Smart Module Series
SC606T Series Hardware Design
SC606T_Series_Hardware_Design 37 / 116
3.4. Power Supply
3.4.1. Power Supply Pins
The module provides 3 VBAT pins and 2 VPH_PWR pins. VBAT pins are dedicated for connection with
an external power supply. VPH_PWR pins can supply power for peripherals, and they can provide a
maximum continuous current of 1 A approximately. The value of capacitors placed on the VPH_PWR pins
should not exceed 120
μF.
3.4.2. Decrease Voltage Drop
The power supply range of the module is from 3.55 V to 4.4 V, and the recommended value is 3.8 V. The
power supply performance, such as the power supply capacity and voltage ripple, directly influences the
module’s performance and stability. Under extreme conditions, the module may have a transient peak
current up to 3 A. If the power supply capacity is not sufficient, there will be the risk that the voltage drops
below 3.1 V and as a result the module powers off automatically. Therefore, it is necessary to ensure that
the input voltage never drops below 3.1 V.
GNSS_LNA_
EN
202
DO
GNSS LNA enable
control
For test purpose only.
If unused, keep this
pin open.
GRFC_5
242
DIO
Generic RF
controller
Only used for RF
tuner control.
GRFC_7
241
DIO
Generic RF
controller
S1A
215
S1A and S1B are
connected in the
module
S1B
216
S2A
211
S2A and S2B are
connected in the
module
S2B
233
Reserved Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RESERVED
17, 21
–29, 153–158, 161, 162, 164–166, 212
–
214, 217, 218,
222, 235, 239, 240
Keep these pins open.