Provided in space-saving SOT23 and SOT223 packages, the 200 V rated P-channel MOSFETs from Zetex Semiconductors will reduce the size of active clamp designs previously reliant on much larger DPAK and SO8 packages. Two miniature devices are initially offered, the ZXMP2120E5 in the 5-pinned SOT23, and the ZXMP2120G4 in the 4-pinned SOT223. The inter-pin spacing of both package outlines has been maximized by the company in order to maintain resistance to high voltage creepage. In addition, the low gate capacitance P-channel process used in the MOSFETs’ manufacture ensures that ringing is reduced during the switching transient, and very low noise performance is achieved. As P-channel circuitry is simpler to implement than N-channel, the ZXMP2120 MOSFETs will enable designers to produce lower cost active clamps in smaller form factor, 48 V DC/DC forward converters in telecom and server applications.