STN878 Medium current, high performance, low voltage NPN transistor Features ■ Very low Collector to Emitter saturation voltage ■ D.C. Current gain, hFE >100 ■ 5A continuous collector current ■ SOT-223 plastic package for surface mounting circuits ■ Available in tape & reel packing 2 2 1 3 SOT-223 Applications ■ Power management in portable equipment ■ Voltage regulation in bias supply circuits ■ Switching regulator in battery charger applications ■ Heavy load driver Figure 1. Internal schematic diagram Description The device is manufactured in low voltage PNP planar technology with “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 STN878 N878 SOT-223 Tape & reel August 2007 Rev 1 1/10 www.st.com 10 Contents STN878 Contents 1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2/10 STN878 1 Electrical ratings Electrical ratings Table 2. Absolute maximum rating Symbol Parameter Unit VCBO Collector-base voltage (IE = 0) 45 V VCEO Collector-emitter voltage (IB = 0) 30 V VEBO Emitter-base voltage (IC = 0) 6 V Collector current 5 A ICM Collector peak current (tP < 5ms) 10 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. Max. operating junction temperature Thermal data Symbol Parameter Rthj-amb Thermal resistance junction-amb(1) 1. Value __max Device mounted on PCB area of 1 cm2. 3/10 Electrical characteristics 2 STN878 Electrical characteristics (Tcase = 25°C unless otherwise specified) Table 4. Symbol Electrical characteristics Parameter ICBO Collector cut-off current (IE =0) IEBO Emitter cut-off current (IC =0) Test conditions Typ. VCB = 30 V VCB = 30 V; TC = 100 °C VEB = 6 V Max. Unit 10 100 µA µA 10 µA Collector-emitter V(BR)CEO (1) breakdown voltage (IB =0) IC = 10 mA 30 V V(BR)CBO Collector-base breakdown voltage (IE =0) IC = 100 µA 45 V V(BR)EBO Emitter-base breakdown voltage (IC =0) IE = 100 µA 6 V IB = 5 mA 0.15 V IC = 2 A IB = 50 mA 0.35 V IC = 5 A IB = 0.25 A 0.7 V IC = 6 A IB = 0.25 A 0.7 V IC = 8 A IB = 0.4 A 1 V IC = 10 A IB = 0.5 A 1.2 V IC = 2 A IB = 50 mA IC = 6 A IB = 0.25 A IC = 0.5 A VCE(sat) (1) VBE(sat) (1) hFE (1) Collector-emitter saturation voltage Base-emitter saturation voltage DC current gain td tr ts tf Resistive load Delay time Rise time Storage time Fall time 1.1 1.2 IC = 10 mA VCE = 1 V 120 200 IC = 500 mA VCE = 1 V 100 200 IC = 5 A VCE = 1 V 70 100 IC = 5 A VCE = 1 V Tc = 100 °C V V 300 100 IC = 8 A VCE = 1 V 55 IC = 10 A VCE = 1 V 35 VCC = 20 V 180 220 ns IB1 = -IB2 = 60 mA 160 210 ns see Figure 8 250 300 ns 80 100 ns IC = 3 A 1. Pulsed duration = 300 ms, duty cycle ≤1.5 % 4/10 Min. STN878 2.1 Electrical characteristics Electrical characteristics (curves) Figure 2. DC current gain Figure 3. DC current gain Figure 4. Collector-emitter saturation voltage Figure 5. Base-emitter saturation voltage Figure 6. Switching time resistive load Figure 7. Switching time resistive load 5/10 Electrical characteristics 2.2 Test circuits Figure 8. Resistive load switching test circuit 1) Fast electronic switch 2) Non-inductive resistor 6/10 STN878 STN878 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 7/10 Package mechanical data STN878 SOT-223 MECHANICAL DATA mm DIM. MIN. TYP. A inch MAX. MIN. TYP. 1.80 MAX. 0.071 B 0.60 0.70 0.80 0.024 0.027 0.031 B1 2.90 3.00 3.10 0.114 0.118 0.122 c 0.24 0.26 0.32 0.009 0.010 0.013 D 6.30 6.50 6.70 0.248 0.256 0.264 e 2.30 0.090 e1 4.60 0.181 E 3.30 3.50 3.70 0.130 0.138 0.146 H 6.70 7.00 7.30 0.264 0.276 0.287 10o V A1 10o 0.02 P008B 8/10 STN878 4 Revision history Revision history Table 5. Document revision history Date Revision 21-Aug-2007 1 Changes Initial release. 9/10 STN878 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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