User's Manual

GE865 Hardware User Guide

1vv0300799 Rev.6 - 04/06/09

5 Power Supply

The power supply circuitry and board layout are a very important part in the full product design and

they strongly reflect on the product overall performances, hence read carefully the requirements and

the guidelines that will follow for a proper design.

5.1 Power Supply Requirements

The external power supply must be connected to VBATT & VBATT_PA signals and must fulfill the

following requirements:

POWER SUPPLY

Nominal Supply Voltage

3.8 V

Normal Operating Voltage Range

3.4 V - 4.2 V

Extended Operating Voltage Range

3.22 V - 4.5 V

NOTE: The Operating Voltage Range MUST never be exceeded; care must be taken in order to fulfill

min/max voltage requirement

NOTE: Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in voltage (regarding

MIN Extended Operating Voltage) MUST never be exceeded;

The “Extended Operating Voltage Range” can be used only with completely assumption and application

of the HW User guide suggestions.