All Questions
14
questions
2
votes
1
answer
114
views
How to choose the right inductor for buck converter with LM5143A-Q1? (from TI)
While working on my first voltage regulator circuit I got stuck at calculating the inductor value... The IC is LM5143A-Q1 from Texas Instruments, and according to the datasheet, the formulas for ...
- 411
1
vote
2
answers
115
views
Can anyone see why I'm killing my buck regulator?
I've tried hard, but I can't figure it out. The buck regulator runs for about about 1 s and then it dies with the buck regulator shorted to ground.
The LDO is working fine. If I power the LDO with 5.5 ...
- 145
0
votes
3
answers
1k
views
Buck converter unstable output voltage
I am trying to use an AP6507 to power a Raspberry Pi from a 12V battery. In the datasheet is written that it should provide a continuous current of 3A, but when I try to power the Raspberry Pi, the ...
- 1
-1
votes
2
answers
273
views
Buck / step down voltage in limited space
I am designing a small PCB. The supply voltage is 12V, but I also need 5V with supply of maximum 250mA.
The most obvious solution is to use voltage regulator - there are plenty of them and some like ...
- 555
0
votes
2
answers
104
views
How can the output current be programmed in the LTC3649 step-down regulator?
I use Analog Devices' LTC3649 regulator as a step-down regulator. It is said that there is a programmable output current in the datasheet, but I have no idea how to do this. Does anyone have an idea ...
- 11
1
vote
0
answers
105
views
MIC28515 overheating with high input voltage
I've designed this MIC28515 buck regulator based on the manufacturer schematic reference. I'm planning to run it at 70VIn
I'm doing the tests with @ 5V 2A load Temp(Amb) = 20C.
When I set a VIn of ...
- 155
1
vote
1
answer
3k
views
Buck converter input voltage lower than the designed output voltage
I have this buck converter which is designed to produce an output voltage of 9V for an input range of 18V-36V.
The datasheet of the buck converter mentions that the minimum required input voltage is 4....
user220456
1
vote
0
answers
77
views
Considering the inductor in a buck DC-DC converter, how to compute the current through it?
I've been stuck for a few days to the very first point of a lab in which we analyse the behaviour of buck and boost converters. The circuit is built by the university I study in, so there is no acutal ...
0
votes
2
answers
740
views
No Output From LM2596-5T from TI. Any Ideas Why?
So I built a board with LM2596-5T as the voltage regulator. Below are my schematics.Just as described in the datasheet.
And the layout is as below:
After assembling, the output is at 0V. Vpin12 is ...
- 17
1
vote
0
answers
66
views
Stable 12V 1.5A
I'm in need of a stable 12V 1.5A power which I could carry with myself.
One way of doing it would be to strap, say, 12x 1.2V rechargeable batteries and use LM317. But then I read about buck ...
- 133
0
votes
1
answer
480
views
MCP16301 Step Down Voltage Regulator PCB Layout Validation
I'm looking for some feedback/validation that the layout for this MCP16301 is correct. I'm trying to get 600mA 3.3v Out from 12 input.
I'm using the circuit as described in the datasheet on page 23 ...
- 357
1
vote
2
answers
678
views
How to control output voltage on a Buck Converter
I'm fairly new to electronics and I have copied the Buck Converter (LM2678) in the picture attached to convert 24V to 5V. After trying it I have actually converted 24V to 9V and my question is if I ...
- 117
0
votes
2
answers
658
views
TI TPS57160-Q1 step-down converter outputs sawtooth-like voltage at high input voltages
Disclaimer: I have posted this question on Texas Instruments' E2E Community before (Here), but haven't found a solution to my problem yet. In the meantime, I haven't found any way to progress on this ...
- 187
2
votes
3
answers
4k
views
How to achieve the max efficiency from a Buck converter
I have a question about switching step-down regulators.
(As I stated in my previous questions, please consider the fact that that I'm not very expert, so feel free to reply/talk as if I were a student....
- 205