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                                                                                       STN790A

        Medium current, high performance, low voltage PNP transistor

Features
   Very low collector to emitter saturation voltage
   DC current gain, hFE >100
                                                                      4
   3 A continuous collector current
   40 V breakdown voltage V(BR)CER
   SOT-223 plastic package for surface mounting
                                                                                           3
   circuits in tape and reel packing
                                                                                       2
                                                                                  1
                                                                             SOT-223
Applications
   Power management in portable equipment
   Voltage regulation in bias supply circuits
   Switching regulator in battery charger
                                                          Figure 1.   Internal schematic diagram
   applications
   Heavy load driver

Description
The device in manufactured in low voltage PNP
planar technology by using a "Base Island" layout.
The resulting transistor shows exceptional high
gain performance coupled with very low
saturation voltage.




Table 1.     Device summary
   Order code          Marking                        Package                      Packaging

   STN790A              N790A                         SOT-223                     Tape and reel




June 2008                                             Rev 4                                             1/9
                                                                                                  www.st.com   9
Electrical ratings                                                                   STN790A


1           Electrical ratings

            Table 2.        Absolute maximum rating
             Symbol                                 Parameter             Value         Unit

                 VCBO    Collector-base voltage (IE = 0)                   -40           V
                 VCER    Collector-emitter voltage (R BE = 47 )            -40           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 < 5 ms)                -6            A
                 Ptot    Total dissipation at Tamb = 25 

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