For a -5Vout inverting boost function, please see these reference designs:
http://www.ti.com/tool/PMP9760 (lower current discrete)
www.ti.com/.../TIDA-01457 (higher current module)
Hi Jacky,
This seems ok but it would need to be tested for sure.
It builds on these 2 example circuits: the -5V inverter and the +/- split rail circuit
http://www.ti.com/tool/TIDA-01457
http://www.ti.com/lit/an/slva616/slva616.pdf
Compared to…
Hi Glenn,
You said it perfectly. This device is (just) an inverter. The output is not regulated, but only inverted. The output will be lower than the input by an amount equal to the output impedance times the load current. This is explained on page…
Hi Yuyun,
Yes, you can. Please see this reference design with the TPS62136, from the same family but with a lower switching frequency: www.ti.com/.../TIDA-01423
As well, we have the TPS82130 module with this reference design: www.ti.com/.../tida…
Hi Atin,
Let me explain how the operation of the enable process in the design in TIDA-01457 works and I hope this would clear any doubt you have about this “multiple grounds” issue.
So let’s first take TPS82130 alone in normal operation as a buck…
Hi Giles,
Do you have a +/-15V in and need +/-5V out? How much current do you need?
Usually, customers would take the +15V to +5V. The negative -5V rail might be made in different ways, depending on how much current is needed.
This FAQ describes…
Part Number: TPS82130 Other Parts Discussed in Thread: TINA-TI , , TIDA-01457 Tool/software: TINA-TI or Spice Models Hello,
I am using the TPS82130 in a design to step down to -2.5V from 12V in an inverting configuration. I would like to run some simulations…
Hi Sakai-san,
Yes, TPS63700 is an inverting buck-boost converter that can operate under your Vin, Vout, and Iout.
But it is an older and larger device. I would rather recommend the much smaller TPS82130 module, in a design like these:
www.ti.com…
Hi User,
Here is a reference design for very close to what you need, using the module version of this device: www.ti.com/.../tida-01457 You can use the same approach with the discrete TPS62130/5/6 to increase the output current to your 0.8A need. …
Hi Nishizawa,
Yes, this is correct as shown in the D/S title (it is an inverting buck (step-down) converter) and on page 1 with the output voltage limit.
You can get 200 mA with a simple inverting charge pump like LM2776. Vout will be much lower…
