User Guide

ME310G1 Hardware Design Guide
1VV0301588 Rev. 11 Page 29 of 91 2021-03-16
used. A switching power supply will not be suited due to the low drop out
requirements.
• 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 capacitor is usually
suitable.
• Make sure the low ESR capacitor on the power supply output is rated at least 10V.
An example of linear regulator with 5V input is:
Figure 2: example of linear regulator with 5V input
4.3.1.2. +12V Source Power Supply Design Guidelines
• The desired output for the power supply is 3.8V, so 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 efficiency.
• When using a switching regulator, a 500kHz or higher switching frequency
regulator is preferable due to its smaller inductor size and its faster transient
response. This allows the regulator to respond quickly to the current peaks
absorption.