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TPS610986: Efficiency vs Vout

Part Number: TPS610986

Hello,

Updating design on a disposable medical device.  Powered by SR44 high drain silver oxide cells with BOL = 1.5 and EOL = 1.0.  Have placed 2 cells in parallel to lower the I2R losses.

Two questions.

1. Can someone provide me information on the efficiency of the TPS610986 under the following conditions:  Vout =1.8 @ 40ma with Vin = 1.0

2. What is ideal value for L and Cout for those conditions?

Thank you.