Bosses, why AMS1117-3.3 V, 5 V input, the output is only 3.6 V, is this why ah

CodePudding user response:

5 v look whether no-load voltage and load it again

CodePudding user response:

The output voltage is a little fluctuation, have add filter capacitor? Add a 10 uf and nf 100 capacitance,

CodePudding user response:

Pin a wrong.

CodePudding user response:

reference 1/f, snow-capped mountains strange barbary response:

5 v is a no-load voltage and load it again look at

Should add load is about 4.96 V, can be 5 V

CodePudding user response:

reference xuyaqi029 reply: 3/f

pin wrong.

At first meet wrong, packaging picture is wrong, then the input and output sub is 5 V, and then found the problem, found that turned out to be 3.6 V, is probably the chip burned out

CodePudding user response:

refer to the second floor Naunyang response:

output voltage has a little fluctuation, have add filter capacitor? Add a 10 uf and nf 100 capacitance,

Are added, according to reference picture

CodePudding user response:

In the case of with load and wiring correct use multimeter to test out is about 3.25 V is correct, table test showed that are usually less than 3.3 V

CodePudding user response:

AMS1117-3.3 V, 5 V input, the output is only 3.6 V, error nearly 10% chip quality has a problem, should be stable in the vicinity of 3.3 error within 1%

CodePudding user response:

A little fluctuation is very normal! If the output must be 3.3 V. You can change the IC

CodePudding user response:

references 9 f AK527 response:

a little fluctuation is very normal! If the output must be 3.3 V. You can change the IC

Don't mislead people

CodePudding user response:

Change the film then add filter capacitance front end are very simple chip is easy to screen out this problem

CodePudding user response:

The chip is broken, change the chips

CodePudding user response:

They have minimum output current, add a load resistance to see; In addition, there is output capacitance, you see if capacitance value or type is wrong,

CodePudding user response:

Should be the no-load voltage of 3.6 V, behind the 1117 plus load measurement should be 3.3 V

CodePudding user response:

See how the ripple, isn't it great; Do not conform to the requirements of the ESR, suggest to add a bunch of resistance