AN1294

LDMOS in PowerSO-10RF/typical RF performances

Doc ID 7604 Rev 3

9/20

4

LDMOS in PowerSO-10RF/typical RF performances

Today LDMOS transistors are used successfully in several digital applications such as

cellular base stations, HDTVs, TETRA applications, etc., and have already proven their

advantages when compared to bipolar transistors. Such advantages include:

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higher power gain

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more constant input impedance under varying drive levels

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better IMD performances

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easier biasing

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gain control by varying the DC gate bias voltage

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better thermal behavior

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lower overall system costs

Moreover, LDMOS products in PowerSO-10RF display similar or better performances than

equivalent products in ceramic packages, such as power gain (similar) and thermal

resistance (~10% lower).

Figure 4.

PD57045S-E in PowerSO-10RF versus SD57045-01 in ceramic package

Figure 5.

Power gain versus output power/ceramic vs. plastic

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