2STN2540 Low voltage fast-switching PNP power bipolar transistor Features ■ Very low collector-emitter saturation voltage ■ High current gain characteristic ■ Fast switching speed ■ Surface mounting device in medium power SOT-223 package 4 1 Applications 2 3 SOT-223 ■ Emergency lighting ■ LED ■ CCFL drivers (back lighting) ■ Voltage regulation ■ Relay driver Figure 1. Internal schematic diagram Description The device is a PNP transistor 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 code Marking Package Packaging 2STN2540 N2540 SOT-223 Tape and reel January 2008 Rev 3 1/9 www.st.com 9 Electrical ratings 1 2STN2540 Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Unit VCBO Collector-base voltage (IE = 0) -40 V VCEO Collector-emitter voltage (IB = 0) -40 V VEBO Emitter-base voltage (IC = 0) -6 V Collector current -5 A ICM Collector peak current (tP < 5ms) -10 A IBM Base peak current (tP < 5ms) -2 A Ptot Total dissipation at Tamb = 25 °C 1.6 W Tstg Storage temperature -65 to 150 °C 150 °C Value Unit 78 °C/W IC TJ Table 3. Symbol Max. operating junction temperature Thermal data Parameter Rthj-amb(1) Thermal resistance junction-amb 1. Device mounted on PCB area of 1cm2 2/9 Value __max 2STN2540 2 Electrical characteristics Electrical characteristics (Tcase = 25 °C unless otherwise specified) Table 4. Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit ICBO Collector cut-off current (IE =0) VCB = -30 V -0.1 µA IEBO Emitter cut-off current (IC =0) VEB = -5 V -0.1 µA VCE(sat) (1) Collector-emitter saturation voltage IC = -0.5 A IB = -5 mA -80 -120 mV IC = -1 A IB = -10 mA -120 -180 mV IC = -2 A IB = -200 mA -140 -200 mV IC = -5 A IB = -500 mA -350 -450 mV VBE(sat) (1) Base-emitter saturation voltage IC = -5 A IB = -500 mA -1.3 V VBE(on) (1) Base-emitter on voltage VCE = -2 V IC = -2 A -1.25 V IC = -0.5 A V CE = -2 V 250 IC = -1 A V CE = -2 V 200 IC = -2 A V CE = -2 V 150 IC = -5 A V CE = -2 V 50 hFE (1) CCBO ton ts tf DC current gain Collector-base capacitance Resistive load Turn-on time Storage time Fall time IE = 0 V CB = -10 V 80 pF -IB1 = IB2 = -0.1 A 75 ns Tp = 30 µs 426 ns 62 ns f = 1 MHz IC = -1 A _ V CC = -10 V 1. Pulsed duration = 300 µs, duty cycle ≤1.5% 3/9 Electrical characteristics 2.1 4/9 2STN2540 Electrical characteristics (curves) Figure 2. Output characteristics Figure 3. DC current gain Figure 4. Collector-emitter saturation voltage Figure 5. Base-emitter saturation voltage Figure 6. Base-emitter on voltage Figure 7. Resistive load switching times 2STN2540 Electrical characteristics Figure 8. 2.2 Resistive load switching times Figure 9. Capacitance Test circuit Figure 10. Resistive load switching test circuit 1) Fast electronic switch 2) Non-inductive resistor 5/9 Package mechanical data 3 2STN2540 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com 6/9 2STN2540 Package mechanical data SOT-223 mechanical data mm. DIM. min. typ A max. 1.80 A1 0.02 B 0.60 0.1 0.70 0.85 B1 2.90 3.00 3.15 c 0.24 0.26 0.35 D 6.30 6.50 6.70 e 2.30 e1 4.60 E 3.30 3.50 3.70 H 6.70 7.00 7.30 V 10 o 0046067_L 7/9 Revision history 4 2STN2540 Revision history Table 5. 8/9 Document revision history Date Revision Changes 23-Oct-2003 1 Initial release 03-Nov-2006 2 Added new graphics: fig.2, fig. 7, fig.8, fig.9. 14-Jan-2008 3 Document status promoted from preliminary data to datasheet. 2STN2540 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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