User's Manual

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

page 23 of 79

6. 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.

6.1. 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÷ 4.20 V

Extended Operating Voltage

Range

3.22 V÷ 4.50 V

NOTE:

The Operating Voltage Range MUST never be exceeded; care must be

taken in order to fulfil 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.

NOTE:

When the power supply voltage is lower than 3.4V, after 4000 m-

seconds, the

V_AUX / PWRMON

pin will be at the high logic level

and the module can be consider fully operating. See para 5.1.