SimCom SIM7020E - 3.10 Power Supply Output

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SIM7020_Hardware_Design_V1.02 27 2018-07-25
Table 16: ADC electronic characteristics
Characteristics
Min. Typ. Max. Unit
Resolution
–
10
–
Bits
Input Range
0.1 – 1.4
V
Note: “AT+CADC” can be used to read the voltage of the ADC pin, for more details, please refer to
document [1].
3.10 Power Supply Output
SIM7020 has a LDO power output named VDD_EXT. The output voltage is 1.8V. Meanwhile it has
a DCDC power output named VDD_3V3, which voltage range is 3.3V-3.5V (depend on VBAT).
Both of them are not present in PSM mode.
VDD_EXT
( Output)
64msVBAT
PWRKEY
(
Input)
Figure 20
：
Power on sequence of the VDD_EXT
VDD_3V3
( Output)
70msVBAT
PWRKEY
( Input)
Figure 21
：
Power on sequence of the VDD_3V3
Table 17: Electronic characteristic
Pin name Description Min. Typ. Max. Unit
VDD_EXT
V
VDD_EXT
Output voltage
1.7
1.8
1.9
V
I
O
Output current - - 50 mA
VDD_3V3
V
VDD_3V3
Output voltage 3.2 3.3 V B AT-0.1 V
I
O
Output current - - 50 mA