LP2951-Q1: Does the shutdown pin have an internal pull down resistor

Hi Andreas, 

Can you share the DS for the Microchip LP2951? I do not see the 50kOhms pull down resistor on the Shutdown pin on the Microchip DS: 

LP2951 - 100 mA Low-Dropout Voltage Regulator (microchip.com)

Let me reach out our Design Team to verify if there is no pulldown resistor. 

Best, 

Edgar Acosta

Hi Edgar,

Thank you for looking into it!

The internal schematic is shown in Figure 4-3 on page 21 in the datasheet you linked to.

The LP2951 version specified in our current BOM is hard to get hold of at the moment, but I can buy LP2951-50-Q1. The original designer left the shutdown pin floating for some reason and I just need to make sure they are 100% compatible.

Best regards,
Andreas Wileur

Hi Andreas, 

Thank you! I totally missed Figure 4-3. 

I am still waiting for a response from our Designers to confirm if there is a pulldown resistor. I will respond as soon as I get an answer. 

Best, 

Edgar Acosta