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请问能用非隔离DCDC模块输出负3.3V吗?

Other Parts Discussed in Thread: PTR08060W

我想使用TI的电源模块PTR08060W(输入4.5V~14V转0.6V~5.5V  6A电流能力)产生一个-3.3V(2A)。

能否将Vin直接连接-5V使得Vout输出-3.3V

还是将Vin连接+5V,Vout连Gnd,使得Gnd管脚输出-3.3V(相当于DCDC将+8.3V转为3.3V)

请问一下这两种方案有可以实现输出-3.3V(2A)能力的吗?