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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

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