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LM2698: LM2698

Amod Mujumdar30
Prodigy 160 points
Part Number: LM2698

Hi ,

We are using LM2698 as boost converter. 

Input is 8.4V. 

Output = 12V 

We got 12V proper o/p. However we would like to use SHUTDOWN feature of same IC. Here we have controlled SHDN pin by means of Transistor. When we turned ON transistor, SHDN pin goes to zero but o/p does not switch from 12V to 0V rather it drops to only 9V. 

How to resolve this ?

 

Circuit is attached. 

LM2698.pdf

Regards,

Amod