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2stf2550_2stn2550


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                                                                                                                       2STF2550
                                                                                                                       2STN2550

                              Low voltage high performance PNP power transistors
                                                                                                                            Preliminary Data


Features
    Very low collector-emitter saturation voltage
    High current gain characteristic
    Fast switching speed                                                                                           4
                                                                                  4
    Surface mounting devices in medium power                                                                 3
    SOT-89 and SOT-223 packages                                                                          2                             3
                                                                                                                                  2
                                                                                                     1                        1
Applications                                                                             SOT-89                         SOT-223

    Emergency lighting
    LED
    Motherboard and hard disk drive
    Mobile equipment
                                                                             Figure 1.         Internal schematic diagram
    Battery charger
    Voltage regulation

Description
The 2STF2550 and 2STN2550 are PNP
transistors 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 codes                             Marking                                Package                          Packaging

          2STF2550                                 2550                                 SOT-89
                                                                                                                       Tape and reel
          2STN2550                                N2550                                SOT-223




November 2008                                                         Rev 1                                                                1/8
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to              www.st.com     8
change without notice.
Electrical ratings                                                            2STF2550 - 2STN2550


1           Electrical ratings

            Table 2.      Absolute maximum rating
                                                                               Value

             Symbol                          Parameter               2STF2550         2STN2550   Unit

                                                                      SOT-89          SOT-223

               VCES    Collector-emitter voltage (VCE = 0)                      -50               V
               VCEO    Collector-emitter voltage (IB = 0)                       -50               V
               VEBO    Emitter-base voltage (IC = 0)                             -5               V
                IC     Collector current                                         -5               A
               ICM     Collector peak current (tP < 5 ms)                       -10               A
                IB     Base current                                              -1               A
               PTOT    Total dissipation at Tamb = 25 



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