Power Supply Output - Quectel SG865W Series Hardware Design

⚫
When VBAT is disconnected, the recommended input voltage range for VRTC is 2.5–3.25 V and the
recommended typical value is 3.0 V.
⚫
When powered by VBAT, the RTC error is 50 ppm. When powered by VRTC, the RTC error is about
200 ppm.
⚫ If a rechargeable battery is used, ESR of the battery should be less than 1 kΩ, and it is recommended
to use MS621FE FL11E of SEIKO.

3.5. Power Supply Output

The module supports regulated voltages output for peripheral circuits. During application, it is
recommended to use 33 pF and 10 pF capacitors in parallel in the circuit to effectively suppress
high-frequency noise.
Table 10: Power Supply Description
Pin Name
LDO2A_3V1
LDO10A_2V9
LDO12A_1V8
LDO13A_3V0
LDO14A_1V8
LDO1C_1V8
LDO7C_2V85
LDO8C_1V8
LDO10C_3V3
LDO11C_3V1
VREG_BOB
VREG_S4A_1V8
VPH_PWR
SG865W_Series_Hardware_Design
Default Voltage (V)
3.1
1.8
1.8
3.0
1.8
1.8
2.85
1.8
3.3
3.1
3.3
1.8
VBAT
Drive Current (mA)
150
600
300
150
300
150
600
150
600
600
2000
500
2000
Smart Module Series
Standby
Keep ON
Keep ON
Keep ON
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