TPS709: a alternative solution when EN floating, output disable

Kailun Liu

Expert 3123 points

Part Number: TPS709

Tool/software:

Hi Team,

Can you suggest a alternative of TPS709A33DBVR that output disable when EN floating

4 months ago

0 Alex Davis 4 months ago

TI__Genius 13390 points

Hi Kailun,

Can a pulldown resistance of approximately 100kΩ be added externally? This would ensure the TPS709A would remain disabled unless actively pulled high.

Best Regards,

Alex Davis

0 Kailun Liu 4 months ago in reply to Alex Davis

TI__Expert 3123 points

Hi Alex,

This is applied in pack, the power consumption 100kohm brings is unacceptable for customer.

0 Alex Davis 4 months ago in reply to Kailun Liu

TI__Genius 13390 points

Hi Kailun,

It does not appear that any of our LDOs with a similar quiescent current, supply range, and output current have an enable pin with this behavior. An external logic gate or resistor pulldown may be able to achieve this behavior, but will depend on the customer's other requirements.

Best Regards,

Alex Davis

Power management

Power management forum

TPS709: a alternative solution when EN floating, output disable