User's Manual

GE864
GE864GE864
GE864-
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-QUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User GuideQUAD Automotive V2 Hardware User Guide
QUAD Automotive V2 Hardware User Guide
1vv0300840 Rev.3 2010-04-08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 23 of 71
6. Power Supply
The power supply circuitry and board layout are a very important part in the full product
design and they strongly reflect on the product overall performances, hence read
carefully the requirements and the guidelines that will follow for a proper design.
6.1.
6.1.6.1.
6.1. Power Supply Requirements
Power Supply RequirementsPower Supply Requirements
Power Supply Requirements
POWER SUPPLY
POWER SUPPLYPOWER SUPPLY
POWER SUPPLY
Nominal Supply Voltage 3.8V
Max Supply Voltage 4.2V
Operating Supply Voltage Range 3.4V – 4.2V
Wide Supply Voltage tolerant 3.25V – 4.2V
TIP:
TIP: TIP:
TIP:
the supply voltage is directly measured between VBATT and GND balls. It must
stay within the Wide Supply Voltage tolerant range including any drop voltage
and overshoot voltage (during the slot tx, for example).
NOT
NOTNOT
NOTE:
E:E:
E:
The Operating Voltage Range MUST never be exceeded also in power off
condition; care must be taken in order to fulfill min/max voltage requirement
NOTE:
NOTE: NOTE:
NOTE:
When the power supply voltage is lower than 3.4V, to turn ON the module, the
pad ON# must be tied low for at least 3 seconds. See para 5.1