hello friends,
I have a digital circuit consisting of square wave oscillator ,counters,flip flops etc....Now the thing is i want a 5 v supply for the whole logic block.Input voltage is 8-12 V.5V regulator is what i need.
I thought of designing a buck converter.So calculated the average current of the whole cmos circuit and found it to be around 3 mA.
Two questions:
1)Somebody help me out in designing a buck regulator for this much low current or is it wise to use a LDO.
2) My next question is only the average current is 3 mA.But the distribution of the current isn't going to be uniform.Only during switching the current will be there in the circuit that too for a very low time.Also that current will be much greater than 3 mA (Hope i am correct).Now how do i design a buck converter.
Thanks,
Datta
I have a digital circuit consisting of square wave oscillator ,counters,flip flops etc....Now the thing is i want a 5 v supply for the whole logic block.Input voltage is 8-12 V.5V regulator is what i need.
I thought of designing a buck converter.So calculated the average current of the whole cmos circuit and found it to be around 3 mA.
Two questions:
1)Somebody help me out in designing a buck regulator for this much low current or is it wise to use a LDO.
2) My next question is only the average current is 3 mA.But the distribution of the current isn't going to be uniform.Only during switching the current will be there in the circuit that too for a very low time.Also that current will be much greater than 3 mA (Hope i am correct).Now how do i design a buck converter.
Thanks,
Datta