Power Supply; Power Supply Pins; Decrease Voltage Drop - Quectel SC20-WL Hardware Design

145, 146,
151, 152,
153, 154,
155, 156,
157, 158,
159, 183,
187, 190,
191, 194,
195, 196,
197, 199,
202, 203,
204, 205,
206, 207,
210
NOTE
1)
GPIO_68 and GPIO_88 cannot be pulled up during start-up.

3.4. Power Supply

3.4.1. Power Supply Pins

SC20-WL provides two VBAT pins dedicated to connection with the external power supply. The two
VBAT_BB pins are used for module's baseband part. The power supply range of the module is 3.5V~4.2V,
and the recommended value is 3.8V. VBAT performance, such as load capacity, ripple and spikes will
directly affect the performance and stability of the module. If the voltage drops below 3.1V, the module will
be turned off automatically.

3.4.2. Decrease Voltage Drop

Make sure the input voltage will never drop below 3.1V. If the voltage drops below 3.1V, the module will
be turned off automatically.
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