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ME310G1 Hardware Design Guide
1VV0301588 Rev. 16
Page 26 of 95
2021-10-27
Not Subject to NDA
4
POWER SUPPLY
The power supply circuit and board layout are an important part of the product design.
Make sure to follow the guidelines and requirements for optimal performance.
4.1
Power Supply Requirements
The external power supply must be connected to the VBATT & VBATT_PA signals. The
following are the power supply requirements:
Power Supply
Value
Nominal Supply Voltage
3.8V
Operating Voltage Range
3.2 V - 4.2 V
Extended Voltange Range
2.6 V - 4.5 V
VBATT
min
2.7V
Table 15: Power Supply Requirements
Warning: The range 2.6V - 3.2V can be used only if both USB and 2G
are disabled.
Warning: The modem supply voltage must never exceed the
Extended Operating Voltage Range. Inaccurate implementation of
power supply guidelines can cause a faulty module.
Note: For PTCRB approval on the final product, the power supply
must be within the Operating Voltage Range.
Note: The power supply section of the application must be carefully
designed to avoid excessive voltage drop during peak transmission
current absorptions. If the voltage drops beyond the limits of the
Extended Operating Voltage range, an unintentional module power
off can occur.
Note: At power on, the modem voltage must be at least VBATTmin.