Telit Wireless Solutions ME310G1 - ME310 G1-W3 Connected Mode; General Design Rules; Electrical Design Guidelines; Source Power Supply Design Guidelines

ME310G1 Hardware Design Guide
1VV0301588 Rev. 16 Page 30 of 95 2021-10-27
Not Subject to NDA
4.2.5 ME310G1-W3 Connected Mode
Table 21: ME310G1-W3 Connected Mode
4.3 General Design Rules
The Power Supply Design guidelines include three different design steps:
• Electrical design
• Thermal design
• PCB layout
4.3.1 Electrical Design Guidelines
The electrical design of the power supply depends on a drained power source.
The electrical design guidelines categories are:
• +5V input (typically PC internal regulator output)
• +12V input (typically automotive)
• Battery
4.3.1.1 +5V Source Power Supply Design Guidelines
The desired output for the power supply is 3.8V. Since the difference between the input
source and the desired output is negligible, a linear regulator may be used. A switching
power supply will not be suitable because of the low dropout requirements.
• If using a linear regulator, include a heat sink to dissipate excess generated power.
• A low ESR bypass capacitor must be included to stop the current absorption peaks
near the module. The recommended capacitor is 100μF.
• Make sure that the low ESR capacitor on the power supply output is a minimum of
10V nominal.
Mode
Measure
(Typical)
Mode
Description
Connected mode
Average
(mA)
Peak
(mA)
CATM
210
520
1 RB, RMC, TBS=5, QPSK,23dBm,
Band 26, 5
230
460
1 RB, RMC, TBS=5, QPSK, 23dBm,
Band 3