Fairchild Semiconductor’s IntelliMAX™ Dual Switches Offer the Industry’s Tightest Current Limit Tolerance
July 09 2009 - 11:30AM
Business Wire
Fairchild Semiconductor (NYSE: FCS) brings designers of set-top
boxes, notebooks, netbooks and ultra-mobile portable devices
(UMPCs) a new family of advanced load switches, the FPF23xx series.
Packaged in a dual configuration, these devices offer the
industry�s tightest tolerance (15 percent) current limit
protection, simplify design and accelerate the time-to-market
window. This tighter tolerance allows designers to reduce the
maximum operating threshold (i.e., the upper current limit), which
eases component sizing and application evaluation, while not
interfering with the normal operating performance of the
design.
This current limit protection design challenge can be seen in
multiple-USB port power applications, where designers must protect
their systems from excessive loads on the USB interface. USB 2.0,
the current standard, specifies a maximum current of 500mA. Using
Fairchild�s IntelliMAX, advanced load switches, designers meet this
specification by setting the device�s minimum current limit to
500mA, which at 15 percent tolerance, equates to a maximum current
limit of approximately 700mA. The equivalent performance using a 25
percent tolerance-device is 500mA minimum and 900mA maximum, or
almost twice the set point. This performance, coupled with its low
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