User's Manual

LE910 V2 HARDWARE USER GUIDE 1VV0301200 Rev.2 Preliminary • 2015-08-04 21 of 81
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4 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.
4.1 Power Supply Requirements
The external power supply must be connected to VBATT & VBATT_PA signals and must fulfil the following
requirements:
Power Supply
Value
Nominal Supply Voltage
3.8V
Normal Operating Voltage Range
3.40 V÷ 4.20 V
Extended Operating Voltage Range
3.10 V÷ 4.50 V