User's Guide

LE920A4 HW User Guide Power Supply
Doc#: 1VV0301261 Power Supply Requirements
Rev. 4.7.1 Page 54 of 124 2019-11-21
6. Power Supply
The power supply circuitry and board layout are very important parts of the full product
design, with critical impact on the overall product performance. Read the following
requirements and the guidelines carefully to ensure a good and proper design.
Power Supply Requirements
The module’s power requirements are as follows:
Table 18: Power Supply Requirements
Nominal supply voltage 3.8V
Supply voltage range 3.4V – 4.2V
Max ripple on module input supply 30 mV
Table 19 provides typical current consumption values of the module for the various
available modes.
Table 19: Current Consumption
Mode Average (Typ.) Mode Description
Switched Off
Switched off 25 µA Module supplied but switched off (RTC is on)
Idle Mode (Standby Mode; No Call in Progress)
AT+CFUN=4 1.0 mA
Tx and Rx disabled; module is not registered on
the network (Flight mode)
DRx
GSM
2.0 mA DRx2
1.4 mA DRx5
WCDMA
1.4 mA DRx7
1.2 mA DRx8
LTE
1.8 mA Paging cycle #128 frames (1.28 sec DRx cycle)
1.4 mA Paging cycle #256 frames (2.56 sec DRx cycle)
Operative Mode (LTE)
LTE (0 dBm) 190 mA
LTE CAT 4 Channel BW 20 MHz, RB=1,
Tx = 0 dBm
(Test case: BAND 1, Channel 300)