SIM8300G-M2 Hardware Design V1.01 Draft

SIM8300G-M2 Hardware Design V1.01
www.simcom.com
21
/
77
circuit board wider than 3.0mm to minimize PCB trace impedance.
1. C5 is 220 µF tantalum capacitor, ESR=0.7Ω.
2. C1 and C2 are multi-layer ceramic chip (MLCC) capacitors from 33pF to 1uF with low ESR in high
frequency band, which can be used for EMC performance.
3. D2 is used for ESD protection and D1 is used for surge protection.
Table 8: Recommended D1 and D2 list
No.
Manufacturer
Part number
VRWM
Package
Ref. Designator
1
JCET
ESDBW5V0A1
5V
DFN1006-2L
D2
2
WAYON
WS05DPF-B
5V
DFN1006-2L
3
LRC
LEDZ5.1BT1G
5.1V
SOD-523
D1
4
Prisemi
PZ5D4V2H
5.1V
SOD-523
Power supply layout guidelines:
Both VBAT and return trace should be as short and wide as possible to minimize the voltage drop.
The width of VBAT trace cannot be less than 3.0mm.
These capacitors should be placed as closely as possible with VBAT pins.
The VBAT trace should pass through TVS diode, zener diode and capacitors, and then VBAT pins. The
capacitor of the small value should be placed close to VBAT pins.
The PCB design must have a solid ground plane as the primary reference plane for most signals.
3.1.2 Recommended Power Supply Circuit
It is recommended to use a switching mode power supply. Make sure it can provide current be large
enough.
The switching mode power output need to divide BB power supply and RF mmw antenna power supply.
Figure 6 shows the switching mode power supply reference circuit with 12V input and 3.8V output.
NOTE