POWER AND LINEAR IC SOLUTIONS

Low Profile Transistors Set New Standards for Portable Applications

The ZXTP25020CFF and ZXTP19020DFF are low voltage PNP additions to Zetex Semiconductors’ range of low saturation, high current SOT23FF transistors. With the footprint of a standard SOT23 package but a reduced off-board height of less than 1mm, the devices will suit a range of slimline portable product designs.



Helping to reduce component counts and increase power density, the devices are designed to serve as cost effective switchers in a variety of portable applications, including linear charging and high-side load-switching circuits.

By guaranteeing a reverse blocking capability of 7V, the ZXTP25020CFF removes the need for a series connected Schottky diode in linear chargers. This saves up to 50% PCB area compared with P-channel MOSFETs of comparable footprint, which due to their inherent drain-source body diode, require a series Schottky diode.

The SOT23FF package offers an improved thermal resistance of 158ºC/W giving a power rating of 0.8W from a 15mm x 15mm PCB area, thereby substantially increasing power density when compared to standard SOT23 solutions. Power dissipation can rise to 1.96W for applications where the equivalent PCB space of 50mm x 50mm is available.

In high-side switching and load or disconnect switches, the ZXTP19020DFF reduces the voltage drop to just 70mV at 1A and a base drive of 20mA; or 160mV at 2A for a 40mA base drive. This equates to an equivalent resistance of 70mΩ, in a PCB footprint of 2.5mm x 3mm.

Features

• 20V PNP transistors
• Very low saturation voltage
• 7V reverse blocking voltage
• High pulse current
• Low profile, high dissipation SOT23F package

Applications

• Battery charging
• Powerline disconnect switches
• High-side driving
• Motor control
• DC-DC converters
• MOSFET and IGBT gate driving
• LED drive
• Strobe flash
• Micro buffers

For further information, including FREE Samples and a copy of the ZXTN19020DFF and ZXTP25020CFF Datasheet, please click here