SI4420DY Datasheet, PDF (2/3 Pages) NXP Semiconductors – N-channel enhancement mode field-effect transistor

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Notes:
1: R_qJA is the sum of the junction-to-case and case-to-ambient resistance where the case thermal reference is defined as the solder mounting surface of the
drain pins. R_qJC is guaranteed by design while R_qCA is determined by the user's board design.
a) 50° C/W when
mounted on a 1 in²
pad of 2 oz. copper.
Scale 1 : 1 on letter size paper
2: Pulse Test: Pulse Width £ 300 ms, Duty Cycle £ 2.0%
b) 105° C/W when
mounted on a 0.04 in²
pad of 2 oz. copper.
c) 125° C/W on a minimum
mounting pad.
Si4420DY Rev. B