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2STN2540
Low voltage fast-switching PNP power bipolar transistor
Features
Very low collector-emitter saturation voltage
High current gain characteristic
4
Fast switching speed
Surface mounting device in medium power
SOT-223 package 3
2
1
Applications
Emergency lighting SOT-223
LED
CCFL drivers (back lighting)
Voltage regulation
Figure 1. Internal schematic diagram
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.
Table 1. Device summary
Order code Marking Package Packaging
2STN2540 N2540 SOT-223 Tape and reel
January 2008 Rev 3 1/9
www.st.com 9
Electrical ratings 2STN2540
1 Electrical ratings
Table 2. Absolute maximum rating
Symbol Parameter Value Unit
VCBO Collector-base voltage (IE = 0) -40 V
VCEO Collector-emitter voltage (IB = 0) -40 V
VEBO Emitter-base voltage (IC = 0) -6 V
IC Collector current -5 A
ICM Collector peak current (tP < 5ms) -10 A
IBM Base peak current (tP < 5ms) -2 A
Ptot Total dissipation at Tamb = 25