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TPS63001DRCR 电感发热过大问题



请教一个问题,我使用TPS63001DRCR 做3.3V固定电压输出电路。按照datasheet的参考电路设计。输入电压5V左右,输出测试是3.3V。

但是L1发热很严重。请教一下是什么原因,如何改进? 另外尽可能降低电源管理模块功耗,应该注意哪些问题,谢谢!

原理图:

PCB layout: