Microchip | MIC94042YFL-TR

In applications where multiple switching options are required, mechanical switches have long been replaced by electronic switching devices which can be automated and intelligently controlled.

A switch can also be referred to as a "gate". In the philosophy of logic, operational arguments are represented as logic gates. The use of electronic gates to function as a system of logical gates is the fundamental basis for the computer.

The MIC94042 is a family of high-side load switches designed to operate from 1.7V to 5.5V input voltage. The load switch pass element is an internal 28mO RDSON P-channel MOSFET which enables the device to support up to 3A of continuous current. Additionally, the load switch supports 1.5V logic level control and shutdown features in a tiny 1.2mm x 1.2mm 4 pin MLF® package.

The MIC94042 provides a slew rate controlled softstart turn-on of 100µs. The soft-start feature is provided to prevent an in-rush current event from pulling down the input supply voltage.

An active pull-down on the enable input keeps the MIC94042 in a default OFF state until the enable pin is pulled above 1.2V. Internal level shift circuitry allows low voltage logic signals to switch higher supply voltages. The enable voltage can be as high as 5.5V and is not limited by the input voltage.

The MIC94042 operating voltage range makes them ideal for Lithium ion and  NiMH/NiCad/Alkaline battery powered systems, as well as non-battery powered applications. The devices provide low quiescent current and low shutdown current to maximize battery life.

The MIC94042YFL is a 28mO RDSON 3A high side load switch with soft-start function that comes in a tiny 1.2mm x 1.2mm 4 pin MLF® package.