TPS745-Q1: EN pin equivalent circuit

Shinji Tsuji

Part Number: TPS745-Q1

Hi team,

1) Could you please give me EN pin's input equivalent circuit?

2) Is there protection diode on this pin which triggers in operating condition?

3) Is there internal pull-up or pull-down in EN pin? (I saw one E2E thread say "there is internal pull-down, and the other thread say "no pull-up/pull-down").

4) Ven input current is typical 10nA only if Ven<Vin, correct? If Ven>Vin then datasheet Figure 6-28 applies. Is my understanding correct?

regards,

over 1 year ago

0 Kelsey Farr over 1 year ago

TI__Expert 6640 points

Hi Tsuji-san,

Let me look into this and get back to you with an update by the end of the week. Thanks for your patience.

Regards,

Kelsey

0 Kelsey Farr over 1 year ago in reply to Kelsey Farr

TI__Expert 6640 points

Hi Tsuji-san,

My apologies for the delay, this is taking longer than planned. I'll have an update for you by EOD Monday US time.

Regards,

Kelsey

+1 Kelsey Farr over 1 year ago in reply to Kelsey Farr

TI__Expert 6640 points

Hi Tsuji-san,

Shinji Tsuji said:
1) Could you please give me EN pin's input equivalent circuit?

The EN circuit is a simple comparator circuit with an internal reference voltage which sets V_EN threshold. If the input on the EN pin goes above the V_EN threshold, the comparator is driven high and the LDO is enabled.

Shinji Tsuji said:
2) Is there protection diode on this pin which triggers in operating condition?

There is not a protection diode on EN in TPS745-Q1.

Shinji Tsuji said:
3) Is there internal pull-up or pull-down in EN pin?

There is no internal pull-up or pull-down on the EN pin.

Shinji Tsuji said:
4) Ven input current is typical 10nA only if Ven<Vin, correct? If Ven>Vin then datasheet Figure 6-28 applies. Is my understanding correct?

Yes, this is correct.

Regards,

Kelsey

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TPS745-Q1: EN pin equivalent circuit