WEBENCH® Tools/TL760M33-Q1: TL760M33Q1 Design Parameters

divyanshu bawa

Part Number: TL760M33-Q1

Tool/software: WEBENCH® Design Tools

I have Used TL760M33Q1 in my design to bring 24v to 3.3v directly. I am having a problem in its output voltage. It giving 2.1v something. Moreover sometimes it don;t even show any output voltageI

have not put any capacitor at the input and output side of Ldo(TL760M33Q1). Can u please help me suggesting the value of capacitors for the same ...?. In datasheet the vales are given for 6v.

Please look into this on priority

over 5 years ago

0 divyanshu bawa over 5 years ago

Expert 1325 points

Waiting for your reply

Thank You

0 Jason Song over 5 years ago in reply to divyanshu bawa

TI__Mastermind 23361 points

Hi Divyanshu,

For the capacitors, you can use the values that are used when characterizing the device. As the datasheet states, All characteristics are measured with a 0.1-mFthe 0.1-uF capacitor across theinput and a 22-uF tantalum capacitor,with equivalent series resistance of 1.5Ω on the output. You can use different kinds of capacitors, but please make sure they meet the requirements of the ESR on those capacitors.

The device requires capacitors with certain ESR to be stable.

Regards,
Jason Song

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

HI Jason

I am puting the 10uf tantalum capacitor at the output. But still the LDO does not derive. It shows 0.0v at output
I treid putting 10uf at the input also still its not working. I have a input of 24v according to u which value capacitor would be fine my current wont be more than 400ma.

Thanks

0 Jason Song over 5 years ago in reply to divyanshu bawa

TI__Mastermind 23361 points

Hi Divyanshu,

The output capacitor matters most for stability concern. For the input cap, a low-ESR capacitor should work. Are you doing the test with real parts or just in WEBENCH® Tools for simulations?

Regards,
Jason Song

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

HI Jason

I am working on real design

0 divyanshu bawa over 5 years ago in reply to divyanshu bawa

Expert 1325 points

will 10uf at the output will work without having input capacitor..?

0 Jason Song over 5 years ago in reply to divyanshu bawa

TI__Mastermind 23361 points

Hi

For the input cap, a low-ESR capacitor should work. If you need help on debugging the circuit, please share your schematic and scopeshot that shows the Vin, Vout.

Regards,
Jason Song

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

It’s simple

Input voltage 24v. Having 10uf parallel capcitor

Output 3.3v having parallel capacitor . As given in datasheet.

0 Jason Song over 5 years ago in reply to divyanshu bawa

TI__Mastermind 23361 points

HI Divyanshu,

Will you please also share the scopeshot of your Vin and Vout?

Regards,
Jason

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

Please give ur mail I’d

0 Jason Song over 5 years ago in reply to divyanshu bawa

TI__Mastermind 23361 points

Hi

In order to support further, we require the requested scopeshot. Without the scopeshot we are not able to support you remotely.

Regards,
Jason

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

Hi
I will send u my design on email id

0 divyanshu bawa over 5 years ago in reply to Jason Song

Expert 1325 points

Hi . I have put jumper for 24v. and that footprint is of output capacitor 10uf 0805 package before theLDO. Same input capacitor has put on the other side of the design at 24v of 10uf. Please look into this

0 divyanshu bawa over 5 years ago in reply to divyanshu bawa

Expert 1325 points

I think this would help u know more about the design.

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WEBENCH® Tools/TL760M33-Q1: TL760M33Q1 Design Parameters