LP5569: Logic Interface Characteristics

user6519235

Part Number: LP5569

Hello,

I have a question about the datasheet [7.8 Logic interface Characteristics].
The output low level test condition is Ipullup = 3mA.
Do I need to flow Ipullup=3mA as well?

In LP 5569 EVM schematic, VIN = 3.3 V Rpullup = 6.04 k,
so Ipullup = 0.55 mA.
Ipullup=3mA might not be necessary?

If there is a recommended current value, please let me know.

Best regards,

Hyodo

over 4 years ago

0 Monet Xu over 4 years ago

TI__Genius 9255 points

Hi Hyodo,

The Ipull-up current is not required to be 3mA. Datasheet just provides a reference low level output voltage range when setting Ipull-up to 3mA. There is no specific requirements but for low power consumption the current should not be large.

Best Regard

Monet Xu

0 user6519235 over 4 years ago in reply to Monet Xu

Prodigy 220 points

Hi Monet,

Thank you for your quick reply.

So ,I use it at 1.8 V, 1.8 K ohm (Ipullup = 1 mA）

Please tell me the value of Vol (typ.,max.) in that case.

Best regards,

Hyodo

0 Monet Xu over 4 years ago in reply to user6519235

TI__Genius 9255 points

Hi Hyodo,

We don't test the range of low voltage in this situation so it is hard for us to provide. you can test the specific voltage in the board.

Best Regard

Monet Xu

Power management

Power management forum

LP5569: Logic Interface Characteristics