PARAMETER |
VALUE |
UNIT |
RθJA |
Junction-to-ambient thermal resistance, still air(1) |
LQFP (PZ) |
122 |
°C/W |
BGA (ZQW) |
108 |
RθJC(TOP) |
Junction-to-case (top) thermal resistance(2) |
LQFP (PZ) |
83 |
°C/W |
BGA (ZQW) |
72 |
RθJB |
Junction-to-board thermal resistance(3) |
LQFP (PZ) |
98 |
°C/W |
BGA (ZQW) |
76 |
(1) The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, High-K board, as specified in JESD51-7, in an environment described in JESD51-2a.
(2) The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDEC-standard test exists, but a close description can be found in the ANSI SEMI standard G30-88.
(3) The junction-to-board thermal resistance is obtained by simulating in an environment with a ring cold plate fixture to control the PCB temperature, as described in JESD51-8.