User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved. Page 39 of 97
• When using a linear regulator, a proper heat sink
shall be provided in order to dissipate the power
generated.
• A Bypass low ESR capacitor of adequate capacity must
be provided in order to cut the current absorption
peaks close to the module, a 100µF tantalum capacitor
is usually suited.
• Make sure the low ESR capacitor on the power supply
output (usually a tantalum one) is rated at least 10V.
• A protection diode can be inserted close to the power
input, in order to save the module from power polarity
inversion.
An example of linear regulator with 5V input is:
6.3.1.2. +12V input Source Power Supply Design Guidelines
• The desired output for the power supply is 3.8V,
hence, due to the big difference between the input
source and the desired output, a linear regulator is
not suited and shall not be used. A switching power
supply will be preferable because of its better