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Fast transient LDO: TPS7A7100 or the any other LDO

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: TPS7A7100, TPS7A87, LP5912

Customer is considering TPS7A7100, but it was failed for FPGA's request transient.

Request spec is below.

【Request spec】

・Vin： 1.8V

・Vout： 1.0V

・Iout： 382mA_max

　Load transient： 61mA → 382mA at 1.4μs

　　　　　　　　　⇒0.23A / μS

Is there proposed measure or the other matching LDO?

TPS7A7100 is modified below capasitor, but it didn't catch up transient spec.

・Cin： 10μF + 0.1μF

・Cout： 20μF + 0.1μF

Best regards,

Satoshi