DA9063_17 Datasheet, PDF (120/219 Pages) Dialog Semiconductor – System PMIC for Mobile Application Processors

DA9063
System PMIC for Mobile Application Processors
9 Definitions
9.1 Power Dissipation and Thermal Design
When designing with the DA9063, consideration must be given to power dissipation as the level of
integration of the device can result in high power when all functions are operating with high battery
voltages. Exceeding the package power dissipation capabilities results in the internal thermal sensor
shutting down the device until it has sufficiently cooled.
The package includes a thermal management paddle to improve heat spreading into the PCB.
For Linear Regulators:
Linear regulators operating with a high current and high differential voltage between input and output
dissipate the following power:
(
)
Example: a regulator supplying 150 mA at 2.8 V from a fully-charged lithium battery (VDD=4.1 V):
(
)
For Switching Regulators:
Therefore,
(
)
(
)
Example: an 85 % efficient buck converter supplying 1.2 V at 400 mA:
(
)
As the DA9063 has multiple regulators, each supply must be separately considered and their powers
summed to give the total device dissipation (current drawn from the reference and control circuitry
can be considered negligible in these calculations).
Datasheet
CFR0011-120-00
DA9063_2v1
120 of 219
23-Mar-2017
© 2017 Dialog Semiconductor