User Guide

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ME3630
Hardware Development Guide
Figure 2–3 Reference circuit of DC-DC
 Option 2:LDO
The over-current capability of LDO is above 2.5A. This LDO is apply to this situation: input and output voltage
difference is small.
The reference power supply circuit design with LDO is shown as figure below:
Figure 2–4 Reference circuit of LDO
2.5. TURN ON SCENARIOS
When MCU can provide high/low level pulse with adjustable length, the reference circuit to turn-on/off
module is as shown in the following figure below.
The resistors in Figures below are only the recommended value and they need to adjust according to the
actual situation.
Power-on by dynatron, the circuit ① connect ON/OFF to high level to power-on the module, the circuit ②
can connect ON/OFF to low level to power-on the module