LN920 HW Design Guide
1VV0301730 Rev. 1
Page 28 of 81
2021-08-11
Not Subject to NDA
4.
POWER SUPPLY
Both power supply circuitry and board layout are a very important parts of the full product
design and they strongly reflect on the product overall performances, so the
requirements and the guidelines that will follow should be read carefully for a proper
design.
Power Supply Requirements
The LN920 power requirements are as follows:
Power Supply
Value
Nominal Supply Voltage
3.3V
Supply Voltage Range
3.1 V - 3.6 V
Maximum ripple on module input supply
TBD
Table 14
:
Power Supply Requirements
Note: The Operating Voltage Range MUST never be exceeded; the
application’s power supply section must be designed with care to
avoid an excessive voltage drop.
If the voltage drop exceeds the limits, it may cause unintentional
module power off of LN920.
The minimum voltage must be at least
VBATT
min
to power on the
module.
Power Consumption
Below table provides typical current consumption values of LN920 for various operation
modes.
