5.11 Thermal Resistance Characteristics
|
VALUE |
UNIT |
θJA |
Junction-to-ambient thermal resistance, still air(1) |
VQFN 16 pin (RGY) |
41.8 |
ºC/W |
TSSOP 20 pin (PW20) |
92.6 |
TSSOP 16 pin (PW16) |
104.1 |
θJC |
Junction-to-case (top) thermal resistance(2) |
VQFN 16 pin (RGY) |
49.1 |
ºC/W |
TSSOP 20 pin (PW20) |
26.1 |
TSSOP 16 pin (PW16) |
38.5 |
θJB |
Junction-to-board thermal resistance(3) |
VQFN 16 pin (RGY) |
18.5 |
ºC/W |
TSSOP 20 pin (PW20) |
45.0 |
TSSOP 16 pin (PW16) |
49.1 |
(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.