User's Manual

GL865 Hardware User Guide
1vv0300910 Rev.1 – 2011-07-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 27 of 79
A protection diode should be inserted close to the power input,
in order to save the GL865 from power polarity inversion. This
can be the same diode as for spike protection.
An example of switching regulator with 12V input is in the below
schematic (split in 2 parts):
6.3.1.3. Battery Source Power Supply Design Guidelines