Analog Microelectronics, Inc.
3A Low Dropout
Positive Voltage Regulator
AME1085
5. Thermal consideration
The AME1085 series contain thermal limiting cir-
cuitry designed to protect itself for over-tempera-
ture conditions. Even for normal load conditions,
maximum junction temperature ratings must not
be exceed. As mention in thermal protection
section, we need to considerall sources of ther-
mal resistance between junction and ambient.
It includes junction-to-case, case-to-heat-sink in-
terface and heat sink thermal resistance itself.
Junction-to-case thermal resistance is specified
from the IC junction to the bottom of the case
directly below the die. Proper mounting is re-
quired to ensure the best possible thermal flow
from this area of the package to the heat sink.
The case of all devices in this series is electri-
cally connected to the output. Therefore, if the
case of the device must be electrically isolated,
a thermally conductive spacer is recommended.
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AME [ ANALOG MICROELECTRONICS ]
