• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 176 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS61235P: 3V to 5V current cannot exceed 1.1A

Ioannis Manousakas
Prodigy 90 points
Part Number: TPS61235P
Other Parts Discussed in Thread: TLV61048, TPS63030, LMR62014, TPS61022, TPS61023

With the circuit shown cannot get more than 1.1A  (Vin=3V , Inductor is XAL7030)

Any suggestions?

Thanks!

  • 0
    TI__Mastermind 34201 points

    Hello Ioannis,

    Did you follow the datasheet layout guideline for your board? It's recommended to put a small ceramic capacitor close to Vout pin and GND pin. 

  • 0 in reply to Zack Liu
    Prodigy 90 points

    Now I have and it is working !!! Thank you!!!

    It was not very clear in the datasheet that it is absolutely necessary to have  a small capacitor close to Vout except the bulk capacitor.

    Is it correct to assume  that it is the same for all similar type of ICs? (or at least for these TPS61022, TPS61023, TPS63030, TLV61048, LMR62014)

  • +1 in reply to Ioannis Manousakas
    TI__Mastermind 34201 points

    Hi Ioannis,

    Yes, layout and a small capacitor close to Vout is very important for a boost converter. The bulk aluminum electrolytic capacitor has very big ESL and ESR while small package ceramic capacitor has very low ESL, ESR. This ceramic capacitor is helpful to reduce the total switching loop total parasitic inductance. Please read the App note to understand in detail.