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High-side load switches operate from 1.5-5.5V

Posted: 29 Apr 2013 ?? ?Print Version ?Bookmark and Share

Keywords:switches? WCSP6? smartphone?

Vishay Intertechnology Inc. has announced a pair of slew-rate-controlled p-channel high-side load switches intended for 1.5-5.5V operation. According to the company, the SiP32458 and SiP32459 offer an integrated gate pump that provides low and flat on-resistance down to 20m次, while maintaining a low quiescent current.

Available in a compact 6-bump wafer-level CSP package (WCSP6), the devices feature a controlled slow turn-on slew rate of 3ms typical at 4.5V to limit the in-rush current for designs with capacitive or noise-sensitive loads, added the company.

For higher efficiency, the load switches provide low switch on-resistance of 30m次 typical at 1.5V, 26m次 typical at 1.8V, and 20m次 typical at 3.3V and 5V. Both switches support 3A of continuous current, while a low quiescent current of 4.2?A typical allows for longer on-times in battery-powered equipment. When disabled, the SiP32458 provides a reverse blocking circuit to prevent high current from flowing into the power source. The SiP32459 integrates an output discharge switch that enables a fast discharge of the load when the load switch is disabled, the firm detailed.

The WCSP6 package of the SiP32458 and SiP32459 offers a small 1 x 1.5mm footprint with a 0.5mm pitch, and features a top-side lamination for enhanced mechanical ruggedness. To save further space, the load switches feature a low input logic control threshold that can interface directly with low-voltage I/O pins, eliminating the need for extra level-shifting circuitry or higher voltage gate drivers. Both devices provide integrated 2.8M次 pull-down resistors at their control logic EN pins.

The SiP32458 and SiP32459 can be used for load switching in portable electronics such as smartphones, GPS devices, digital cameras, media players, notebooks and tablet devices; game consoles; medical and healthcare devices; and industrial instrumentation. The devices are RoHS-compliant and halogen-free.

Samples and production quantities of the SiP32458 and SiP32459 are available with lead times of 12 weeks.





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