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TPS61088-Q1: The output voltage is down during load transient

Part Number: TPS61088-Q1
Other Parts Discussed in Thread: TPS61088

Hi Team,

My customer now use TPS61088-Q1 EVM to test the performance of TPS61088.

They use TPS61088-Q1 boost 3V to 9V. The load current is total nealy 250mA, the load peak current is 300mA.

However, when test the output voltage during the load transient.(300mA Ipp), the Vout dropped from 9V to 4V.

Customer said the the dropped voltage is too big for their application. If it dropped from 9V to 8.5V when Iout change from 100mA to 300mA,customer could accept. However, customer can't accept the 5V voltage dropped.

Customer now use EVM to test and no more change in the demo. Could you please kindly give some advice?