AME, Inc.
1A Low Dropout
Positive Voltage Regulator
AME1117
5. Thermal Consideration
The AME1117 series contain thermal limiting circuitry
designed to protect itself from over-temperature condi-
tions. Even for normal load conditions, maximum junc-
tion temperature ratings must not be exceeded. As men-
tioned in thermal protection section, we need to consider
all sources of thermal resistance between junction and
ambient. It includes junction-to-case, case-to-heat-sink
interface 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 required to ensure the best
possible thermal flow from this area of the package to the
heat sink. The case of all devices in this product series is
electrically connected to the output. Therefore, if the case
of the device must be electrically isolated, a thermally
conductive spacer is recommended.
Rev.S.02
11
AME [ ANALOG MICROELECTRONICS ]
