我目前使用TPS767D301来作为3.3V以及1.9V电压输入是5v，目前芯片发热严重，室温下都有70度，
能否推荐下最新的dc-dc芯片，
5v输入，3.3v输出，1A；5v输入，1.9v输出，1A左右的芯片.
谢谢！
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F28335电源1.9v
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