FN990
Family Hardware Design Guide
1VV0301752 Rev. 3 Page 27 of 92 2022-10-07
Not Sub
ect to NDA
4. POWER SUPPLY
The power supply circuitry and board layout are very important areas of the whole
product design, with critical impact on the overall product performance. Please follow
carefully the following requirements and guidelines to ensure reliable and stable design.
Power Supply Requirements
The FN990 Family power requirements are as follows:
Power Supply Value
Nominal Supply Voltage 3.3V
Supply Voltage Range 3.135 V – 4.4 V
Maximum ripple on module input supply 30 mV
Peak current consumption
3.3 V @ 4 A
Table 15: Power Supply Requirements
Power Consumption
Mode
Average
[Typ.]
Mode Description
IDLE Mode
CFUN=1 35mA
No call connection
USB is connected to a host
Airplane Mode (PSMWDISACFG=1, W_DISABLE_N: Low)
CFUN=4 < 3mA
Tx and Rx are disabled; module is not registered on the
network (Airplane mode)
USB is disconnected
Standby Mode (PSMWDISACFG=1, W_DISABLE_N: Low)
CFUN=1 < 5mA
Module cycles between wake and sleep
USB is disconnected
Operative Mode (WCDMA)
WCDMA Voice 850mA WCDMA B1 voice call (Tx=23dBm)
WCDMA HSPA 650mA WCDAM data call (DC-HSDPA up to 42Mbps, Max through-put)
Operative Mode (LTE)
Single mode
(1DL/1UL SISO)
800mA Non-CA ,B2 BW 10MHz, 1 RB, 23dBm, QPSK DL / QPSK UL
2DLCA (4x4MIMO) with
2ULCA(SISO)
(TBD) mA
CA_2A-66A, BW 20MHz, Full RB, 256QAM DL / 256QAM
UL(800Mbps DL / 170Mbps UL)
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