Users Manual Part 1

SIM8260A_Hardware Design_V1.05
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Figure 7: Linear regulator reference circuit

An extra minimum load of R3 is required, to ensure it work properly under light load in sleep mode
and power off mode. For the details about minimum load, please refer to specification of
MIC29502WU.
Table 11: Recommended power chip list
Name
Manufacturer
Model
U1
MICREL
MIC29502WU
The following figure shows the switching mode power supply reference circuit with 5~12V input and 3.8V
output.
Figure 8: Switching mode power supply reference circuit
The following figure shows the switching mode power supply reference circuit with 8.8~16V input and
3.8V output.
NOTE