Quectel SG560D Series - Power Output

Smart Module Series
SG560D_Series_Hardware_Design 51 / 134
Large
Capacitance
Capacitor
Module
RTC
Core
VRTC
C
Figure 11: RTC Powered by Capacitor
⚫ If RTC fails, the module can synchronize time through the network after being powering up.
⚫ The recommended input voltage range for VRTC is 2.0–3.25 V and the recommended typical value is
3.0 V. The average power consumption is 30 μA when VBAT is disconnected.
⚫ When powered by VBAT, the RTC error is 50 ppm. When powered by VRTC, the RTC error is
500 ppm.
⚫ If a rechargeable battery is used, ESR of the battery should be less than 2 kΩ.
3.5. Power Output
The module supports output of regulated voltages for peripheral circuits. During application, it is
recommended to connect a 30 pF and a 10 pF capacitor in parallel to suppress high-frequency noise.
Table 10: Pin Definition of Power Suppy Interface
Pin Name
Pin No.
I/O
Description
Comment
VPH_PWR
420, 421, 424
PO
Power supply for peripherals
Keep on.
1.5 A in total.
LDO7C_3V0
412
PO
3.0 V output
(3.0 V output for sensors and TP)
When using it, it is
recommended to add
1–4.7 μF bypass
capacitors with a total
capacitance not
exceeding 18.8 μF.
LDO13C_2V8
409
PO
2.8 V output
(2.8 V output for LCM)
When using it, it is
recommended to add
1–4 μF bypass
capacitors with a total
capacitance not
exceeding 4 μF.