Zetex Semiconductors has offered a range of low voltage bipolar transistors. Zetex’s range of low voltage bipolar transistors extends the power handling capability of the SOT23 package, enabling designers to shrink products by replacing much larger SOT89 and SOT223 equivalent parts.
Using its advanced lead frame design and bipolar process capability, Zetex is offering two NPN and two PNP devices, each capable of dissipating up to 1.25W. The ZXTN23015CFH and ZXTN25020DFH NPNs have VCE ratings of 15V and 20V respectively, while the ZXTP23015CFH and ZXTP25040DFH PNPs are in turn rated for 15V and 40V operation.
Handling continuous currents of up to 6A, the transistor series enables significant increases in power density to be made. Also, by supporting pulse current peaks of up to 15A, the transistor series provides the ability to drive higher capacitance MOSFETs and IGBTs at much higher speed in power supply applications.
Also, characterised by the transistors’ low saturation voltage – 30mV at 1A collector current for the 15V NPN – the SOT23 bipolars make efficient switches for battery powered equipment, and ensure heat dissipation is kept to an absolute minimum. The transistors’ high gain means large loads can be driven by ICs without the need for additional buffer circuitry.