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LM25141-Q1: efficiency at light load

Part Number: LM25141-Q1
Other Parts Discussed in Thread: LM25148-Q1

Hi team,

customer use LM25141-Q1 to power on DDR, the current is 16A. because the DDR is in sleep mode, the current at sleep is 70mA, customer need high efficiency at light load.

so, the LM25141-Q1 seems not suitable. 

what's your suggestions or recommendation at this applications?

thank you