 28 mΩ in 1 x 1mm.

SLG59M1527V is a 16 mΩ dual channel GreenFET3 load switch product based on Silego’s proprietary sub-micron copper power FET technology. This load switch can handle 4.5A max current per channel for 9.0A total. The device uses Silego’s CuFET technology to achieve low RDSON, smallest form factor and improved reliability.

The SLG59M1527 is a full-featured dual channel load switch packaged in a 14-pin STDFN 1.0 x 3.0 mm package. Each channel can be configured and enabled independently. This device features a linear voltage ramp under dynamic loading conditions. The ramp rate on each channel can be independently adjusted by the designer using external capacitors. The device can switch power rails in the range from 1.0V to 5.5V, up to 4.5A continuous current for each channel. The load switch also includes discharge circuit, over current limit protection, short circuit protection and thermal shutdown protection.

“The dual channel 4.5A load switch allows systems to implement power switch-over between primary and secondary power supply rails in a single device, the smallest [available] load switch, one half the size of Silego’s previous record-setting generation.” said John McDonald, Silego’s VP of Marketing.

Features inlcude; V DD: 2.5 V to 5.5 V; I DD (Standby): < 1 µA; Integrated discharge; Multiple protection modes. Applications are in computing power rail switching; primary and secondary power supply switching; and power sequencing.

Also introduced by the same company is a 28 mΩ, ultra-low quiescent current P-Channel load switch; SLG59M1557 is also based on Silego’s CuFET technology. The device can achieve 0.1 µA typical and 1 µA maximum quiescent current in both ON and OFF states. This device has an integrated level shift function for the ON pin, which allows the system MCU to directly turn on or off the load switch without any discrete logic or level shifting components.

“The low quiescent current performance and integrated level shift are ideal features for applications such as wearable electronics