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2STF2220 High gain Low Voltage PNP power transistor Features Very low Collector to Emitter saturation voltage D.C. Current gain, hFE >100 1.5 A continuous collector current Applications Power management in portable equipment Switching regulator in battery charger SOT-89 applications Description The device in a PNP transistor manufactured Figure 1. Internal schematic diagram using new "PB-HDC" (Power Bipolar High Density Current) technology. The resulting transistor shows exceptional high gain performances coupled with very low saturation voltage. Table 1. Device summary Order code Marking Package Packaging 2STF2220 2220 SOT-89 Tape & reel September 2007 Rev 3 1/11 www.st.com 11 2STF2220 Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2/11 2STF2220 Electrical ratings 1 Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Value Unit VCBO Collector-base voltage (IE = 0) -20 V VCEO Collector-emitter voltage (IB = 0) -20 V VEBO Emitter-base voltage (IC = 0) -5 V IC Collector current -1.5 A ICM Collector peak current (tP < 5ms) -3 A IB Base current -0.1 A IBM Base peak current (tP < 5ms) -0.2 A Ptot Total dissipation at T amb = 25