> 3.2 | Power Supply

> TC65 needs to be connected to a power supply at the B2B connector (5 pins each BATT+ and GND).
> The power supply of TC65 has to be a single voltage source at BATT+. It must be able to pro vide the peak current during the uplink transmission.
> All the key functions for supplying power to the device are handled by the power management section of the analog controller. This IC provides the following features:

> • | Stabilizes the supply voltages for the GSM baseband using low drop linear voltage regulators.

> • | Switches the module's power voltages for the power-up and -down procedures.

> • | Delivers, across the VEXT pin, a regulated voltage for an external application. This voltage is not available in Power-down mode.

> • | SIM switch to provide SIM power supply.