Power Interfaces; Power Supply Architecture - Digi ConnectCore 6UL Hardware Reference Manual

About the ConnectCore® 6UL

Power interfaces

Power supply architecture

The ConnectCore 6UL requires a primary power supply input. This supply is the main power domain to
the on-module NXP PF3000 power management IC (PMIC), which generates all required supply
voltages for the module as well as the external interfaces. The system can be powered from voltages
up to 5.5V. See Powering the system from a nominal 5V power supply (4.5V to 5.5V)
system for battery-powered applications (3.7V - 4.5V)
ConnectCore 6UL module.
The ConnectCore 6UL module has a dedicated pin for connecting a coin cell backup battery or
supercapacitor. You can enable a coin cell charger on the PMIC with Li-ion rechargeable batteries. This
backup battery or supercapacitor is mandatory if RTC time must persist after the module has been
disconnected from main power. You must also follow the recommended diode configuration as shown
in the diagrams below to make sure the module holds the system time.
If RTC time retention is not required, you can remove the circuitry from your design and connect the
3.3V voltage regulator directly to the VCC_MCA and MCA_VIN_DET pins.
Powering the system from a nominal 5V power supply (4.5V to 5.5V)
ConnectCore® 6UL Hardware Reference Manual
for recommended power schemes for the
Power interfaces
and Powering the
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