What is on-resistance of a load switch?
The on-resistance of the load switch is a characteristic of the pass FET and will be used in calculating the power dissipated by the load switch. The pass FET can be either an N-channel or P-channel FET, which will determine the architecture of the load switch.
What is a pass Fet in a load switch?
The pass FET is the main component of the load switch, which determines the maximum input voltage and maximum load current the load switch can handle. The on-resistance of the load switch is a characteristic of the pass FET and will be used in calculating the power dissipated by the load switch.
What is a load switch?
In many designs, there are sub-systems that are only used during certain modes of operation. Load switches can be used to limit the amount of leakage current and power consumption by turning off power to these sub-systems. Figure 5 shows a comparison of the leakage current with and without a load switch.
Does a load switch save power?
Thus, the power dissipated by this rail now becomes: Thus, using a load switch will result in power savings by a factor of . As the number of rails increase, placing additional load switches to reduce the power consumption of standby rails that have excessive leakage current can result in significant power savings.
What are integrated load switches?
Integrated load switches are electronic switches that can be used to turn on and turn off power supply rails in systems, similar to a relay or a discrete FET. Load switches offer many other benefits to the system some including protection features that are often difficult to implement with discrete components.
What are common datasheet parameters & definitions for load switches?
Below is a list of common datasheet parameters and definitions for load switches. Input voltage range (V IN) – This is the range of input voltages that the load switch can support. Bias voltage range (VBIAS) – This is the range of bias voltages that the load switch can support.
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