Power Output - Quectel SG560D Series Hardware Design

Large
Capacitance
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.
VPH_PWR 420, 421, 424
LDO7C_3V0 412
LDO13C_2V8 409
SG560D_Series_Hardware_Design
VRTC
C
Figure 11: RTC Powered by Capacitor
I/O Description
PO Power supply for peripherals
3.0 V output
PO
(3.0 V output for sensors and TP)
2.8 V output
PO
(2.8 V output for LCM)
Smart Module Series
RTC
Core
Module
Comment
Keep on.
1.5 A in total.
When using it, it is
recommended to add
1–4.7 μF bypass
capacitors with a total
capacitance not
exceeding 18.8 μF.
When using it, it is
recommended to add
1–4 μF bypass
capacitors with a total
capacitance not
exceeding 4 μF.
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