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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
SOT-223
2
1
2
3
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
Marking N878 Package SOT-223 Packaging Tape & reel
Order code STN878
August 2007
Rev 1
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Contents
STN878
Contents
1 2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 2.2 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 4
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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STN878
Electrical ratings
1
Electrical ratings
Table 2.
Symbol VCBO VCEO VEBO IC ICM Ptot Tstg TJ
Absolute maximum rating
Parameter Collector-base voltage (IE = 0) Collector-emitter voltage (IB = 0) Emitter-base voltage (IC = 0) Collector current Collector peak current (tP < 5ms) Total dissipation at Tamb = 25C Storage temperature Max. operating junction temperature Value 45 30 6 5 10 1.6 -65 to 150 150 Unit V V V A A W C C
Table 3.
Symbol Rthj-amb
1.
Thermal data
Parameter Thermal resistance junction-amb(1) __max Value 78 Unit C/W
Device mounted on PCB area of 1 cm2.
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Electrical characteristics
STN878
2
Electrical characteristics
(Tcase = 25C unless otherwise specified) Table 4.
Symbol ICBO IEBO
Electrical characteristics
Parameter Collector cut-off current (IE =0) Emitter cut-off current (IC =0) Test conditions VCB = 30 V VCB = 30 V; VEB = 6 V TC = 100 C Min. Typ. Max. 10 100 10 Unit A A A
Collector-emitter V(BR)CEO (1) breakdown voltage (IB =0) V(BR)CBO Collector-base breakdown voltage (IE =0) Emitter-base breakdown voltage (IC =0)
IC = 10 mA
30
V
IC = 100 A
45
V
V(BR)EBO
IE = 100 A IC = 0.5 A IC = 2 A IB = 5 mA IB = 50 mA IB = 0.25 A IB = 0.25 A IB = 0.4 A IB = 0.5 A IB = 50 mA IB = 0.25 A VCE = 1 V VCE = 1 V VCE = 1 V VCE = 1 V
6 0.15 0.35 0.7 0.7 1 1.2 1.1 1.2 120 100 70 200 200 100 100 VCE = 1 V VCE = 1 V 55 35 300
V V V V V V V V V
VCE(sat) (1)
Collector-emitter saturation voltage
IC = 5 A IC = 6 A IC = 8 A IC = 10 A
VBE(sat) (1)
Base-emitter saturation voltage
IC = 2 A IC = 6 A IC = 10 mA IC = 500 mA IC = 5 A
hFE (1)
DC current gain
IC = 5 A Tc = 100 C IC = 8 A IC = 10 A
td tr ts tf
Resistive load Delay time Rise time Storage time Fall time
IC = 3 A see Figure 8
VCC = 20 V
180 160 250 80
220 210 300 100
ns ns ns ns
IB1 = -IB2 = 60 mA
1. Pulsed duration = 300 ms, duty cycle 1.5 %
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Electrical characteristics
2.1
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
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Electrical characteristics
STN878
2.2
Test circuits
Figure 8. Resistive load switching test circuit
1) Fast electronic switch 2) Non-inductive resistor
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Package mechanical data
3
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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
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Package mechanical data
STN878
SOT-223 MECHANICAL DATA
mm MIN. A B B1 c D e e1 E H V A1 0.02 3.30 6.70 0.60 2.90 0.24 6.30 0.70 3.00 0.26 6.50 2.30 4.60 3.50 7.00 3.70 7.30 10o 0.130 0.264 TYP. MAX. 1.80 0.80 3.10 0.32 6.70 0.024 0.114 0.009 0.248 0.027 0.118 0.010 0.256 0.090 0.181 0.138 0.276 0.146 0.287 10o MIN. inch TYP. MAX. 0.071 0.031 0.122 0.013 0.264
DIM.
P008B
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Revision history
4
Revision history
Table 5.
Date 21-Aug-2007
Document revision history
Revision 1 Initial release. Changes
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