All Questions
Tagged with buck voltage-regulator
141
questions
19
votes
6
answers
14k
views
Why do buck (step-down) switching regulators require an inductor and diode?
So, I understand, at least at a basic level, the method of operation of switching converters, both buck and boost. What puzzles me, though, is why buck converters in particular aren't simpler.
Why ...
- 7,749
17
votes
5
answers
31k
views
Is it ok to connect the output of buck regulator in parallel?
I am using MCP16322 buck regulator powered from 12V and outputs 5V and 2A. Is it ok to connect the output of two of these in parallel? Does connecting the outputs in parallel mess up the maximum ...
- 937
15
votes
3
answers
2k
views
Why did my DC/DC Buck Circuit fail?
I'm in the process of debugging a PCB I made. On this board, a 24V input feeds through a DC/DC buck circuit (based around the TI TPS54202DDC) to output 11V, then an LDO to output 9V (to ensure a very ...
- 671
11
votes
4
answers
3k
views
Boost or buck regulator for battery life?
I want to make a wireless sensor node that will run at about 2.5v. I am trying to decide between running 3 alkaline batteries in series with a buck converter or in parallel with a boost converter. I ...
- 1,202
10
votes
2
answers
1k
views
Is this normal Buck Regulator behaviour?
I recently got around to trying out buck regulators, my results weren't what I was expecting though. For one the ripple voltage seems a little high to me, It's about 800mV with no load and goes up to ...
- 2,525
7
votes
2
answers
887
views
Is there a reason to use smps regulators over modules
I'm just discovering that TI have switch mode power modules as well as regulators. For example they have the LMZ12001 which would be significantly easier to use than the TPS62150 regulator.
Elektor ...
- 2,588
7
votes
4
answers
5k
views
Efficient low-power buck (step-down) regulator IC for Li-Ion - 3.3V conversion?
It's not easy for electronics novice to find good element base, so I hope this suitable question.
Requirement: Efficiently power a lean, 3.3V-based MCU design from a Li-Ion battery. "Efficient" ...
- 275
6
votes
1
answer
8k
views
How step-down voltage regulators behave when their input drops below their output voltage?
How do the common low-dropout LP2950 and buck LM2596 regulators behave when their input voltage drops below their output voltage?
I'm driving a micro-controller board rated for 3.7-5.5 V with a 4.8V ...
- 285
5
votes
3
answers
2k
views
What is the purpose of capacitor C4 (47 pF) in the feedback network of this buck converter circuit?
What is the purpose of capacitor C4 (47 pF) in this circuit?
Datasheet
- 214
5
votes
4
answers
8k
views
What is the difference between voltage regulators, resistors, and buck converters?
I am new to electronics and I would like to know the difference between voltage regulators, resistors and buck converters like the LM2596 and their advantages, disadvantages and use cases.
I tried ...
- 96
5
votes
2
answers
7k
views
Input voltage for feedback pin on LM2596 Voltage regulator
I am using LM2596 for a dc supply where I could alter the output voltage. Datasheet here.
I have setup according to page 9 "Adjustable Output Voltage Versions". Everything worked fine. The output ...
- 255
5
votes
1
answer
550
views
Voltage regulator LMR33630 doesn't work, asking for circuit review
I've put LMR33630ADDAR voltage regulator into a PCB with this circuit:
It's slightly different from the example from datasheet:
PG isn't connected, CFF capacitor absent and feedback resistors are ...
- 273
5
votes
3
answers
2k
views
Capacitor self resonance in a buck converter
I'm building a 5 V regulator for a PCB, and I was reading through the datasheet and Wikipedia to make sure I was doing it right.
What baffles me is that the regulator switches at 150 kHz. ...
- 375
4
votes
4
answers
2k
views
Ways to power an Arduino from 24 VDC
I want to power an Arduino (Wemos D1 Mini) with 5 or 3.3 V from my garage door opener, which has 24 VDC available.
As far as I understand, this can be solved in the following ways:
Step down buck ...
- 71
4
votes
2
answers
509
views
Buck converter based regulator
Buck converters are extensively used in switching voltage regulator.
I think it's essential for a buck converter to be closed loop to behave as a voltage regulator, otherwise for open loop it's just a ...
- 339