TPS62262-Q1: Does the EN threshold have hysteresis?

Mark Pieper

Part Number: TPS62262-Q1

We are enabling this device by connecting the EN to an LDO output that has a turn-on time of up to 500us and a fall time that is much slower. Will we have any problems with the EN causing indeterminant ON or OFF control? Thanks.

over 5 years ago

0 Kevin-Cheng over 5 years ago

TI__Expert 3135 points

Hi Mark,

The EN pin is turned on and off by detecting the voltage, it doesn't require the turn-on and turn-off time, just need to pay attention to its VIH and VIL threshold.

Best regards,

Kevin

If this answers your question, Please click "This resolved my issue" button.

____________________________________________

TPS62810-Q1 – New Automotive 6Vin, 2.25MHz buck family with 1% accuracy and SYNC-pin. 1-2-3-4A options.
Smallest 2x3QFN package with wettable-flanks for optical PCB inspection.

0 Mark Pieper over 5 years ago in reply to Kevin-Cheng

TI__Expert 4510 points

Thanks, Kevin, but I'm concerned about jittering on/off of the device due to noise on EN while it slowly transitions through the area between Vil and Vih.

Is there hysteresis in the EN function?

Thanks,

Mark

0 Kevin-Cheng over 5 years ago in reply to Mark Pieper

TI__Expert 3135 points

Hi Mark,

TPS62262-Q1 have start-up time(500us) and internal soft start(250us), the short jittering will have little effect on the enable function.

Best Regards,

Kevin

If this answers your question, Please click "This resolved my issue" button.
____________________________________________
TPS62810-Q1 – New Automotive 6Vin, 2.25MHz buck family with 1% accuracy and SYNC-pin. 1-2-3-4A options.
Smallest 2x3QFN package with wettable-flanks for optical PCB inspection.

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TPS62262-Q1: Does the EN threshold have hysteresis?