GL865-DUAL V3 Hardware User Guide
1vv0301018 Rev.5 – 2013-08-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 24 of 76
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 logic level and the module can be consider fully
operating. See Par. 5.1.