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TPS61021A 负载能力不足

Other Parts Discussed in Thread: TPS61021A

我使用TPS61021A设计如下电路,发现带负载能力不足。

3.3V供电,在TPS61021A输出3.3V接5W 5R的负载水泥电阻,发现输出电流只有300mA不到,输出电压被拉低至0.5V左右。
以下功率电感型号,请帮忙看下,谢谢。

WPN201610UR47MT        IND-WIRE WOUND POWER INDUCTOR-0.47uH,+/-20%,DCR=0.028Ω,Isat=5A,Irms=4.1A;-2016       SUNLORD