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How to reduce quiescent current in the bandgap circuit

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kumard35b

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Could anyone help to reduce the quiescent current in the bandgap circuit.

Regards
Kumar
 

Hi kumard35b,

Since your question is too general, I only give some general ideas:
First, you can try to use weak-inversion transistor to realize bandgap circuit.
Second, you can turn off bandgap circuit in power down mode if application allows.

regards,
jordan76
 

Make sure your startup circuit doesn't consume any power when it is started.

Yibin.
 

yibinhsieh said:
Make sure your startup circuit doesn't consume any power when it is started.

Yibin.
Click to expand...

could you tell me startup circuit details, thanks!!

i want to know how to design it,
 

Let me be more specific..I have designed one Bandgap circuit ..for that i am getting a quiescent current of 35mA,the customer is asking me to reduce the quiescent current.
Could anyone propose any circuit or just lower the output resistance is enough.
 

decrease the structure ,i think is a way.
 

kumard35b said:
Let me be more specific..I have designed one Bandgap circuit ..for that i am getting a quiescent current of 35mA,the customer is asking me to reduce the quiescent current.
Could anyone propose any circuit or just lower the output resistance is enough.
Click to expand...
35 mA ? I think it is too large.
the bandgap core can be made < 100uA from many JSSC's paper,
refer to this
 

utilize large resistor to design reference operating point,but it will waste much layout area.
 

kumard35b said:
Let me be more specific..I have designed one Bandgap circuit ..for that i am getting a quiescent current of 35mA,the customer is asking me to reduce the quiescent current.
Could anyone propose any circuit or just lower the output resistance is enough.
Click to expand...
35mA? Did you design in bipolar process?If you design with bipolar process,I think you can decrease the quesicent current by increasing the sample resistor.
 

Large resistor is a good choice
 

35mA? my god. which process?
 

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