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ON Semiconductor Is Now
AND9093/D. Using MOSFETs in Load Switch Applications APPLICATION NOTE. Introduction In today's market, power management is more important for the same die area. Thus, for high current applications the than ever. Portable systems strive to extend battery life while N-channel transistor is preferred. meeting an ever increasing demand for higher performance. When using an N-channel MOSFET in a load switch Load switches provide a simple and inexpensive method for circuit, the drain is connected directly to the input voltage the system to make the appropriate power management rail and the source is connected to the load.
portable low power devices, higher efficiency can be attained using a P-channel pass transistor, with the advantage of a simpler control circuit. To illustrate this, let’s assume that a 30 m N-channel transistor and a 50 m P-channel transistor have similar die size. The efficiency impact of the two devices will be
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