User Guide

ME310G1 Hardware User Guide
1VV0301588 Rev. 4 Page 27 of 77 2020-01-21
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 & VBATT_PA signals and must
fulfil the following requirements:
Power Supply
Value
Nominal Supply Voltage
3.8V
Operating Voltage Range
3.40 V - 4.20 V
Extended Voltange Range
2.60 V - 4.50 V
VBATT
min
2.60V
CAUTION:
The range 2.60V - 3.20V can be used only if both USB and 2G are
disabled.
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.
NOTE:
For PTCRB approval on the final products the power supply is
required to be within the “Normal Operating Voltage Range”.