STN951 Low voltage fast-switching PNP power 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 ■ Voltage regulators ■ Relay drivers ■ High efficiency low voltage switching applications Figure 1. Internal schematic diagram Description The device is manufactured in PNP planar technology by using a “Base Island” layout. The resulting transistor shows exceptional high gain performances coupled with very low saturation voltage. Table 1. Device summary Order codes Marking Package Packaging STN951 N951 SOT-223 Tape and reel October 2008 Rev 3 1/8 www.st.com 8 STN951 Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2/8 STN951 1 Electrical ratings Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Value Unit VCBO Collector-base voltage (IE = 0) -60 V VCEO Collector-emitter voltage (IB = 0) -60 V VEBO Emitter-base voltage (IC = 0) -6 V Collector current -5 A Collector peak current (tP < 5 ms) -10 A Base current -1 A IBM Base peak current (tP < 5 ms) -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 ICM IB Tj Table 3. Symbol Max. operating junction temperature Thermal data Parameter Rthj-amb(1) Thermal resistance junction-amb __max 1. Device mounted on PCB area of 1cm 2 3/8 Electrical characteristics 2 STN951 Electrical characteristics (Tcase = 25 °C unless otherwise specified) Table 4. Electrical characteristics Symbol Parameter Min. Typ. Max. Unit ICBO Collector cut-off current (IE =0) VCB = -60 V -0.1 µA IEBO Emitter cut-off current (IC =0) VEB = -5 V -0.1 µA Collector-base V(BR)CBO (1) Breakdown voltage (IE =0) IC = -100 µA -60 V Collector-emitter V(BR)CEO (1) Breakdown voltage (IB =0) IC = -10 mA -60 V V(BR)EBO (1) Emitter-base Breakdown voltage (IC =0) IE = -100 µA -6 V VCE(sat) (1) Collector-emitter saturation voltage IC = -100 mA IB = -5 mA IB = -50 mA IC = -1 A -10 -50 mV -70 -120 mV IC = -2 A IB = -50 mA -140 -250 mV IC = -5 A IB = -200 mA -350 -500 mV VBE(sat) (1) Base-emitter saturation voltage IC = -4 A IB = -200 mA -1 -1.15 V VBE(on) (1) Base-emitter on voltage IC = -4 A V CE = -1 V -0.89 -1 V IC = -10 mA V CE = -1 V 150 300 IC = -2 A V CE = -1 V 150 270 IC = -5 A V CE = -1 V 65 90 IC = -10 A V CE = -1 V 10 25 hFE (1) DC current gain 350 fT Transition frequency VCE = -10 V IC = -100 mA 130 MHz CCBO Collector-base capacitance (IE =0) VCB = -10 V f = 1 MHz 60 pF IC = -1 A V CC = -30 V 80 ns 600 ns 70 ns ton ts tf Resistive load Turn-on time Storage time Fall time 1. Pulse duration = 300 µs, duty cycle ≤ 2 % 4/8 Test conditions IB1 = - IB2 = -0.1 A STN951 3 Package mechanical data 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 5/8 Package mechanical data STN951 SOT-223 mechanical data mm. DIM. min. typ A max. 1.80 A1 0.02 0.1 B 0.60 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 6/8 STN951 4 Revision history Revision history . Table 5. Document revision history Date Revision Changes 03-Oct-2006 1 Initial release. 30-Nov-2006 2 The emitter base voltage value has been modified 13-Oct-2008 3 Document status promoted from preliminary data to datasheet 7/8 STN951 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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