User Guide
Table Of Contents
- APPLICABILITY TABLE
- CONTENTS
- 1. Introduction
- 2. General Product Description
- 3. PINS ALLOCATION
- 4. Power Supply
- 5. DIGITAl SECTION
- 6. RF SECTION
- 7. AUDIO SECTION
- 8. GNSS Section
- 9. Mechanical Design
- 10. APPLICATION PCB Design
- 11. PACKAGING
- 12. Conformity Assessment Issues
- 13. PRODUCT AND SAFETY INFORMATION
- 14. GLOSSARY
- 15. Document History
ME910G1 Hardware Design Guide
1VV0301593 Rev.15 Page
30 of 100 2022-08-23
Not Subject to NDA
General Design Rules
The main guidelines for the Power Supply Design include three different design steps:
• the electrical design of the power supply
• the thermal design
• the PCB layout
Electrical Design Guidelines of the Power Supply
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 can be used.
A switching power supply will not be suitable because of the low drop out
requirements.
• If using a linear regulator, include a proper heat sink to dissipate the 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 the low ESR capacitor on the power supply output is a minimum of 10V.