7~25V输入,5V 1A输出。
紧急情况输入可能最低到5V,这种情况下希望还能输出,而且压降尽量少,即输出尽量高,至少应该在4.2V+
由于手执设备,电路面积要求很严,希望外围器件和DCDC能尽量少和小
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