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ADP1607 boost DCDC; Max Vin voltage is Vout?

Question asked by moto on Jun 23, 2014
Latest reply on Jul 13, 2014 by moto

Hi

ADP1607 datasheet say "0.8V to Vout input voltage range"

But when Vin=Vout, it doesn't work. I think.

 

In other colum, it need reduce diode or cascode FET voltage , I think.

"To use the ADP1607 in the VOUT = 2.5V portion of your application, you would have to reduce the maximum input voltage to 2.5V through diodes or a cascode FET."

Efficiency of ADP1607 at 32 uA

 

1. Minimum ON time of this device?

     I would like estimate min duty.

   (Why it doesn't have timing condition?)

2. The condition that  Vin = Vout is ok

    How comes input voltage range is to Vout?

3. If Vin = Vout is OK , why is it missing that data in Fig17?

 

Sorry it might   be primitive questions.

 

Regards

moto

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