STT818B
High gain low voltage PNP power transistor
Features
Ver y low collector to emitter saturation voltage DC current gain > 100 (hFE) 3 A continuous collector current (IC)
Applications
Power management in portable equipments Switching regulator in battery charger applications
SOT23-6L
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. Figure 1. Internal schematic diagram
Table 1.
Device summary
Marking 818B Package SOT23-6L Packaging Tape & reel
Order code STT818B
August 2007
Rev 5
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Contents
STT818B
Contents
1 2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 4
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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Electrical ratings
1
Electrical ratings
Table 2.
Symbol VCBO VCEO VEBO IC ICM IB IBM 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) Base current Base peak current (tP < 5ms) Total dissipation at Tamb = 25C Storage temperature Max. operating junction temperature Value -30 -30 -5 -3 -6 -0.2 -0.5 1.2 -65 to 150 150 Unit V V V A A A A W C C
Table 3.
Symbol Rthj-amb
(1)
Thermal data
Parameter Thermal resistance junction-ambient max Value 104.2 Unit C/W
1. Package mounted on FR4 pcb 25mm x 25mm.
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Electrical characteristics
STT818B
2
Electrical characteristics
(Tcase = 25C unless otherwise specified) Table 4.
Symbol ICBO IEBO
Electrical characteristics
Parameter Collector cut-off current (IE =0) Collector-cut-off current (IC = 0) Test conditions VCB = -30 V VCB = -30 V VEB = -5 V TC = 125C Min. Typ. Max. -0.1 -20 -0.1 Unit A A A
Collector-emitter V(BR)CEO(1) breakdown voltage (IB = 0)
(1)
IC = -10 mA IC = -0.5 A IC = -1.2 A IC = -2 A _ IB = -5 mA IB = -12 mA _ IB = -20 mA _ IB = -5 mA
-30
V
VCE(sat)
Collector-emitter saturation voltage
-0.075 -0.21 -0.74
-0.15 -0.3 -0.5 -1.1 -1.1 -1.2
V V V V V V
VBE(sat)
(1)
Base-emitter saturation voltage
IC = -0.5 A IC = -1.2A IC = -2A
_ IB = -12 mA _ IB = -20 mA VCE = -1 V VCE = -3 V VCE = -2 V 100 100 -0.71
hFE(1) VBE(ON)(1)
DC current gain Base-emitter voltage
IC = -0.5 A IC = -2.5 A IC = -0.5 A
-1.1
V
1. Pulse duration = 300 s, duty cycle 1.5 %.
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Electrical characteristics
2.1
Electrical characteristics (curves)
Figure 2. Safe operating area Figure 3. Derating curve
Figure 4.
DC Current Gain
Figure 5.
DC Current Gain
Figure 6.
Collector-emitter saturation voltage
Figure 7.
Base-emitter saturation voltage
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Electrical characteristics Figure 8. Switching times resistive load Figure 9.
STT818B Switching times resistive load
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STT818B
Package mechanical data
3
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
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Package mechanical data
STT818B
SOT23-6L MECHANICAL DATA
mm MIN. A A1 A2 b C D E E1 L e e1 0.90 0.00 0.90 0.25 0.09 2.80 2.60 1.50 0.35 0.95 1.90 TYP. MAX. 1.45 0.15 1.30 0.50 0.20 3.10 3.00 1.75 0.55 MIN. 0.035 0.000 0.035 0.010 0.004 0.110 0.102 0.059 0.014 0.037 0.075 mils TYP. MAX. 0.057 0.006 0.051 0.020 0.008 0.122 0.118 0.069 0.022
DIM.
A A2 A1 b e1 e c L E
D
E1
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Revision history
4
Revision history
Table 5.
Date 12-Jul-2002 08-Aug-2007
Document revision history
Revision 4 5 Changes No content change; the document has been reformatted Updated Figure 3
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