January 2008 Rev 3 1/9
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Table 1. Device summary
Order code Marking Package Packaging
2STN2540 N2540 SOT-223 Tape and reel
2STN2540
Low voltage fast-switching PNP power bipolar transistor
Features
■ Very low collector-emitter saturation voltage
■ High current gain characteristic
■ Fast switching speed
■ Surface mounting device in medium power
SOT-223 package
Applications
■ Emergency lighting
■ LED
■ CCFL drivers (back lighting)
■ Voltage regulation
■ Relay driver
Description
The device is a PNP transistor manufactured
using new “PB-HCD” (Power Bipolar High Current
Density) technology. The resulting transistor
shows exceptional high gain performances
coupled with very low saturation voltage.
Figure 1. Internal schematic diagram
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SOT-223
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