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2STF2220
High gain Low Voltage PNP power transistor
Features
Very low Collector to Emitter saturation voltage
D.C. Current gain, hFE >100
1.5 A continuous collector current
Applications
Power management in portable equipment
Switching regulator in battery charger SOT-89
applications
Description
The device in a PNP transistor manufactured Figure 1. Internal schematic diagram
using new "PB-HDC" (Power Bipolar High Density
Current) technology. The resulting transistor
shows exceptional high gain performances
coupled with very low saturation voltage.
Table 1. Device summary
Order code Marking Package Packaging
2STF2220 2220 SOT-89 Tape & reel
September 2007 Rev 3 1/11
www.st.com 11
2STF2220
Contents
1 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Electrical characteristics (curves) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11
2STF2220 Electrical ratings
1 Electrical ratings
Table 2. Absolute maximum rating
Symbol Parameter Value Unit
VCBO Collector-base voltage (IE = 0) -20 V
VCEO Collector-emitter voltage (IB = 0) -20 V
VEBO Emitter-base voltage (IC = 0) -5 V
IC Collector current -1.5 A
ICM Collector peak current (tP < 5ms) -3 A
IB Base current -0.1 A
IBM Base peak current (tP < 5ms) -0.2 A
Ptot Total dissipation at T amb = 25