All Questions
Tagged with buck voltage-regulator
141
questions
1
vote
1
answer
60
views
Do IC step-down/buck converters generally boost voltage when the input falls below the desired output?
I’m trying to select a buck convertor to regulate the output of a LiPo battery so I can use it to replace two AA batteries. Ideally I want the regulation to happen only when the battery is above 3 V. ...
- 123
0
votes
2
answers
745
views
Bead on buck regulator circuit
I came across a DC-DC converter schematic and I notice that they use a bead on the schematic. I would like to know the purpose of this chip on this circuit and what the effect of removing it.
- 3
1
vote
2
answers
319
views
PWM signal to "real" analog signal with low load dependency
I am designing a circuit that allows me to regulate an Arduino PWM output to a stable voltage reference (PWM to 0-5V ideally) dependent on the duty cycle. So far my approach has been to attach a low ...
2
votes
4
answers
522
views
Simpler ways to develop a buck regulator
I am designing a low profile space grade buck regulator. I have the following constraints
ICs must be space grade
Low component count
Small size
The converter specifications are as follows. Input ...
- 97
0
votes
1
answer
1k
views
buck converter with a simple bypass schematic mode?
in my design i need to place a buck converter 10-30V input with a fixed 12V output. my concern is that when the battery volatge level is low (for instance 10v) the device will stop bucking. so i want ...
3
votes
2
answers
467
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LM22678 Unstable output
I am building a voltage regulator with the LM22678-5.
I used TI WE-Bench designer to get the component values needed for the regulator:
The regulator outputs 5V when there is no load however it ...
- 63
2
votes
2
answers
1k
views
Multiple Step-Down Voltage Rails from a single DC Power Supply
I have one working PCB which has three different Voltage Rails: 3.3V, 4V and ...
- 962
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
0
votes
1
answer
107
views
Correct power supply for my project
I am making an autonomous bot where i need to power a few sensors (IR, PIR, sonic,etc) and an arduino. In total the sensors draw about 300 mA current(max).
My power supply is a LIPO of 12 V (11.1 V),...
- 151
2
votes
2
answers
1k
views
Buck-converter dynamic output-voltage using digital-potentiometer
I am driving a load at 40 V, 4.8 A, and would like to dynamically change the voltage being supplied to it, ideally creating a 2-40 V range with increments of <0.1 V. To achieve this, I am thinking ...
- 21
0
votes
1
answer
613
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SY8113 based Buck Converter Voltage Regulator design
I am working on an Electronics design which incorporates DC-DC buck converter voltage regulators. This is the first time I've been working with buck converters, so I have no experience and only ...
- 195
1
vote
2
answers
575
views
Setting up a step-down buck converter
I'm new to using buck converters. In the past I've just used linear voltage regulators but due to heat issues in my current project I've decided to give a buck converter a try, but I'm getting really ...
- 169
4
votes
1
answer
3k
views
How does this current limiter work? - and why doesn't it?
I have a generic Ebay DC-DC buck converter, and the current limiting circuit is not working. I find that such devices often suffer from this issue, so I figured I'd reverse-engineer it in hopes of ...
- 1,465
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
170
views
What will be the output ripple current per capacitor buck regulator?
I have a existing buck regulator design. Converter part number: TPS54340Q1.
Input voltage = 5 V.
Output voltage = 3.3 V
RMS ripple current is calculated as = 108 mA. (Don't worry too much about ...
- 897