TPS61256: Any requirements for EN pin rise time ?

user5143197

Prodigy 120 points

Part Number: TPS61256
Other Parts Discussed in Thread: TPS54218,

Hi,

I'm considering to delay the PWRGD signal from TPS54218 for about 1ms by employing an RC circuit.

Then the delayed PWRGD is connected to EN pin of TPS61256 to delay its start-up time.

My concern is that if the RC circuit makes slow rise time on EN pin of TPS61256 and cause any problem like failure.

Is there any requirements for EN pin rise time ? or does this circuit cause any other problem ?

over 6 years ago

0 Zack Liu over 6 years ago

TI__Mastermind 34231 points

Hi,

I can't see your picture. Can you send it again?
For TPS61256, the EN pin low level input voltage is 0.4V and high level input voltage is 1V. The hysteresis feature prevents the device is enabled or disabled frequently. No requirement for EN pin rise time.

0 user5143197 over 6 years ago in reply to Zack Liu

Prodigy 120 points

Thank you for quick reply! Your answer is enough to resolve.

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TPS61256: Any requirements for EN pin rise time ?