NE866B1_Hardware_Design_Guide
1VV0301354 Rev. 6
Page
21
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70
2018-02-28
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.
Power Supply Requirements
The external power supply must be connected to VBATT signal and must fulfil the
following requirements:
Power Supply
Value
Power Supply
Nominal Supply Voltage
3.8V
Nominal Supply Voltage
Normal Operating Voltage
Range
3.40 V÷ 4.20 V
Normal Operating Voltage
Range
Extended Operating
Voltage Range
3.10 V÷ 4.20 V
Extended Operating
Voltage Range
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.
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.