Power Output - Quectel Smart LTE Module Series Hardware Design

If RTC is ineffective, it can be synchronized through network after the module is powered on.

2.0V~3.25V input voltage range and 3.0V typical value for VRTC, when VBAT is disconnected.

When powered by VBAT, the RTC error is 50ppm. When powered by VRTC, the RTC error is about
200ppm.

If the rechargeable battery is used, the ESR of battery should be less than 2K, and it is
recommended to use the MS621FE FL11E of SEIKO.

3.7. Power Output

SC650T supports output of regulated voltages for peripheral circuits. During application, it is
recommended to use parallel capacitors (33pF and 10pF) in the circuit to suppress high frequency noise.
Table 6: Power Description
Pin Name
LDO5_1P8
LDO6_1P8
LDO10_2P8
LDO17_2P85
LDO13_3P075
LDO2_1P1
LDO22_2P8
LDO23_1P2
SD_LDO12
SD_LDO11
USIM1_VDD
USIM2_VDD
SC650T_Hardware_Design
Default Voltage (V)
1.8
1.8
2.8
2.85
3.125
1.1
2.8
1.2
1.8/2.95
2.95
1.8/2.95
1.8/2.95
Drive Current (mA)
20
300
150
300
150
1200
150
600
50
800
50
50
Smart LTE Module Series
SC650T Hardware Design
Idle
Keep
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