DC regulator IC/solution

There is a typo

Is there a specific Vinmax that you need for any ringing or headroom? It sounds like 18V +/- 20% would be covered by a 24-28V device.

The TPS62175 is a 28V 0.5A device that should work for your specs 

LMR54406 (36V; 0.6A) is one of our newest devices and is p2p with LMR54410 (36V; 1A) for flexibility. 

TPS560430 (36V, 0.5A) currently has inventory on TI.com.

Hello Nicole,

Noted and thanks for your reply. I have studied your suggested IC, but it seems that it does not have a pin to accept a control signal.

This product is under feasibility study, so information is limited to expose. Please find below information in more details so that you could understand better and help to give an more suitable solution.

The product needs a DC voltage regulator IC (hereinafter regulator) to drive internal circuit.  The basic requirements for the regulator are listed below (items 1, 2 and 3).

However, the key requirement of the design is that output voltage of the regulator needs to be lowered to around 70% of its rated value (say 70% of 12V which is 8.4V) after a controllable period of time. The product will have a built-in MCU that it could provide a control for this, so the point here is that the regulator needs a pin to accept the control signal. Please advise if there is suitable DC regulator IC/solution to fit this application, thanks.

1) Input voltage: DC18V+/-20%.  Tolerance of 20% is a requirement enough to meet the requirement, a wider input voltage range is of course a merit. 

2) Output voltage: it is not specified, it could be designed by ourselves as 5V, 9V or 12V etc.

3) Output current: 500mA.

• Hi Danny,

When you mention needing to accept a control signal, are you looking for an enable pin to control when the device turns on? Or something like a Sync pin to sync to an external clock?

We have many devices that meet the input/output/Iout specs you are listing with slight differences in functionality or feature sets. Any more information you can give to help me narrow it down for you would be helpful. We also have a portal on TI.com that lets you filter down to the perfect device for you without having to reveal on a public forum any private information. 

Best,

Nicole

Dear Nicole,

No,  we are not asking neither a enable pin nor a sync pin, we are asking that when our product is Powered ON, the output voltage of the built-in regulator is initially, say 12V, then output voltage of the regulator needs to be lowered to around 70% of its rated value (say 70% of 12V which is 8.4V) after a controllable period of time (say 5 seconds). The product will have a built-in MCU that it could provide a control signal for this, so the point here is that the regulator needs a pin to accept the control signal to switch the output voltage from initially 12V, then change to 8.4V and keep at 8.4V.

Regards,

Danny.