User's Manual

CE910 Family Hardware User Guide
1vv0301010 Rev.11 – 2015-10-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 31 of 75
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’s overall performance. Read carefully the requirements and the
guidelines that 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
3.8V
Normal Operating Voltage range
3.4V ~ 4.2V
Extended Operating Voltage range
3.4V ~ 4.5V
NOTE:
The Operating Voltage Range MUST never be exceeded. Special 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.