PMOS NMOS recomendation for square wave inverter for SHDN

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yefj

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Hello , ltc1261lcs8 needs to be both turn on and off using esp8266 3.3V GPIO pulse and the output needs to charged and discharged with this GPIO pulse.
When my GPIO =0V output off when GPIO=3.3V output is ON.
Which is the opposote of what the SHDN does as shown in the data sheet below.
I need 5V to shutdown the DC-DC which is another problem.

So basicly i need to take my 0-3.3V pulse some how to invert it and make the input 0-3.3V into 0-5V?
What NMOS and PMOS do you reccomend ?
Thanks.



 

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The SHDN pin on the LTC1261LCS8 is active low, meaning a high signal turns it off. However, you want the opposite behavior. The SHDN pin requires a 5V signal to properly control the LTC1261LCS8.
You can use an NMOS to invert the GPIO signal.

  • Source: Connect to Ground.
  • Drain: Connect to a pull-up resistor (10kΩ) which is connected to 5V.
  • Gate: Connect to the ESP8266 GPIO.
 

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Hello , I also need to discharge the output at 0 logic and make the output charge at 5 V
How do I make this ?
Thanks.
 

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