Telit Wireless Solutions SE868SY-D, Hw Design Manual, Page: 16 / 44

SE868SY-D Hardware Design Guide
1VV0301705 Rev. 5 Page 16 of 44 2021-12-15
Not Subject to NDA
Low Power P/N
GPS L1 only GPS L1+L5
GPS, GLO, GAL, QZSS,
L1+L5
Acquisition (avg) 38 mW 43 mW 40 mW
Acquisition (max) 41 mW 45 mW 49 mW
Tracking (avg) 20 mW 28 mW 34 mW
Idle (avg) 8 mW
Deep Sleep 50
µ
W
Table 10: Power Consumption in Low Power P/N
Note: It is recommended to reach the Sleep state only from Idle. Setting the
device in Sleep mode directly from Exec state may result in higher-than-
normal power consumption.
General Design Rules
The principal guidelines for the Power Supply Design embrace three different design
steps:
• Electrical design
• Thermal design
• PCB layout
4.3.1. Electrical Design Guidelines
The electrical design of the power supply strongly depends on the chosen power source.
The following diagram depicts an example of a suitable linear voltage regulator:
Figure 3: Example of a suitable Linear Voltage Regulator
To further reduce the power consumption, DC-DC converters can be used instead of LDO.
Figure 4 and Figure 5 show a reference design for generating the 1.8 V voltage and the
0.8V (to be provided on PIN 27 only in case of low power P/N). As depicted in Figure 5, in