TPS563257: Enable voltage level

Nachiketh Karanth

Part Number: TPS563257

Hello,

I have connected a voltage divider to enable pin, the voltage without connection to enable of IC is 2.5V, but when connected to IC it drops to 0.5 V.

I tried connecting different resistors, everytime issue persists, I get different voltages each time, but it will be less than enable threshold voltage. What might be the issue?

Below i have attached the schematics for reference.

/cfs-file/__key/communityserver-discussions-components-files/196/0741.TPS563257DRLR.pdf

Thanks

11 months ago

0 Lucia Gao 11 months ago

TI__Mastermind 18540 points

Thanks for reaching out! The connection of EN resistor in the schematic is good. Is this problem exist in every device and board? Could you please share me the layout? Could you please share me the waveform of VIN, EN and SW?

Thanks!

BRs

Lucia

0 Nachiketh Karanth 11 months ago in reply to Lucia Gao

Intellectual 520 points

Hello

1. Enable issue is solved

2. Getting a new issue, i am getting output voltage as 0.78V, when the circuit is designed for output voltage 0.85V.

3. Please verify the circuit.

Thanks

+1 Lucia Gao 11 months ago in reply to Nachiketh Karanth

TI__Mastermind 18540 points

Hi Nachiketh,

Thanks for your feedback. There is a thread discussing the same problem as yours? Is this the same one? If yes, I will first close this thread and discuss with your team in another thread.

(+) TPS563257: Power management forum - Power management forum - Power management - TI E2E support forums

Thanks!

BRs

Lucia