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求两个正负12V转正负5V 电流0.5A DCDC电源芯片,追求效率不要LDO

Other Parts Discussed in Thread: TPS54160, TPS54260

求两个正负12V转正负5V   电流0.5A   DCDC电源芯片,追求效率不要LDO。用电源设计程序搜索好像只能看到正的压降芯片,负输入的不好找