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STX790A
Medium current, high performance, low voltage PNP transistor
Features
Very low collector to emitter saturation voltage
DC current gain, hFE > 100
3 A continuous collector current
40 V breakdown voltage V(BR)CER
Applications
Power management in portable equipment TO-92 TO-92AP
Voltage regulation in bias supply circuits
Switching regulator in battery charger
applications
Heavy load driver
Figure 1. Internal schematic diagram
Description
The devices are manufactured in low voltage PNP
planar technology by using a "Base Island" layout.
The resulting transistor shows exceptional high
gain performance coupled with very low
saturation voltage. The STX790AG-AP is supplied
using halogen-free molding compound.
Table 1. Device summary
Order codes Marking Packages Packaging
STX790A X790A TO-92 Bulk
STX790A-AP X790A TO-92 AP Ammopack
STX790AG-AP X790AG TO-92 AP Ammopack
April 2009 Doc ID 9406 Rev 4 1/10
www.st.com 10
Electrical ratings STX790A
1 Electrical ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VCBO Collector-base voltage (IE = 0) -40 V
VCER Collector-emitter voltage (RBE = 47 ) -40 V
VCEO Collector-emitter voltage (IB = 0) -30 V
VEBO Emitter-base voltage (IC = 0) -5 V
IC Collector current -3 A
ICM Collector peak current (tP < 5 ms) -6 A
Ptot Total dissipation at Tamb = 25