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TLV61225 efficiency trouble at light load. Is TPS61221 a better choice?

Other Parts Discussed in Thread: TLV61225, TPS61221, TPS61098

I've got a product powered by a single AA battery that mostly draws something on the order of a dozen µA or so most of the time but has 35 ms load pulses of 5 mA.

I've been using the NCP1402 with great success, but it's EOL, so I'm redesigning the power supply. I built a prototype with the TLV61225. With a 1.8 volt bench supply, the NCP board draws 30 µA. The TLV61225 prototype draws 80 µA. Tripling the standby power is obviously unacceptable. I'm using a 10 µH inductor and 22 µF ceramic output filter cap.

I've ordered some TPS61221 to try. Luckily they're pin compatible. The datasheet looks promising, but are they going to be closer in efficiency to the NCP? What else can I do to improve the light load efficiency of this design?