Preliminary Data
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
November 2008 Rev 2 1/8
8
2STF1550
2STN1550
Low voltage high performance NPN power transistors
Features
■ Very low collector-emitter saturation voltage
■ High current gain characteristic
■ Fast switching speed
■ Surface mounting devices in medium power
SOT-89 and SOT-223 packages
Applications
■ Emergency lighting
■ LED
■ Motherboard and hard disk drive
■ Mobile equipment
■ Battery charger
■ Voltage regulation
Description
The 2STF1550 and 2STN1550 are NPN
transistors manufactured using new “PB-HCD”
(Power bipolar high current density) technology.
The resulting transistor shows exceptional high
gain performances coupled with very low
saturation voltage.
Figure 1. Internal schematic diagram
SOT-89
1
2
4
3
SOT-223
4
3
2
1
Table 1. Device summary
Order codes Marking Package Packaging
2STF1550 1550 SOT-89
Tape and reel
2STN1550 N1550 SOT-223
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