User's Manual

GE866-DUAL Hardware User Guide
1VV0301051 Rev. 2 – 2014-04-07 7
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Reserved. Page 24 of 82
Mod. 0805 2011-07 Rev.2
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 performance, hence read the
requirements carefully 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 3.40 V÷ 4.20 V
Extended Operating Voltage Range
3.
10
V
÷ 4.50 V
NOTE:
The Operating Voltage Range MUST never be exceeded; care must
be taken when designing the application’s power supply section
to avoid having an excessive voltage drop.
If the voltage drop is exceeding the limits it could cause a
Power Off of the module.
The Power supply must be higher than 3.22 V to power on the
module.
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
complete assumption and application of the HW User guide
suggestions.
NOTE:
When the power supply voltage is between 3.22V and 3.4V, after
5000 m-seconds, the V_AUX / PWRMON pin will be at the high