Malvern, Pa. − Vishay Intertechnology, Inc. offers two slew-rate-controlled p-channel high-side load switches designed for 1.5 V to 5.5 V operation, housed in a small 6-bump wafer-level CSP package (WCSP6), measuring 1- x 1.5-mm with a 0.5-mm pitch. Applications include load switching in portable electronics, medical and healthcare devices, and industrial instrumentation.
The SiP32458 and SiP32459 devices offer an integrated gate pump that provides low and flat on-resistance down to 20 mΩ, while maintaining a low quiescent current. They also feature a controlled slow turn-on slew rate of 3 ms typical at 4.5 V to limit the in-rush current for designs with capacitive or noise-sensitive loads.
For higher efficiency, the load switches provide low switch on-resistance of 30 mΩ typical at 1.5 V, 26 mΩ typical at 1.8 V, and 20 mΩ typical at 3.3 V and 5 V. Both switches support 3 A of continuous current, while a low quiescent current of 4.2 µA typical allows for longer on-times in battery-powered equipment, said Vishay. 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 load switches save additional space with 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 2.8 MΩ pull-down resistors at their control logic EN pins.
The devices are RoHS-compliant and halogen-free.
Availability: Samples and production quantities of the SiP32458 and SiP32459 are available now, with lead times of 12 weeks.
Pricing: $0.31 each in quantities of 1,000 for U.S. delivery.