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STT818B High gain low voltage PNP power transistor Features Very low collector to emitter saturation voltage DC current gain > 100 (hFE) 3 A continuous collector current (IC) Applications Power management in portable equipments SOT23-6L Switching regulator in battery charger applications Description The device is manufactured in low voltage PNP Planar Technology with "Base Island" layout. The Figure 1. Internal schematic diagram resulting Transistor shows exceptional high gain performance coupled with very low saturation voltage. Table 1. Device summary Order code Marking Package Packaging STT818B 818B SOT23-6L Tape & reel August 2007 Rev 5 1/10 www.st.com 10 Contents STT818B Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2/10 STT818B Electrical ratings 1 Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Value Unit VCBO Collector-base voltage (IE = 0) -30 V VCEO Collector-emitter voltage (IB = 0) -30 V VEBO Emitter-base voltage (IC = 0) -5 V IC Collector current -3 A ICM Collector peak current (tP < 5ms) -6 A IB Base current -0.2 A IBM Base peak current (tP < 5ms) -0.5 A Ptot Total dissipation at Tamb = 25